Questions Asked on
December 7, 2010

  1. chemistry

    Co-precipitation is the process by which undesirable materials are "carried down" and trapped on the suface or within the desired precitate. The precipitate is washed with distilled water to remove the co-precipitates which are more soluble that the

    asked by Patrick
  2. spanish

    I am preparing for my oral exam (spanish 1) and i wrote all this down, can any one check my grammar, conjugations and add-on if necessary And also would this last me 3 minutes or should i write more to each question?? Theme 2 (el tiempo libre) ¿Cuáles

    asked by lauren
  3. Physics

    A sign is supported at its top right corner, point P. The sign is a square with 40 cm on each side and has 8.0 kg mass. What is the magnitude of the horizontal force that P experiences?

    asked by Steve
  4. Chemistry

    What is the mole of oxalic acid? Equation:H2C2O4 + 2NaOH---> Na2C2O4 + 2H2O *Moles of oxalic acid dihydrate is 0.032 mole. * Molarity of oxalic acid solution is 0.128 M oxalic acid solution. * Initial volume of Oxalic acid is 19.8 ml and Final volume is

    asked by Ivy
  5. college Chemistry

    A 21.18 mL of 0.250 M NaOH is titrated with a H2SO4 solution. The initial volume of H2SO4 was 13.28 and the final volume of H2SO4 was 28.29 mL when the solution turned very slightly pink. What is the concentration of NaOH?

    asked by Ivy
  6. Chemistry

    As one descends group 6A of the periodic table, the number of valence electrons found in each element? A. Increases B. Decreases C. Remains the same

    asked by Ivy
  7. Chemistry

    Which is not a ground state electron configuration? A. 1s2 B. 1s2 2p1 C. 1s2 2s2 D. 1s2 2s2 2p1

    asked by Ivy
  8. math

    -17-(-5)

    asked by jesse
  9. 6th grade

    -17-(-5)

    asked by jesse
  10. college

    Support sentences for the sentence high rise apartments are efficient housing

    asked by Anonymous
  11. chemistry

    how many mL of 1M HC2H3O2 are required to neutralize a spill of 25mL of 6M NaOH?

    asked by erin
  12. complex Analysis

    \int_{-\infty}^\infty {1 \over (4+x^4)} ,dx

    asked by yilma Abdi
  13. math

    -17-(-5)=

    asked by jesse
  14. methodologies

    hmo director wants to know ifmanaged care plan meets industry standared. what is on way to do this?

    asked by Patty
  15. MATH

    Carmen deposits into an account that pays simple interest at a rate of per year. How much interest will she be paid in the first years?

    asked by AMBER
  16. Logic Help

    1. G > H 2. A > (G • E) 3. A / A • (H v B) 4. 5. 6. 7. 8.

    asked by Mary
  17. 8th grade math

    After each snowstorm in Big City, USA plows remove snow from 762 lane miles of road, which is equivalent to about 48,000,000 square feet. The snowfall total was 34.2 inches in Big City, USA last winter. Suppose every snowfall evenly blanketed all road

    asked by Anonymous
  18. Physics

    A 3.90×10^2kg cube of ice at an initial temperature of -18.0degreesC is placed in 0.480kg of water at 41.0degreesC in an insulated container of negligible mass. Calculate the change in entropy of the system. I found the equilibrium temperature to be at

    asked by Melissa
  19. math

    -20 divided by(-10)

    asked by jesse
  20. math

    Determine the domain and range of the function. 4-X^2 if x2

    asked by Jeff
  21. college

    if the value of machine is 50,000,estimated useful life is eight years and scrap value is 4000 calculate straight line method for 2 years

    asked by 123
  22. math

    lennifer can you help... -20 divided by (10)= p.s. i don't have a divided by sign.

    asked by jesse
  23. college Chemistry

    what mass of H 2 O is needed to completely react with 5.10g SiCl4

    asked by CHAZ
  24. chemistry

    Calculate the theoretical yield of CO2 when 4.16g of acetylene,C2H2,undergoes complete combustion?

    asked by CHAZ
  25. math

    -20 / (-10) =

    asked by jesse
  26. 6th grade

    -20 / (-10)=

    asked by jesse
  27. Almeida

    The two largest diner chains in Kansas compete for weekday breakfast consumers. The two chains, Golden Inn and Village Diner, each offer weekday breakfast customer a �breakfast club� membership that entitles customers to a breakfast buffet

    asked by Pedro
  28. spanish

    I am preparing for my oral exam (spanish 1) and i wrote all this down, can any one check my grammar, conjugations and add-on if necessary And also would this last me 3 minutes or should i write more to each question?? Theme 3 (Chicago) ¿Cómo es Chicago?

    asked by lauren
  29. spanish

    I am preparing for my oral exam (spanish 1) and i wrote all this down, can any one check my grammar, conjugations and add-on if necessary And also would this last me 3 minutes or should i write more to each question?? Tema 4 (un país hispanohablante)

    asked by lauren
  30. Mathematics

    Show that 2i and 1-i are both solutions to the equation x^2-(1+i)x+(2+2i)=0 but their conjugates,-2i and 1+i are not. Then explain why this does not violate the Conjugate Zeros Theorem.

    asked by Sarah
  31. chemistry

    the element germanium has a diamond-type structure.describe the structure of germanium.draw diagram

    asked by sweetie
  32. Chemistry

    A 23.6 molar solution of formic acid (methanoic acid) has a density of 1.16 g/ml. The molar mass of H, C, and O are 1g/mol, 12g/mol and 16 g/mol, respectively. What is the molality of this solution?

    asked by Eddie
  33. chemistry

    Please write the chemical equation and calculate the reaction enthalpy (or energy) for the total bromination (addition of bromine gas to all double bonds) of 2,3-dimethylbutadiene (if you do not know what 2,3-dimethylbutadiene is, assume C2H4).

    asked by Eddie
  34. chemistry

    If 840 mL of 0.0140 M aqueous Al3+ and 500 mL of 0.0680 M aqueous Br- are reacted, what mass (g) of Br- is produced? Al2(SO4)3(aq) + 3 CaBr2(aq) → 2 AlBr3(aq) + 3 CaSO4(s) Molar Mass (g) Br- 79.904 Al3+ 26.982 Br- 79.904 Molar Volume (L) 22.400 at STP

    asked by ann
  35. biotech

    write an sop that detail how to create 125 mM potassium phosphate buffer ph 7.1 at 32 degree celcius

    asked by jenn
  36. Commercial Law

    What is the difference between an offer and an invitation to treat and why is the difference important

    asked by MaSa
  37. chemm

    When a reaction mixture with a total volume of 1180 mL that is 0.0110 M aqueous NaCl was stoichiometrically produced as per the balanced equation, what volume (mL) of 0.0116 M aqueous Ca2+ was required? 3 CaCl2(aq) + 2 Na3PO4(aq) → Ca3(PO4)2(s) + 6

    asked by ann
  38. Thermodynamics

    A combined seperating and throttling calorimeter was used to determined the dryness fraction of steam flowing through a steam main at a pressure of 900kPa. The pressure and temperature after throttling were 100kPa and 110C respectively. The mass of water

    asked by Kay
  39. 8th grade

    Please suggest a few topics to present in micro-soft power point

    asked by Firdous
  40. English

    Choose the correct word to complete each sentence. 1. Despite wanting to pass the exam, Julia just couldn't get down to revising. She seemed to have a mental ___ about it. a. brick b. gap c. block d. space 2. When the counsellor listened to George's

    asked by Paige
  41. Calc

    Find the area of the largest rectangle that can be inscribed under the curve y = e^(-x^2) in the first and second quadrants.

    asked by Erica
  42. MATH

    Max’s credit card charges him 1.575% interest per month on his average daily balance in that month. Max’s average daily balance for January is $810. What is the interest that he will pay for January

    asked by JESSICA
  43. Chemistry

    the concentration of tritium in the wine is 0.34 times that found in the freshly bottled wines. if the half life of the tritium is 12.3 years, estimate the time elapsed since the wine was bottled. help please. thank you :)

    asked by Queen
  44. Russian

    A study of the causes of the American Revolution of 1776, the French Revolution of 1789, and the Russian Revolution of 1917 best supports the generalization that revolution is most likely to occur when

    asked by Anonymous
  45. Algebra

    Solve by elimination method. 7r-3s=14 3r+7s=64 Could never figure out the elimination method. Would love some help with this one. Thanks

    asked by Christina
  46. english

    Assuming that you are a mirror' explain it is a man's best friend in his youth and worst enemy in one's old age

    asked by ravi
  47. English

    Hello. I'll be very grateful if you will help me again. Please tell me if the sentences are possible in normal English: 1)Iran remains unshakeable / inflexible / steadfast / unwavering in its position. 2)Iran's position stays / remains the same /

    asked by Ilma
  48. physics

    What is the minimum downward force on the box ( m=30 kg)that will keep it from slipping? The coefficients of static and kinetic friction between the box and the floor are 0.40 and 0.30, respectively.One person is pulling the box forward with a force of 125

    asked by vinu
  49. chemistry

    At 7.0 degrees C, the volume of a gas is 49ml. At the same pressure, its volume is 74 mL at what temperature?

    asked by gary
  50. Math

    In a subdivison, 67% of homes have detached garages, 32% have a patio, and 13% have both. What is the probability that a house has a pation if you know that it has a detached garage? Please explain how you did the work, thanks.

    asked by Rena
  51. Math

    In a subdivison, 67% of homes have detached garages, 32% have a patio, and 13% have both. What is the probability that a house has a pation if you know that it has a detached garage? Please explain how you did the work, thanks.

    asked by Rena
  52. Chem

    did I do this right Consider the following reaction at equilibrium N2(g) + O2(g) + heat < = > 2NO(g) Indicate how each of the following will shift the equilibrium a. raising the temperature of the reaction. b. decreasing the volume of the reaction

    asked by Jason
  53. PLEASE HELP Chem

    Please tell me if these are right. 1.According to Le Chatelier’s principle, what is the effect on the products when N2 is added to the equilibrium mixture of each of the following reactions? a. 2NH3(g) < = > 3H2(g) + N2(g) B. N2(g) + O2(g) 2NO(g) C.

    asked by Carrie
  54. Chemistry

    A pure sample of tritium, 3H, was prepared and sealed in a container for a number of years. Tritium undergoes â decay with a half-life of 12.32 years. How long has the container been sealed if analysis of the contents shows there are 5.25 mol of 3H and

    asked by Queen
  55. Chemistry

    Palladium-107 undergoes â decay (t1/2 = 6.5 x 105 yr) to form silver-107. How long will it take for 0.150 mol of silver-107 to form from 1.25 mol of palladium-107? help please...thank you :)

    asked by Queen
  56. US

    really need HELP!!! can someone please give me a cite. Document a chronology of events beginning with the union's call for a strike. Pullmans Car Company

    asked by Attalah
  57. Algebra

    Whenever I see an expression like this, f(x)=-5x+6, how do I know if it is a function? Thank you.

    asked by Helene
  58. Physics

    When four people with a combined mass of 320 kg sit down in a car, they find that the car drops 0.80 cm lower on its springs. Then they get out of the car and bounce it up and down. What is the frequency of the car's vibration if its mass (when it is

    asked by Y0gi
  59. english

    the mother seal looks fat and scary. in this sentence is the verb used as a linking verb or an action verb

    asked by lane mullis
  60. Algebra

    Why do some regressions models give you r and some give you r squared? What does r squared tell you? If you take the square root of r squared for a model and get a number close to one does that mean that the closer the square root of r squared to one, it

    asked by Kevin
  61. statistics

    A USU today survey found that of the gun owners surveyed 275 favor stricter gun laws. Test the claim that the majority (more than 50%) of gun owners favor stricter gun laws. Use a .05 significance level.

    asked by randy
  62. statistics

    The Phillies were accused of cheating their beer customers by not putting enough beer in their 12 oz. cups. When 15 cups were selected at random, they were found to have mean of

    asked by shirley
  63. Math

    Two cards are drawn without replacement from an ordinary deck of 52 playing cards. What is the probability that both cards are kings if the first card drawn was a king? I'm thinking its 13/51 but not sure.

    asked by Rena
  64. statistic

    The ball team was accused of cheating their soda drinkers by not putting enough soda in their 12 oz. cups. 15 cups were selected at random and found to have a mean of 11.7 oz., sd of 0.5 oz., at a significance level of .01. Test the claim that the

    asked by shirley
  65. ALGEBRA/ CONFIRMATION

    I am told to graph and write in interval notation for 6 < x < 13. This is my answer (6,13) I would then graph with open ends to show that the endpoints are not included?? Please tell me if I am correct.

    asked by Jessica
  66. Stastics

    An employer claims that full time employees have a mean income of $35,000. A sample of 200 employees were considered. Their mean salaray was $34,000. POP sd of $4,000. Does her claim seem reasonable at at 0.05 significance level?

    asked by Sammy Jo
  67. Math

    two cards are drawn without replacement from an ordinary deck of 52 playing cards. what is the probability that both cards are kins if the first card drawn was a king? I was thinking it was 13/51 but not sure.

    asked by Rena
  68. Statistics

    You want to estimate the grades of st2%atistics students who gets grades of C or better. How many students should you survey to be 95% confident that the sample percentage is off by no more than 2 percentage points.

    asked by Marnetta
  69. Spanish

    you are preparing for a job interview for your dream profession. the job application asks you to write a paragraph eh espanol discussing the following things. please explain why you are interested in this profession, what activities will you do on a daily

    asked by Sara
  70. com155

    Describe your experience with credit and credit cards in a brief paragraph using at least five adverbs and five adjectives in your description. Bold the adverbs and underline the adjectives. What is the most effective way to determine whether a word is an

    asked by queen
  71. calculus

    What is the limit as x approaches infinity of radical (9x*2+x)-3x?

    asked by joc
  72. Statistics

    A researcher wants to estimate the mean serum cholesterol level for college age women. In a past study the stndard devition for this measure was 42 units. If the researcher wants to be off in his estimate by no more than three units ( with 99% confidence),

    asked by Marnetta
  73. math

    draw a 16-mile trail map with five locations where a hiker could start at any location, walk all 16 miles, and return to the same location without walking over any trail twice. I am confused here. At first I thought I would draw the map with the stops

    asked by m
  74. Calculus 1

    A ladder 10ft long rests against a vertical wall. If the bottom on the ladder slides away from the wall at 2 ft/s, how fast is the angle ladder makes with the ground changing when the bottom of the ladder is 5 ft from the wall.

    asked by Tina P
  75. Calculus

    A ladder 10 ft long rests against a vertical wall. If the bottom on the ladder slides away from the wall at 2 ft/s, how fast is the angle ladder makes with the ground changing when the bottom of the ladder is 5 ft from the wall?

    asked by Tina P
  76. energy conservation

    A car that is initially at rest at the top of a roller-coaster track moves down the track without friction. What must be the maximm initial height from which the car descends so that it will not fly off the 10-m-high circular hill at the bottom?

    asked by Shelby
  77. English

    Hello. I need some grammar and lexical help. 1)Is it possible to use the infinitive with "purpose/goal/objective/aim": "the initiative has a purpose/goal to improve the situation" 2)is it possible to say "the visit intends to demonstrate..." (or is

    asked by Ilma
  78. physics

    A car that is initially at rest at the top of a roller-coaster track moves down the track without friction. What must be the maximm initial height from which the car descends so that it will not fly off the 10-m-high circular hill at the bottom?

    asked by Shelby
  79. adult education

    How educational and career goals different? How are they the same? Why is it essential to set educational and career goals>

    asked by keisha
  80. physics

    A car traveling 72.0 km/h along a straight, level road is brought uniformly to a stop in a distance of 40.0 m. If the car weighs 8.8 x 103 N, what is the braking force?

    asked by Madeline
  81. physics

    A car traveling 72.0 km/h along a straight, level road is brought uniformly to a stop in a distance of 40.0 m. If the car weighs 8.8 x 103 N, what is the braking force?

    asked by Madeline
  82. physics

    A block of wood is moved by a man with a force of 150 N from place A to place B with a uniform velocity of 1.2 m/s. The time taken by him in this process is 30 s.

    asked by shalini
  83. Physics-Please help with formula

    If you were in a rotor style ride and the riders accelerate until the speed of ride is reached- if the radius of the cylinder is 5.0m and the coefficient of friction between clothes and wall is 0.5, how do you find minimum speed you would need to stick to

    asked by Joey
  84. Help Chemistry

    Can you please tell me if these are right? Determine the pH for the following solutions A [OH-] = 1.0 X 10^-7 M I got 7 B. [H3O+ = 4.2 X 10 ^-3M I got 2.4 C. [H3O+]= 0.0001M I got 4 D. [OH-] = 8.5 X10^-9M I got 5.9 What are the [H3O+] and [OH-] for a

    asked by Jessica
  85. ipc

    A sailboat is traveling at a steady speed of 13 mph. The force of the wind pushing against the sail is _______ the opposing force of the water resistance.

    asked by eddie
  86. PHYSICS

    A stationary horn emits a 135-Hz tone. What frequency is heard by a passenger on a train which is moving towards this horn with a speed of 31.3 m/s?

    asked by aok
  87. physics

    A train on one track moves in the same direction as a second train on the adjacent track. The first train, which is ahead of the second train and moves with a speed of 31.3 m/s, blows a horn whose frequency is 124 Hz. If the frequency heard on the second

    asked by aok
  88. physics

    A horizontal pipe contains water at a pressure of 108 kPa flowing with a speed of 1.5 m/s. The pipe narrows to one-half its original diameter. What are the speed and the pressure of the water when the pipe narrows?

    asked by aok
  89. physics

    A water tank springs a leak. Find the speed of water emerging from the hole if the leak is 2.5 m below the surface of the water, which is open to the atmosphere.

    asked by aok
  90. physics

    Suppose 560.0 J of heat is added to a 111-g piece of aluminum at 23.0° C. What is the final temperature of the aluminum?

    asked by aok
  91. english

    The essayist's role is to a. study a subject from various points of view. b. put together a believable plot. c. present an accurate account of an event. d. ridicule those who disagree with his or her opinions. A?

    asked by Lily
  92. physics

    A strong man from the circus is being driven in a car which is moving at a constant speed of 5km/h. He decides he will test his strength by trying to stop the car so he pushes on the seat as hard as he can in the direction opposite to the motion of the

    asked by Anonymous
  93. algebra

    Find the value of this expression. 2/7 times 42/45 plus 2/5 times 11/3

    asked by nique
  94. math

    Consumers pay for electricity by the kilowatt-hour (the amount of electricity used by a 1,000-watt appliance in one hour). If electricity costs 10cents per kilowatt-hour, what is the cost of running a 100-watt lamp for 1. 1 hour? 2. 24 hours? 3. 1 year?

    asked by Mike
  95. math

    If the numerical values of the perimeter and the area of a square are equal, what are the dimentions of the square?

    asked by Steve
  96. interior decorating

    historically, who influencedthe style and trends of art, architecture, furniture and fashion? a. interior designers b. upper class c. architects d. artists

    asked by ericka
  97. chemistry

    A solution of acetic acid, CH3COOH, has a concentration of 0.201 M and a density of 1.00 g mL-1. What is the molality of this solution?

    asked by austin
  98. social studies

    Give an explanation on how the Unite State was founded

    asked by Gloria
  99. Social Studies

    Name one person and talk about their culture from Europe

    asked by Gloria
  100. Chemistry

    why do isomers have different properties? please give examples.

    asked by Maria
  101. Social Studies

    Name one person from the unite state and talk about their culture

    asked by Gloria
  102. Social Studies

    Explain briefly the people and their culture. 1. Africa 2. Asian 3. South Pacific

    asked by Gloria
  103. math

    Not sure how to answer this m(

    asked by m
  104. math

    Solve. 2-8x=22

    asked by JESSICA
  105. physics

    A hockey puck sliding on the ice with velocity 10m/sec is stopped by a goalie in 0.10sec. what is the goalie stopping distance ∆x in doing so.

    asked by Ama
  106. math

    5x/5=-3x/8+1

    asked by JESSICA
  107. physics

    A model rocket is launched with an initial velocity of 10 m/sec at an angle of 45° to the ground. What is the total time of flight? What is the highest point in its trajectory? What is the horizontal range archieved?

    asked by Ama
  108. physics

    If a particle goes from location Xi = 10i + 5j + 2k to location Xf = 15i – 7j + 10k in a time ∆t = 5 sec. what is the average velocity and average speed of the particle?

    asked by Ama
  109. Marketing

    What is the relationship between channels of distribution and logistics? How does geographical location affect your selection of distribution channels? Give an example of a company that needs both a physical location and an online presence. How do they

    asked by Sarah
  110. 6th grade

    for a frequency table what is the best interval for the data 1,14,6, 8, 10, 12, 15, 22, ans 25

    asked by shariff
  111. Physics: Waves in Media

    By how many decibels does the sound intensity from a point source decrease if you increase the distance to it by a factor 6?

    asked by Amanda
  112. government

    what is something i would find on commissioners court AGenda and not in city council court agenda?

    asked by jen
  113. Chemistry

    Gravimetric analysis does not always involve a precipitate. Consider the following problem. A mixture of calcium carbonate and calium oxide has a mass of 8.35 grams. When heated strongly, the CaCO3 in the sample decomposes into solid CaO and carbon dioxide

    asked by Josh
  114. Chemistry

    Co-precipitation is the process by which undesirable materials are "carried down" and trapped on the suface or within the desired precitate. The precipitate is washed with distilled water to remove the co-precipitates which are more soluble that the

    asked by Patrick
  115. math

    We have a circle that has 270 degrees listed outside the circle at the top left. Inside the circle at the bottom right side is a an angle inside the circle with a P. Find the measure of Angle P. Would this be that we take 360-270 to get the measure of

    asked by m
  116. MATH

    Katie must take five exams in a math class. Her scores on the first four exams were 68, 66, 82, and 80. Answer the following questions: The maximum score on an exam is 100 points. If it is not possible for Katie to achieve the required score on the exam,

    asked by LILO
  117. MATH

    Which of the following normal distributions has the smallest spread? A. A normal distribution with mean 1 and standard deviation 3 B. A normal distribution with mean 0 and standard deviation 2 C. A normal distribution with mean 3 and standard deviation 2

    asked by KARINA
  118. Chemistry

    What is the molecular weight of a gas if a 21.0g sample has a pressure of 836mm Hg at 25.0 degrees C in a 2.00L flash?

    asked by Shirley
  119. math help

    Suppose you are managing 25 employees, and you need to form three teams to work on three different projects. Assume that all employees will work on exactly one team. Also, each employee has the same qualifications/skills, so any employee can serve on any

    asked by aileen
  120. Chem for final, please help!

    How many moles of H+(aq) ions are present in 1.25 L of 0.75M Nitric Acid? A. 0.60 mol B. 0.75 mol C. 0.94 mol D. 1.7 mol E. 1.9 mol Please show me how to work this!

    asked by lavonne
  121. physics

    A diver runs horizontally off the end of a diving board with an initial speed of 1.75 sec. If the diving board is 3.0 m above the water line, what is the diver’s speed just before she enters the water?

    asked by Ama
  122. statistics

    . Do students at various universities differ in how sociable they are? Twenty-five students were randomly selected from each of three universities in a region and were asked to report on the amount of time they spent socializing each day with other

    asked by Anonymous
  123. Physics

    The A string of a violin is 31 cm long between fixed points with a fundamental frequency of 440 Hz and a mass per unit length of 5.8×10^−4 kg/m. What are the wave speed in the string? What are the tension in the string? What is the length of the tube of

    asked by Jake
  124. Physics

    A 60 dB sound wave strikes an eardrum whose area is 4.1×10^−5 m^2. How much energy is absorbed by the eardrum per second? At this rate, how long would it take your eardrum to receive a total energy of 4.6 J?

    asked by Eden
  125. Math

    The problem tells us to approximate the integral using the midpoint rule. n=5, sin(x)2 dx 0 to 1. I understand that the answer is .2(sin(.1)^2 + sin(.3)^...). When I use my calculator to get the decimal answer, I cannot get the same answer the book has. I

    asked by Judy
  126. 10th grade

    2x-y=-5 -2x-5y=11

    asked by star
  127. Pre cal

    Find the area of a triangle with sides of 12, 14 and 20

    asked by Keiven
  128. COLLEGE CHEMISTRY

    THE EQUILIBRIUM CONSTANT FOR A REACTION IS 2.48 AT 25 DEGREES CELSIUS. WHAT IS THE VALUE OF ΔG°(KJ)AT THIS TEMPERATURE? (R=8.314 J/K mol)

    asked by SHANICE
  129. physics

    The displacement from the equilibrium caused by a wave on a string is given by: y(x, t) = (-0.00200 m) sin [40 m-1)x – (800 s-1)t]. What are the number of waves in 1 m

    asked by Madeline
  130. Please Help CHEM

    Can you please tell me if these are right? Determine the pH for the following solutions A [OH-] = 1.0 X 10^-7 M I got 7 B. [H3O+ = 4.2 X 10 ^-3M I got 2.4 C. [H3O+]= 0.0001M I got 4 D. [OH-] = 8.5 X10^-9M I got 5.9 What are the [H3O+] and [OH-] for a

    asked by Jessica
  131. math

    Which quadrilaterals have a)perpendicular diagonals b)opposite angles congruent? c) two pairs of parallel sides? d) a pair of congruent, adjacent sides? My answers a)rhombus and square b)rhombus, square, and parallelogram c)parallelogram, rectangle, and

    asked by m
  132. science- chemistry

    How much energy in kilojoules is needed to heat 5.00 g of ice from -10.0 C to 30.0 C ?

    asked by allie
  133. Calculate Osmotic Pressure

    69.7 grams of a solute with a molecular mass of 2790 grams are dissolved in enough water to make 1.00 dm3 of solution at 20 degrees C. What is the osmotic pressure of the soluton?

    asked by Jose Reyes
  134. MAT 110

    How many milliliters of a 25% solution contain 10 g of the pure drug?

    asked by Vickie
  135. Economics for Manager

    Hello, Could someone please help me find the answer to this question: The two largest diner chains in Kansas compete for weekday breakfast consumers. The two chains, Golden Inn and Village Diner, each offer weekday breakfast customer a “breakfast club”

    asked by Daniel
  136. INTRODUCTION TO COMPUTERS

    The Internet may best be compared to a(n) A. large network of roads. B. series of colored lights. C. loud truck motor. D. enormous skyscraper.

    asked by Anonymous
  137. Chemistry

    WHAT IS THE BOILING POINT OF THIS SOLUTION? 1.00x10^2g C10,H8,O6,S2 (1,5-naphthalenedisulfonic acid) in 1.00x10^2g H2O (nonionizing solute)

    asked by Jose Reyes
  138. English

    Hello. I wonder if English has certain rules concerning word division (I mean when there isn't enough space for a word on the line (or-ga-nize). I will appreciate it if you give a reference (if any)to this material. Thank you for all your detailed answers.

    asked by Ilma
  139. Chemistry

    WHAT IS THE FREEZING POINT OF THIS SOLUTION? 25.5g C7,H11,N,O7,S(4-nitro-2-toluenesulfonic acid dihydrate) in 1.00x10^2g H2O(nonionizing solute)

    asked by Jose Reyes
  140. Chemistry

    WHAT IS THE BOILING POINT OF THIS SOLUTION? 25.5g C7,H11,N,O7,S(4-nitro-2-toluenesulfonic acid dihydrate) in 1.00x10^2g H2O(nonionizing solute)

    asked by Jose Reyes
  141. Math

    In a survey of 204 people, the following incomplete information was recorded relating gender to color-blindness: Complete the table on a separate sheet of paper, then complete Parts (a) - (d). There are no required fill-ins within the table. Color-Blind

    asked by Jenia
  142. English

    Sunlight hits the solar cells on the backpack. (Can we use reaches instead of 'hits' in this sentence?)

    asked by rfvv
  143. Micro Economic Theory

    How do you find the budget constraint given the utility function u = q1^(1/3) + q2

    asked by Terri
  144. calculus

    use the graph of f(x) in the graph to find the sign (positive or negative) of dy/dx and d2y/d2x at the points A,B,C, and D

    asked by Anonymous
  145. Computers

    I tried to use Google Video Uploader. However, I was not able to log in. I entered my e-mail address and then I entered the pass word, but it didn't work. Many times I tried to log on, but failed. How can I use the Google video Uploader? Would you let me

    asked by rfvv
  146. Physics

    if a 120-g mass is placed at the 25-cm mark and a 25-g mass at the 10-cm mark, where should a 500-g mass be placed to balance the system?

    asked by Megan
  147. Chemistry

    How do I calculate the thckness of tin if I am only given the density which is 7.28grams

    asked by Anonymous
  148. Chemistry

    How do I calculate the thckness of tin if I am only given the density which is 7.28grams

    asked by Anonymous
  149. statistics

    Hello. I recently had this question on my Midterm "Suppose the number of students coming to Thomas’s Monday office hours follows a Poisson distribution with mean 5. Further suppose that 30% of these students wear glasses. What is the probability that for

    asked by Anna
  150. excluded values

    excluded value of: 12m²n/24mn³

    asked by Cici
  151. Physics

    A piano string having a mass per unit length equal to 5.00 „e 10¡V3 kg/m is under a tension of 1 350 N. Find the speed with which a wave travels on this string.

    asked by Cf
  152. chemistry

    2 NO(g) + 1 O2(g) 2 NO2(g) Calculate K, the equilibrium constant, from thermodynamic data at 289 K. (Hint #1: Assume that S and H do not change with temperature.)

    asked by Anonymous
  153. Chemistry

    If all of the energy from a 60-watt bulb was put into 1 gram of water at room temperature for 2 seconds, how much would the temperature of the water increase?

    asked by Karmelo
  154. Physics

    When a mass-spring system oscillates with a small amplitude of A1, it has a period of 1.0 s. If the system is then made to oscillate with a larger amplitude of A2 = 2*A1, what is the new period? Thanks!

    asked by Linda
  155. arithmetic

    2. Find the general term and 25th term of the sequences c) 15, 13, 11, 9 ...

    asked by helen
  156. 9th grade

    at 20 degrees celsius, how much sodium chloride could be dissolved in 2 L of water?

    asked by megan
  157. Physics 40

    A pendulum bob of mass M1 oscillates with a period of 1.0 s. If the length of the pendulum remains the same, but the pendulum bob is replaced with another one of mass M2 = 2*M1, what is the new period? I need help.

    asked by Jennifer
  158. Math

    Find the only four-digit perfect square that is a pair of two-digit squares written side by side?

    asked by Jay
  159. Chemistry-Help!!!

    How many grams of chloride ions are in 2.5L of a 1.0 M calcium chloride solution?

    asked by Beth
  160. Chemistry-Confused!!

    You have 10mL of a 1.0 M Ba(OH)2 solution and add it to 2.5L of water. What is the concentration of hydroxide ions in the diluted Ba(OH)2 solution?

    asked by Madison
  161. Math hw help

    Four candidates, Allen (A), Bryant (B), Chula (C) and Ditka (D), are running for president of a club. The club uses a "First/Second/Third" ranking system. After the polls close, votes are tallied and the following results are obtained ranking 3565 1655 478

    asked by Jenia
  162. analogys

    dream is to wish as goal is to ******* receive is to request as find is to******

    asked by dog girl
  163. physics

    This refers to passive solar collector, where solar radiation is used to heat water. It is therefore not on the solar cells. What characteristics should solar collectors have, to function in an optimal way? Why should these properties be fulfilled? If

    asked by bark
  164. physics

    a 2191 kg car moving east at 9.9 m/s collides with a 3221 kg car moving north. the cars stick together and move as a unit after the collision, at an angle of 37.5 north of east at a speed of 5.05 m/s. what is the speed of the 3221 kg car before the

    asked by jacquie
  165. Physics-Please check

    I posted this question this morning but I'm not sure of the response Damon provided. If you were in a rotor style ride and the riders accelerate until the speed of ride is reached- if the radius of the cylinder is 5.0m and the coefficient of friction

    asked by Joey
  166. physics

    a 2191 kg car moving east at 9.9 m/s collides with a 3221 kg car moving north. the cars stick together and move as a unit after the collision, at an angle of 37.5 north of east at a speed of 5.05 m/s. what is the speed of the 3221 kg car before the

    asked by jacquie
  167. Calculus

    Find the slope of the tangent line to the curve at (2,1) x/y + x^2y^2 = 6

    asked by Prater
  168. Physics

    Have 2 identical cars each 1000kg at a speed of 20m/s. The yellow car is stopped by car's brakes in 25m while green car is stopped by concrete barrier in 1.2m. Drivers have same mass(70kg) Driver of yellow car is stopped by seatbelt in 0.150 sec. Compare

    asked by Annie
  169. bio 102

    assuming the standard values for the atmospheric partial pressure of N2, O2, AND CO2 at sea level, what is the approximate total partial pressure of the remainig atmospheric gases?

    asked by bob
  170. Geometry

    The area of a triangle is 6.75 m squared. If the base of the triangle is 3 m, what is the height of the triangle?

    asked by Mark
  171. English

    Sunlight hits the solar cells on the backpack. The solar cells change sunlight into electricity. The electricity is stored in the battery. A cell phone or an MP3 player can be plugged into it. (In this passage, what does 'it' refer to in the last

    asked by rfvv
  172. physics

    a 4 kg object moving with a speed of 7.8 m/s collides with a 16 kg object moving with a velocity of 7.6 m/s in a direction of 22 degrees from the initial direction of motion the 4 kg object. what is the speed of the two objects after the collision if they

    asked by jacquie
  173. 5th grade

    how much would a trapizoid worth if the triangle eqauls 1/3

    asked by Alex
  174. english

    What are the adjectives in this sentence? A giant sequoyia is ancient.

    asked by kaye
  175. English

    a living thing which grows in earth: plant (What does "in earth" mean? Does it mean under the ground or on the ground?)

    asked by rfvv
  176. Physics

    I need help solving for q. Here is the formula. F=(k*q*2q)/r^2

    asked by Bob
  177. algebra

    1. 100x^2-9 2. 8x^2+14x+6

    asked by mike
  178. Algebra

    The points L(4, 0),M(10, 0), and N(7, 5) form LMN.What is the sum of the slopes of the three sides of the triangle?

    asked by Raylon
  179. university of phoenix

    I need 700 words explaining what your point of view will be and what plan to accomplish in your paper

    asked by jacqueline howard
  180. Alg I

    Three towns A, B, and C lie on a straight road in that order.The distance from B to C is 6 miles more than twice the distance from A to B.The distance from A to C is 2 miles more than four times the distance from A to B.What is the distance from A to B?

    asked by Jensen
  181. algebra

    P(1, 3) and R(5, 5) are the endpoints of a diagonal of the rectangle PQRS. Which sides of the rectangle are parallel to the x-axis? To the y-axis? What is the perimeter of the rectangle?

    asked by Patrick
  182. History quick question

    Did people back in the 1700's use financial aid/assistance.?

    asked by rachel
  183. Chemistry

    You know the solution forms a precipitate when? (A) when it changes color (B) when you can’t see through it (C) because it bubbles (D) you have stirred it for more than 5 minutes (E) the solution thickens

    asked by Ivy
  184. Chemistry

    A 21.18 mL of 0.250 M NaOH is titrated with a H2SO4 solution. The initial volume of H2SO4 was 13.28 and the final volume of H2SO4 was 28.29 mL when the solution turned very slightly pink. What is the concentration of H2SO4?

    asked by Ivy
  185. Chemistry

    Which is not a ground state electron configuration? A. 1s2 B. 1s2 2p1 C. 1s2 2s2 D. 1s2 2s2 2p1

    asked by Ivy
  186. Chemistry

    As one descends group 6A of the periodic table, the number of valence electrons found in each element? A. Increases B. Decreases C. Remains the same

    asked by Ivy
  187. accounting

    Does the flexible budget term mean A series of budgets for varying rates of activity?

    asked by jack
  188. algebra 1

    I need someone to help me fiqure this equation out and then explain how you got the answer. x + 7/10 = -1/5

    asked by robbie
  189. HIS 135

    Interview someone who remembers the Watergate scandal and Nixon’s impeachment and resignation. (Family members, friends, co-workers). Ask the following questions to the person you are interviewing: - How old were you at the time of the Watergate scandal?

    asked by Pam
  190. math

    a bag has 6 marables in it.each marable is either red,blue,or green. what is the least number of marables that you must pull out of the bag to be sure you have 2 marables the same color.

    asked by cindy
  191. science

    why are green plants important to humans?

    asked by julian
  192. physics

    At the local grocery store, you push a 13.9 kg shopping cart. You stop for a moment to add a bag of dog food to your cart. With a force of 12.0 N, you accelerate the cart from rest through a distance of 2.00 m in 3.00 s. What was the mass of the dog food?

    asked by suts
  193. math

    jhon needs to bulid a fence around his yard , which is 96 ft. wide and 120 ft. deep. A.how much fence mst he buy to enclose all four sides?answer: B .if the fence cost$12.87 for an 8 ft. length, how much will the entirefence cost befor the tax is added?

    asked by cindy
  194. math

    the seasonal operating cost in dollars per square meter of grain bed for such a dryer consists of the cost of heating the air. heating cost=0,002Q(delta T) and blower operating cost Blower cost=2.6^(10^-9)Q^3 where Q= air quantity deliverd through the bed

    asked by Alicia
  195. statistics

    An Urn contains 7 red and 3 white balls. Two balls are drawn in succession without replacement. If the second ball is white, what is the probability that the first ball was white?

    asked by Emily
  196. math

    what whole number does N stand for if the number sentence bleow is true? [N+5]+[3 times 2]=18

    asked by cindy
  197. algebra 1

    Hi Ms. Sue can you tell me how you got 2/10 in the equation that I submited a few min. ago the equation was, x + 7/10 = - 1/5

    asked by robbie
  198. algebra

    The natural stride up a certain staircase has a slope of 3/5, meaning that a run of 5 inches has a rise of 3 inches. The model for a standard staircase is y=(3/5)x Find the rise for a staircase constructed at a mansion which has a run of 12 inches. Not

    asked by chris
  199. Spanish

    14. Voy a comprar tenis nuevos en ___________. a. el joven b. los zapatos c. la zapateriá d. el gimnasio Not sure... 15. ¿De quién es ______ suéter? a. este b. esta c. su d. esos Either A or B... Thanks -MC

    asked by mysterychicken
  200. math

    franklin school has 3 boys for every 4 4 girls in fifth grade . there were 140 students in the fifth grade. A.how many are boys B.how many are gorls

    asked by cindy
  201. Pre Alg.

    How do you figuer H/9.6=5/12?

    asked by Lorie
  202. algebra 1

    Hi Ms. Sue again, I hate to be a pest but how did you get the two in 2/10, I am really brain dead today.

    asked by robbie
  203. physics

    suppose that a horizontal force of 0.7 n is required to pull a 5.0 kg block across the table at constant speed. what is the initial speed of a 20 g bullet, fired horizontally into the block, if the bullet imbeds in the initially stationary block and causes

    asked by ashley
  204. math

    the store were janice and kanisha shop is having a sale on summer clothes.each of the girls want to buy 2 pairs of shorts and three tops.if shorts and tops are on sale for $11.50 each, what is the best estimate of how each girl wold spend?circle answer

    asked by cindy
  205. lan systems

    Post your response to the following: Explain what kind of network you are on at work or at home. If you do not have access to a network, ask a friend or family member to explain the type of network they have access to. What benefits does the network

    asked by Anonymous
  206. Chemistry-Help!!

    If I have 10mL of 1.0 M Ba(OH)2 solution and add it to 2.5L of water. What is the concentration of hydroxide ions in the diluted Ba(OH)2 solution?

    asked by Madison
  207. Chemistry

    How many molecules are in 15g CH4? How do you figure this out?

    asked by Lauren K.
  208. 12th grade

    A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.65 104 m/s, and the radius of the orbit is 5.30 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite has

    asked by Anonymous
  209. physics

    In a tennis serve, a 0.070 kg ball can be accelerated from rest to 35 m/sec over a distance of 0.80 m. find the magnitude of the average force exerted by the racket on the ball during the serve

    asked by Kay
  210. physics

    A model rocket is launched with an initial velocity of 10 m/sec at an angle of 45° to the ground. What is the total time of flight? What is the highest point in its trajectory? What is the horizontal range achieved?

    asked by Kay
  211. physics

    Two masses m1 and m2 are suspended from the ceiling by two string segments. What is the tension in each string segment? Let m1 = 10 kg and m2 = 20 kg.

    asked by Kay
  212. math

    the regular season for professinal baseball is 162 games.a player was bat in each game ,and he played in 2/3 timesof the game. a. how many times was the player at bat during the season? b.the player hit 0.250,which means he got a hit 25% of the time,or oce

    asked by cindy
  213. math

    a circular pool has a radius of 8 ft. what is the longest distance a swimmer can swim without making a turn?

    asked by Anonymous
  214. Industrial Hygiene

    How much vinyl chloride is needed to fill a tank of 250 liter with a 13.5 solution?

    asked by Don
  215. algebra

    4(3-u)+u=22+2u what does u equal?

    asked by haley
  216. reading

    need help to unscramble compound words

    asked by aniah
  217. chemistry

    25.00 mL of a 2.00 M solution of NaCl is diluted to a final volume of 100.0 mL. What is the concentration of NaCl in the final solution?

    asked by Lia
  218. physics

    5. A truck is travelling at a constant velocity of 16.7 m/s. A pumpkin is shot vertically (at a 90o angle to the ground)at a velocity of 120. m/s from the bed of a this pickup truck. The bed of the pickup truck is one meter high (from the ground). Complete

    asked by Alex
  219. math

    HOW CAN YOU REMOVE ONE OF THE NUMBERS FROM 68 AND HAVE 18 LEFT?

    asked by JoAnn
  220. chemistry

    2 Na202 + 2H20 -> 4NaOH + 02 When 200.g of Na202 were reacted, 32.0 g of 02 were collected. The yield of 02 collected was (how many percentages)

    asked by andy
  221. science

    convert 270g to moles

    asked by wilson
  222. marketing

    In what stage of the product life cycle is cake mix in the U.S.?

    asked by Randa
  223. Childcare Mangment

    i have 2 questions 13. Following the nutritional label on a jar of peanut butter, you determine that 1 ounce of the peanut butter contains 115 calories and 9 grams of fat. What percent of the calories come from fat? A. 30 C. 70 B. 40 D. 80 i think is B 5.

    asked by Brenda
  224. physics

    A 3 kg ball is thrown horizontally off a 78.5 m cliff with a speed of 12 m/s. How long does the ball stay in the air?

    asked by Audie
  225. physics

    A 3 kg ball is thrown horizontally off a 78.5 m cliff with a speed of 12 m/s. How long does the ball stay in the air?

    asked by Audie
  226. Physics-Please check if I did this correctly

    I posted this question this morning but I'm not sure of the response Damon provided. I did it once but then I updated it later in this at the bottom- please check booth of my answers. If you were in a rotor style ride and the riders accelerate until the

    asked by Joey
  227. 12th grade

    How many moles are in 8.8*10 to the 34

    asked by yuo
  228. Physics

    Have 2 identical cars each 1000kg at a speed of 20m/s. The yellow car is stopped by car's brakes in 25m while green car is stopped by concrete barrier in 1.2m. Drivers have same mass(70kg) Driver of yellow car is stopped by seatbelt in 0.150 sec. Compare

    asked by Annie
  229. math

    How do you multiply -3/5 by -3 and write it as an improper fraction?

    asked by Alice
  230. physics

    A block lies on a smooth plane tilted at an angle è = 28.5° to the horizontal. Ignore friction. (a) Determine the acceleration of the block as it slides down the plane. 1 m/s2 (b) If the block starts from rest 9.40 m up the plane from its base, what will

    asked by An
  231. spanish

    how do you say "i need help now" in spanish

    asked by crystal
  232. algebra

    the length of a pool is 30 meters greater than the width. if the area is 1000 square meters, find the dimensions of the pool.

    asked by mike
  233. math

    George ran 3/8 mile on Sunday and 2/8 mile on monday. How much farther did george run on sunday than on monday?

    asked by areonna
  234. math

    Billy goes to soccer at 12:49 he ends at 3:45 ..... how many minutes or hours is soccer practice

    asked by olive
  235. MATH

    N X 15 N=20,25,30 HOW DO YOU EVALUATE THE EXPRESSION FOR EACH VALUE OF N

    asked by Kristy
  236. english

    In Peace Like a River by Leif Enger how are Jape Waltzer and Davy Land similar and different?

    asked by kelly
  237. Math

    If a wall is 6th tall and a ladder is leaning against it. The ladder is 8th tall, how far apart is is the base of the ladder away from the wall?

    asked by Tiara
  238. algebra

    Find a pair of complementary angles such that the difference of their measures is 12 degrees.

    asked by Northeast Middle School
  239. business

    Need a web site on if the International Court of Justice was the first world court and what are the procedures of the world court?

    asked by TONJA
  240. English

    Hello. Will you please help me with the following: 1)Which article is to be used in "This event caused a/the exodus of British citizens." 2)Is "get acquainted with" possible with inanimate nouns (facts, situation, idea, concept)? 3)Is it possible to say

    asked by Ilma
  241. 7th grade

    4 reasons europeans came to the coloines

    asked by Anonymous
  242. Social Studies

    i need help on some questions first question: What does the democratic government provide to the country hope you can help me please and thank you

    asked by Need Help!
  243. 11th grade

    a yo-yo has a mass of 0.20kg and i attached to a string 0.8m long. what isthe velocity of the yo-yo?

    asked by Anonymous
  244. algerba..plz help

    A 400 g solution is 25% salt. How much salt must be added to produce a solution that is 40% salt?

    asked by abc
  245. algebra

    what three digit number is less than 300 and the ones digit is 4 times the hundreds digit and the tens digit is 5 more than the hundreds digit and the sum of the digits is 17

    asked by Karen Nelson
  246. Math

    Calculate the monthly payment by loan amortization table Loan $26,000 Down payment $5,000 11% 36 Months

    asked by Debby
  247. advance language arts

    base: abase:: prolific:soporific mobile:immobile parley:parliament fortification:fortify CAN ANYONE HELP??

    asked by irene
  248. Chemistry

    What is the theoretical justifaction for the order of reaction rates of a cycloalkane, cycloalkene, and benzene?

    asked by Olivia
  249. physics

    A 0.480 kg pendulum bob passes through the lowest part of its path at a speed of 3.10 m/s. (b) When the pendulum reaches its highest point, what angle does the cable make with the vertical? The cable of the pendulum is 80 cm or .8m.

    asked by kaitlyn
  250. MATH

    If the corresponding angles of 2 polygons are congruent and the lengths of the corresponding sides of the polygons are proportional, the polygons are... a. Regular b. Congruent. c. Symmetric d. Similar

    asked by Dobby
  251. 7th grade

    i need help in Math with Fractions can i have some pointer to remember it. P.s. Thank you guys if u can help

    asked by Mj
  252. spanish

    how do you say this sentence in spanish ..How much do you wiegh.

    asked by olive
  253. chemistry

    What is the density of CO2 gas at -25.2 degrees celsius and 98.0kPa?

    asked by lavonne
  254. chemistry

    A sample of ammonina gas at 65.5 degrees celsius and 524 torr has avolume of 15.31 L. What is it's volume at -15.8 degrees celsius and its pressure is 524 torr?

    asked by lavonne
  255. 5th grade

    compkete the pattern 25____61____97

    asked by johnathan
  256. physics

    a child twirls a yo-yo about in a horizontal circle. The yo-yo has a mass of 0.20 kg and is attached to a string 0.8 m long. what is the velocity of the yo-yo? thanks!

    asked by i neeeeed helpp!!
  257. physics

    the maximum height a typical person can jump from a crouched start is about 60cm. By how much does the gravitational potential energy increase for a 72kg person in such a jump? Where does this energy come from? I know the formula for gravitational

    asked by physics
  258. 8th grade math

    Matt has twice as many quarters as dimes in his coin collection. If the dimes and quarters together total $9.00 how many of each kind of coin does he have?

    asked by Anonymous
  259. 12th grade

    What is the thesis of how would Bryan evaluate the ambitions of Albert Beveridge?

    asked by fatou faye
  260. Social Studies Urgent

    what freedoms does the people have when the country is run under a socialist government please and thank you

    asked by Need Help!
  261. social studies

    In world war ll did hitler die in his bunker?

    asked by olive
  262. Physics

    At t = 0, a 785 g mass at rest on the end of a horizontal spring (k = 125 N/m) is struck by a hammer, which gives the mass an initial speed of 2.70 m/s. (a) Determine the period of the motion. T= .4979201367s Determine the frequency of the motion. f=

    asked by Anon
  263. music

    In a round with 4 people singing Jingle bell rock who would end last if person 1 and 2 start at the same time then person 3 is next then person 4 is last?

    asked by olivia
  264. physics

    A 0.480 kg pendulum bob passes through the lowest part of its path at a speed of 3.10 m/s. (b) When the pendulum reaches its highest point, what angle does the cable make with the vertical? The cable of the pendulum is 80 cm or .8m.

    asked by kaitlyn
  265. social studies

    Did someone kill Hitler in world war ll?

    asked by olive
  266. english

    I am i stupid?

    asked by Anonymous
  267. Physics-Please help

    Have 2 identical cars each 1000kg at a speed of 20m/s. The yellow car is stopped by car's brakes in 25m while green car is stopped by concrete barrier in 1.2m. Drivers have same mass(70kg) Driver of yellow car is stopped by seatbelt in 0.150 sec. Compare

    asked by Annie
  268. Math

    If the length of a rectangle is x - 5 and the area is 4x(exponent2) - 12x +9, what is the width?

    asked by Jay
  269. Physics

    posted this question this morning but I'm not sure of the response Damon provided. I did it once but then I updated it later in this at the bottom- please check booth of my answers. If you were in a rotor style ride and the riders accelerate until the

    asked by Joey
  270. stastics

    johns runs a computer software store.he counted 128 people who walkrd by his store in a day , 60 of whom came into the store, of the 60 only 21 brought something in the store.estimate the prob that that a person who walks by the storeenter the store .round

    asked by gaio
  271. science

    How to write 5,800 million metric tons in standard form and in scientific notation?

    asked by Robert
  272. statistics

    the quality control inspector of a production plant will reflect a batch of syringes if two or more defectives syringes are found in a random sample of ten syringes taken from the batch of two percent defective syringes.what is the probability that the

    asked by gaio
  273. Math 7th

    Mrs.Flores bought 5 pounds of cheese. He used 2 1/4 pounds for cheese spread. 1 3/4 pounds for nachos and the rest for sandwhichs. Write a procedue that could be used to find the number of pounds of cheese he used for sandwhiches

    asked by Danny
  274. algebra 2

    A flagpole at a right angle to the horizontal is located on a slope that makes an angle of 12 degrees with the horizontal. The pole's shadow is 16 meters long and points directly up to the slope. The angle of elevation of the sun is 20 degrees. Draw the

    asked by katie
  275. math

    if possible, change each comparison of concentrate to water into a ratio. If not, explain why. a. the mix is 60% concentrate. b. the fraction of the mix that is water is 3/5 c. the difference between the amount of concentrate and water is 4 cups

    asked by Jack
  276. math

    Sum of a 3 digit # is 24. Ones digit is 2 more than 2xs the hundred dig. Tens dig is 1 more thn 3xs the hund dig. Wats the #??

    asked by andy
  277. science

    How to write 5,800 million metric tons in standard form and in scientific notation?

    asked by Robert
  278. MATH

    Which of the following has 2 parallel bases that are not polygons? a. Cone b. Prism c. Pyramid d. Cylinder

    asked by Dobby
  279. Psychology

    The question is true or false. Language that elicits defensiveness usually involves giving both individuals equal power. I know that when you remove defensiveness then there is equal power, but I don't know what 'elicits' means in this sentence.

    asked by Avalon
  280. Calculus

    What is the linearization of f(x)=e^x at x=1?

    asked by Anna
  281. Algebra

    find the product of (x^2 - 3x + 5) with the quotient of (10x^6 - 15x^5 - 5x^3)

    asked by Mary Jo
  282. algebra

    50e-.367x=125

    asked by Anonymous
  283. Chemistry

    Which is not a ground state electron configuration? A. 1s2 B. 1s2 2p1 C. 1s2 2s2 D. 1s2 2s2 2p1

    asked by Jerome
  284. chemistry

    calculate the number of joules released when 175.0 grams of water are cooled from 100.0 to 27.5 celcius

    asked by Anonymous
  285. MATH

    The path of a large stone fired from a catapult can be modeled by y= -0.00545x^2+1.145x where x is the distance the stone traveled (in yards) and y is the height of the stone (in yards). 1. find the distance the stone traveled. 2. find the maximum height

    asked by Shannon
  286. Calculus

    If the volume of a cube is increasing at 24 in^3/min and the surface area of the cube is increasing at 12 in^2/min, what is the length of each edge of the cube? I know that dV/dt=24 and ds/ds=12. I also know that Volume=s^3 and Surface Area=6*s^2, but what

    asked by Anna
  287. Math 7th

    Mrs. Jones bought 3 1/2 pounds of ajita meat at $2.50 per pound, 1 3/4 pounds of pinto beans and a package of tortillas for $2.23. She gave the cashier 20.00. What other information is needed to find the correct change Mrs.Jones will receive?

    asked by Danny
  288. MATH urgent!!!

    My problem: From 1992 to 1996, the annual income for all the private golf courses in the United States can be approximated by the model: I=59t^2+2254, where I is the annual income in millions of dollars and t is the year, with t=0 corresponding to 1990. 1.

    asked by Shannon
  289. Calculus

    A particle is moving around the unit circle (the circle of radius 1 centered at the origin). At the point (.6 , .8), the particle has horizontal velocity dx/dt=3. What is its vertical velocity dy/dt at that point? I don't know what equation to use or

    asked by Anna
  290. grammar

    what the simple predicates male lion have shagy manes

    asked by sam
  291. physics

    Two stones of different masses are thrown straight upward one on earth and on the moon (where gravity produces an acceleration of 1.67m/second squared) Both reach the same height. if the stone on the moon has an initial speed v, what was the initial speed

    asked by first name
  292. College Chemistry Really Need Help

    THE EQUILIBRIUM CONSTANT FOR A REACTION IS 2.48 AT 25 DEGREES CELSIUS. WHAT IS THE VALUE OF ΔG°(KJ)AT THIS TEMPERATURE? (R=8.314 J/K mol)

    asked by KEVIN
  293. 2nd grade math

    It is greater than 7 tens and less than 8 tens. The number. Has 4 ones. Write the number word

    asked by Anonymous
  294. healthcare finance

    Suppose that a clinic has third-party payer revenues of $10,000 a day. On average, it takes the clinic 50 days to collect from its payers. What will be the steady state receivables balance? a. $ 10,000 b. $ 50,000 c. $250,000 d. $500,000 e. $750,000

    asked by tori
  295. 7th grade math

    9.8c + 8d - 4.6c + 2.9d simpilfy the expression

    asked by Daniel
  296. Chemistry

    A 50.0-mL sample of 0.10 M HNO2 is titrated with 0.10 M NaOH. What is the pH after 25.0 mL of NaOH have been added?

    asked by Eric
  297. Chemistry

    The volume of a balloon is 120L at 25 degrees celcius. What is it at 75 degrees celcius?

    asked by Damien
  298. Pre-Calc

    I am seeking help with this problem Please...Thank you! Find the point on the line y=x+3 in the xy-plane that is closest to the point (3, 2)

    asked by Roy
  299. math

    4/6 + 5/6 THEN MUITLP

    asked by sam
  300. English

    · Read two of the five paragraphs on the second page of this appendix. Write a brief paragraph of about 150 words in which you do the following: · o Identify which paragraph was more effective and analyze why this is so. o Include a discussion of

    asked by Jen
  301. Pre-Calc

    Can someone please be kind and show me the steps on this? Thanks Find the equation of the circle centered at the origin in the uv-plane that has twice the circumference of the circle whose equation equals (u-5)^2 + y^2 =9

    asked by Ann
  302. Physics

    A convex mirror with focal length of -20 cm forms an image 12 cm behind the surface. Where is the object located as measured from the surface?

    asked by Max
  303. algebra

    how do I figure out the formula for graphing of y=1/4x. I do not understand this at all

    asked by lettye
  304. english

    I need two examples where in the book Huckleberry finn. Huck doesn't believe in himself or he is having self doubt. does anyone know an example or two where this happens in the book? thanks

    asked by hannah
  305. CHOIR

    MY TEACHER WANTS US TO PRACTICE TO SINING BUT I LEFT MY MUICS ON THE BUS WHAT SHOULD I DO

    asked by sam
  306. math

    The net is 3 feet high. The distance from where the ball is hit to the net is 24 feet. Assume the ball travels in a straight line. At what height must a tennis ball be hit so that it will just pass over the net and land 21 feet away from the net on the

    asked by Chandler
  307. Math

    Kenneth works for albertsons as a cashier. He earns $9.25 per hours and he works 20 hours each week. Write an expression that could be used to determine his total earnings for 1 year

    asked by Matt
  308. Pre-calc

    Can someone please show me the steps to this problem...Thanks in advance. Let f(x) = Ð9xÐ. For the area above the x-axis and between the lines x= -9 and x=18 a. draw and label a sketch with the area shaded b. find the area of the region in the xy-plane

    asked by Amy
  309. SCOIL STUDIES

    WHAT WAS THE ALOMO LIKE

    asked by sam
  310. 6th grade

    explain how you would decide whether the product of three numbers is positive or negative

    asked by Anonymous
  311. Pre-CALC

    Can anyone help me with this problem step by step please... Find the area inside the ellipse in the xy-plane determined by the given equation x^2 y^2 ____ + ___ =1 10 25

    asked by Amy
  312. disease

    WHAT IS CANCER AND HOW DOES ITSTART

    asked by sam
  313. Chemistry

    An unlabeled bottle containing a solution was found in the lab. It contains one of the following: AgNo3, CaCl2, or Al2(SO4)3. Describe how you would test the solution to determine which solution it is. Include equations in your answer.

    asked by Abigal
  314. 6th grade

    What are some of the similarities between the Israelites and Mesopotomians?

    asked by Dyaln
  315. math

    ascuba diver is 180 ft below sea level and rises to the vsurface at a rate of 30 ft/min.How long will the diver take to reach the surface?

    asked by hobbies
  316. READING

    MY TEACHER SAID WE HAVE TO READ SHIOLH AND HAVE ONLY 1 WEEK WHAT TO DO ABOUT 16 CHARTER WHAT TO DO

    asked by sam
  317. pre algebra 6th grade

    Tara's bank account contains $250.00. She made only one deposit exactly one year ago. The bank account pays a simple interest rate of 8%. How much money did Tara deposit in the account one year ago?

    asked by Suzanne
  318. physics

    I have a capacitance of 5.75e-10 What is it in Farads?

    asked by Bob
  319. PHYSICS

    The rms speed of a sample of gas is increased by 8% . What is the percent change in the temperature of the gas? What is the percent change in the pressure of the gas, assuming its volume is held constant? PLEASE HELP

    asked by Christy
  320. Earth's Heat Resources

    list 3 examples of natural activities or events that carry thermal energy from within Earth directly to Earth's surface. I don't get what kinds of activities its referring to.

    asked by Sydney
  321. GRAMMAR

    WHATS A VERB

    asked by sam
  322. Math question

    I don't understand how to find the aproximate area of a shaded region This problem has a big cirlce with 1/4 shadded with a radius of 20 cm. the answer chocies are A. 90 cm squared B. 270 cm squared C. 314 cm squared D. 1.256 cm squared how do I find the

    asked by Anne
  323. ENGLISH

    Peace Like a River by Leif Enger HELP PLEASE!? In Peace Like a River by Leif Enger how are Jape Waltzer and Davy Land similar and different?

    asked by KELLY
  324. Earth's Heat Resources

    How is the energy that reaches earth's surface returned to space? is is by radiation?

    asked by Sydney
  325. chemistry

    what steps do i take when trying to figure out how many atoms of copper are contained in 1.15 moles of Cu?

    asked by ayzhanah
  326. Math

    Ellie has 22 coins that equal $3.85. What are the coins?

    asked by Trent
  327. chemistry

    Explain jhow you would make 400 milliliters of an 18% solution from dry glucose and distilled water.

    asked by juan
  328. Math

    An equilateral triangle s divided into 4 congruent equilateral triangles. What method can be used to find the area of the larger equilaterl triangle give the area of one of the smaller triangles? F. Multiply the area of the larger equilateral triangle by 4

    asked by Danny
  329. Physics

    While traveling to school at 27 m/s your car runs out of gas 15 hm from the nearest gas station. If the station is 16m above your current elevation, how fast will the car be going when it reaches the gas station? Ignore friction.

    asked by Ben
  330. Earth's Heat Sources

    most of earth's landmass is in the northern hemisphere. how might this influence Earth's overall albedo during a)June b)January I really don't get this question.

    asked by Sydney
  331. Geometry

    In an equilateral triangle, what is the difference between the sum of the exterior angles and the sum of the interior angles?

    asked by Alexis
  332. physics

    brandon launches a projectile at an angle of 75 degrees above the horizontal, which strikes the ground a certain distance down range. for what other angle of launch at the same speed would the projectile land just as far away?

    asked by sabina
  333. calculas

    if the length is decreasing at a rate of 2 in./min. while width is increasing at a rate of 2 in./min., what must be true about area of the rectangle

    asked by Anonymous
  334. math

    a roof is 2.5 feet vertically and 12.3 feet horizontally. what is the grade of the roof?

    asked by norma
  335. math help!

    bernardo folds the 2 top corners of a rectanglular piece of paper to form 2 conguent triangles and an isosceles trapezoid. The triangles each have an angle that measures 65. what are the measures of the 2 top angles in the trapezoid? a. 25 and 25 because

    asked by DeNawQisha
  336. math

    how do you explain how all triangles have lines of symmetry

    asked by iya
  337. Math

    Use lagrange multipliers to find the point on the plane x-2y 3z-14=0 that is closet to the origin?(try and minimize the square of the distance of a point (x,y,z) to the origin subject to the constraint that is on the plane) Help me please!

    asked by Justin
  338. economics

    what is the history on credit cards?

    asked by katie
  339. HEAT

    A container holds a quantity of liquid nitrogen at a temperature of -200 degrees C. Explain how each of the following could be used to warm up the nitrogen. a)ice cubes b)hot water bath c)bubbling room air through the liquid All these substances contain a

    asked by Sydney
  340. Physics

    A pendulum is constructed of a 6.7 gram mass suspended on a 55cm thread. The mass is displaced vertically 55 cm to a point exactly horizontal from the top of the thread and released. The mass swings down and is cut directly above the mass when the mass is

    asked by Hannah
  341. calculas

    find the perimeter of the rectangle with maximum area that can be inscribed in a semicircle of radius 2 ft. if two of its vertices are on the diameter of the semicircle and the other two are on the semicircle.

    asked by Anonymous
  342. Physics

    A convex mirror with focal length of -20 cm forms an image 12 cm behind the surface. Where is the object located as measured from the surface?

    asked by Max
  343. science

    how do you show staregy

    asked by sam
  344. calculas

    x and y are both variables that are differentiable with respect to t, but not to each other. however, there is a relationship between them: x^2=3y^2+7. we also know that x changes with respect to t at a steady rate of square root of 12 (dx/dt=x'= square

    asked by Anonymous
  345. Math

    Determine whether each general term defines a geometric sequence. Explain. a) f(n)= 2/(3n+1) b) f(n)= 11/(13^n)

    asked by Emily
  346. Math

    A string is cut in half,and one of the halves is used to bundle newspapers. Then one fifth of the remaining string is cut off. The piece left is 8 feet long. How long was the string originally? Please work this out. The anwser is 20 ft. THANKS

    asked by Melea
  347. MATH

    K we are learning about Linear Equations and Graphs. And I'm doing the Slope-point Form, but I'm kind of having troubles with it. Liek I don't really get how to change the slope point form to the slope intercept one. Here is an example: y-5 = -1/2(x+4) y-5

    asked by Alexa
  348. geometry

    if mBA=44 find the measure of mBA

    asked by emil
  349. Re:Social Studies Urgent

    socialist government: who is eligible to vote i've been searching this forever well most of all the socialist question need help on. please help and thank you

    asked by Need Help!
  350. Math

    Which of the following has 2 parallel bases that are not polygons? a. Cone b. Prism c. Pyramid d. Cylinder

    asked by SquarePants
  351. writting

    hoW do you righ a letter to A GAINT ALIEN THAT NEEDS SOARLAYS BUT TRaveliing anget said the moon

    asked by sam
  352. MATH

    Which of the following is NOT true? a. -3 > -8 b. -8 < -4 c. -8 < -9 d. -7 > -8

    asked by SquarePants
  353. world studies

    when & why did the cultures of Egpyt & Nubiabegin to mix?? plz help

    asked by Anonymous
  354. Calculus

    A rectangle is insribed between the parabolas y=4(x^2) and y=30-x^2. What is the maximum area of the rectangle? Domain: [-3,3] Range:[-2, 40] THANK YOU!

    asked by Anna
  355. chemistry

    Explain what is required to create a buffer that needs to protect the pH between 8.1 and 8.5

    asked by Ciara
  356. Social Studies Urgent

    under a socialist government, who make the decisions? can citizens take part in the decisions? or the government makes all the decisions please help and thank you

    asked by Need Help!
  357. chemistry pap

    How many atoms of lead (Pb) are present in 0.75 moles?

    asked by nicola
  358. Social

    Why is the Plain of Abraham such important event in Canada's history?

    asked by Florance
  359. Social Studies Urgent

    how do democratic governments and socialist governments maintain power? please help and thank you

    asked by Need Help!
  360. English

    1.Most clarinets (are, is) made of wood. 1.are

    asked by Hayden
  361. social studies 5thgrade

    Does the size of the planet affect the time it takes for one revolution around the Sun? The answer is No, but why is it because of the gracity pull from the Sun? Thank you

    asked by jill
  362. 6th grade

    what is a good web site to find a fill in the blank persuasive essay format! please reply ASAP this is due thursday......i only have 2 more days!!!!!!!!

    asked by varonica
  363. science

    whatis the deiffecnce between revoule and rotaian

    asked by sam
  364. Math

    A 720ml container holds a mixture of red, yellow, and white paint in a 5:3:12 ratio. How much more red paint than yellow paint is present in the mixture?

    asked by Britney
  365. English

    1.These reeds (come, comes) from cane plants. come

    asked by Hayden
  366. physics

    what happens to the force of frictionif the coefficient of friction was reduced by one thrid

    asked by jen
  367. college

    A computer manufacturer is about to unveil a new, faster personal computer. The new machine clearly is faster, but initial tests indicate there is more variation in the processing time. The processing time depends on the particular program being run, the

    asked by Anonymous
  368. Chemistry Intro

    If the solubility of alum is 1g @ 1 degree celcius and 1.7 g at 6 degree celcius how much alum (KAl(SO4)2.12H20) would you expect to dissolve at 5.5% C?

    asked by Kat
  369. science

    does the moon have light

    asked by sam
  370. Chemisty.....Help =))

    What is the molarity of ZnCl2 that forms when 30.0g of zinc completely reacts with CuCl2 according to the following reaction? Assume a final volume of 285 mL . (please explain step by step I have no clue!) Zn(s) + CuCl2(aq) --> ZnCl2(aq)+ Cu(s)

    asked by Lisa, Help needed!
  371. Math

    A family is moving and has a number of electronic devices in the same packing crate. One of the devices beeps every 8 minutes, another device beeps every 10 minutes, and a third device beeps every 12 minutes. If all the devices beeped together at 3:00pm,

    asked by Britney
  372. Physics

    A 30 N fishing pole is 2.00 m long and has its center of gravity .350 m from the heavy end. A fisherman holds the end of the pole in his left hand as he lifts a 100 N fish. If his right hand is .800 m from the heavy end, how much force does he have to

    asked by Jennifer
  373. Chemistry...Help!!

    To what volume should you dilute 131 mL of an 8.20 M CuCl2 solution so that 49.0 mL of the diluted solution contains 4.53g CuCl2 ?

    asked by Lisa, Help needed!
  374. poetry

    can you teach me poetry

    asked by sam
  375. science,

    how are sesons caused

    asked by sam
  376. Pre-Calc

    Seeking step by step help with this question...Thank you much. Let f(x) =|9x|. For the area above the x-axis and between the lines x= -9 and x=18

    asked by Amy
  377. math

    mike has two mats in the shape of triangles. the scale factor of the two mats is 7/9. what is the ratio of the perimeters?

    asked by laura
  378. 5th grade math

    The diameter of a penny is 3/4 in. How many pennies are needed to form a row 12in. long? Also to find the circumference of a circle do you use the radius or diameter x 3.14?

    asked by jill
  379. College Physics

    A vacuum cleaner has a measured sound level of 75.7 dB. What is the intensity of this sound? Answer in units of W/m^2

    asked by Tammi
  380. Chemistry

    Experiment on Titration of Acids and Bases Suppose some deionized water was left in the buret before it was filled with the oxalic acid solution you were using as a primary standard. When you perform the standardization of sodium hydroxide in Part 3, how

    asked by Jerome
  381. Physics

    A convex lens of focal length 10 cm forms image of object placed 30 cm in front of the lens. Find the magnification?

    asked by Shilpa
  382. Physics

    A spherical concave mirror has a radius R=360 mm forms an image of a h(object)=12 cm high object located d0=p=0.9 m from the vertex of the mirror. Find the position di=q(cm) and the height cm of the image.

    asked by Shilpa
  383. Math help

    It has been found that 60 percent of homes subscribe to a cable service including the program "Cooking with Math". However, of these subscribers, 18 percent never watch "Cooking with Math", while 15 percent claim to watch it more than 5 times per week.

    asked by Lily
  384. Finite Math

    What interest rate, compounded monthly, would you need to be paid in order to grow a $2000 investment into $3500 over a five year period?

    asked by Ericka
  385. History/ English

    I have to write a thesis statement and a prompt for my research paper and my topic is the Tet Offensive, how do i write a good one? I don't even know where to begin!

    asked by Courtnee
  386. chemistry

    Lead is a toxic metal that affects the central nervous system. A Pb-contaminated water sample contains 0.0011 % Pb by mass. How much of the water (in mL ) contains 165mg of Pb? (Assume a density of 1.0 g/ml.)

    asked by Lisa, Help needed!
  387. Finite Math

    What interest rate, compounded weekly, would you need to be paid in order to grow an $8000 investment into $12,000 over a ten year period?

    asked by Ericka