Questions Asked on
October 31, 2011

  1. Chemistry

    (a) Calculate the molarity of a solution that contains 0.175 mol ZnCl2 in exactly 150 mL of solution. (b) How many moles of HCl are present in 35.0 mL of a 4.50 M solution of nitric acid? (c) How many milliliters of 6.00 MNaOH solution are needed to

    asked by Anon
  2. calculus II SURFACE AREA Integration

    Find the exact area of the surface obtained by rotating the curve about the x-axis. y = sqrt(1 + 5x) from 1 ≤ x ≤ 7

    asked by Michael
  3. Calculus 1

    A fence is to be built to enclose a rectangular area of 220 square feet. The fence along three sides is to be made of material that costs 6 dollars per foot, and the material for the fourth side costs 13 dollars per foot. Find the dimensions of the

    asked by Olivia
  4. physics

    A 28.0 block is connected to an empty 2.20 bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.44 and the coefficient of kinetic friction between the table and the block is 0.35. Sand

    asked by xxx
  5. Chemistry

    a chemical engineer placed 1.520 g of a hydorcarbon in the bomb of a calorimeter. The bomb was immersed in 2.550 L of water and the sample was burned. The water temperature rose from 20.00C to 23.55C. If the calorimeter (excluding the water) had a heat

    asked by Tori
  6. Chemistry

    An aqueous solution of an unknown solute is tested with litmus paper and found to be acidic. The solution is weakly conducting compared with a solution of NaCl of the same concentration. Which of the following substances could the unknown be: KOH,NH3,HNO3,

    asked by Anon
  7. MATH

    a pile of bricks has 85 bricks in the bottom row, 79 bricks in the second row, 73 in the third row, and so on until there is only 1 brick in the top row. how many bricks are in the 12th row? how many rows are there in all?

    asked by Katie
  8. physics

    An artificial satellite circling the Earth completes each orbit in 139 minutes. (The radius of the Earth is 6.38 106 m. The mass of the Earth is 5.98 1024 kg.) (a) Find the altitude of the satellite.

    asked by Anonymous
  9. chemistry

    calculate the molarity of acetic acid in a vinegar sample,knowing that 5.00ml of vinegar requires 43.50ml of 0.105 M NaOH to just reach the phenolphthalein endpoint in a titration

    asked by denis
  10. Physics

    A simple Atwood’s machine uses a massless pulley and two masses m1 and m2. Starting from rest, the speed of the two masses is 4.1 m/s at the end of 7.6 s. At that time, the kinetic energy of the system is 86 J and each mass has moved a distance of 15.58

    asked by Maxx
  11. chemistry

    what is the molarity of a solution prepared by dissolving 2.24 grams of NaOH in enough deionized water to obtain 500.0ml of solution?The molar mass of NaOH is 40.0g

    asked by denis
  12. Physics

    A child sits down on one end of a horizontal seesaw of negligible weight, 2.14 m from the pivot point. No one balances on the other side. Find the instantaneous angular acceleration of the see-saw and the tangential linear acceleration of the child.

    asked by Kellie
  13. chemistry

    Use Equation 7.1 and assuming that core electrons contribute 1.00 and valence electrons contribute nothing to the screening constant, S, calculate Zeff} for these two ions. Express your answers as integers. Enter your answers numerically separated by a

    asked by Amanda
  14. physics

    to push a 25 kg crate up a 27 incline, a worker exerts a force of 120 N, parallel to the incline. As the crate slides 3.6 m, how much work is done on the crate by a) the worker b) force of gravity c) normal force

    asked by amy
  15. Chemistry

    A person suffering from hyponatremia has a sodium ion concentration in the blood of 0.118 Mand a total blood volume of 4.6 L.What mass of sodium chloride would need to be added to the blood to bring the sodium ion concentration up to 0.138 M, assuming no

    asked by Anon
  16. chemistry

    If 58g of NaOH are dissolved in water to make a final volume of exactly 400mL, what is the molar concentration of NaOH? (The FM of NaOH = 40.0) How do I set this up?

    asked by Katie
  17. Chemistry

    Consider the last electron in B: Values for n,l,and ml of 2,0,0 cannot be used. Why not? so is this the same answer as lithium. The ground stat cant have l=2 since it has no p electrons? Are values of 3,0, 0 allowed? Why or why not? I would say no for the

    asked by Hannah
  18. Chemistry

    Hydrogen sulfide is an impurity in natural gas that must be removed. One common removal method is called the Claus process, which relies on the reaction: 8 H2S(g) + 4 O2(g)--> S(l) + 8 H2O(g) Under optimal conditions the Claus process gives 98% yield of S8

    asked by Jen
  19. Chemistry

    Use Equation 7.1 and assuming that core electrons contribute 1.00 and valence electrons contribute nothing to the screening constant, S, calculate Zeff} for these two ions. Express your answers as integers. Enter your answers numerically separated by a

    asked by Kyle
  20. physics

    One end of a massless coil spring is suspended from a rigid ceiling. It is found that when a 4 kg mass is suspended from it the spring stretches 90 mm when the mass comes to rest. (a) What is the spring constant for the spring B)If the mass is then pulled

    asked by Andrea
  21. math

    a car travels at a constants speed and uses G(x) litres of gas per kilomotre, where x is the speed of the car in kilomotres oer hour and G(x)=(1280+x^2)/(320x) a>if fuel costs 1.29 per litre, determine the cost function C(x)that expresses the cost of the

    asked by invy
  22. Chemistry

    Is it quantitatively acceptable to titrate all KHC8H4O4 samples with the NaOH solution to the same dark red endpoint ?Explain. thank for helping~

    asked by limit
  23. PHYSICS HELP!!!!!

    A 7.0 g bullet is fired horizontally into a 1.5 kg block of wood suspended by a thread. The bullet emerges from the block with a speed of 195 m/s, and the block rises to a maximum height of 12 cm. Find the initial speed of the bullet.

    asked by Kayla L
  24. math

    From 1950 to 1970,some glaciers in Alaska thinned by an average of 1.7 ft per year.What was the change in glacier thickness during this period?

    asked by john
  25. Biology

    Does light wavelength affect cellular respiration rate? I know that it affects photosynthetic rate. I think it is not supposed to affect cellular respiration rate, but I recently conducted an experiment that has proved otherwise and I just want to make

    asked by Mariana
  26. physics

    Why does tee fly backwards after teeoff?

    asked by Peter Howe
  27. Chemistry

    The weight of dry acid are measured to the nearest milligram; however the volume of water in which it is dissolved is never a critical concern--water is even added to the Erlenmeyer flask while washing its wall during the titration . Explain why the

    asked by Lamis
  28. Chemistry

    Which of the following solutions is the most basic? (a) 0.6 M NH3, (b) 0.150 M KOH, (c) 0.100 M Ba(OH)2. Explain.

    asked by Jen
  29. organic chemistry--please help me!!!

    Give equations to show how sulfuric acid can convert 4-methylcyclohexene into a mixture of four isomeric c7H12 compounds(including starting material). Predict the relative amounts of each isomer.

    asked by Vivian
  30. Org.chem. I

    why is the toxicity of (+)-carvone in rats is about 400 times greater than that of(-)-carvone?

    asked by stephie
  31. English

    1) How do you usually quote the title of a chapter within a book? Thank you. Example: Jonathan Swift (author) Gulliver’s Travels (novel: italics + bold?) Beloved Horses, Hateful Men (title: italics?) 2) Full/complete reading of the abridged edition of

    asked by Henry2
  32. Chemistry

    What does it mean when we say that KHC8H4O4 is not hygroscopic ? thank for helping~

    asked by limit
  33. College Chemistry

    Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 50. cm3. If the combustion of this mixture releases 955 J of energy, to what volume will the gases expand against a constant pressure of 675 torr if all the

    asked by Amanda
  34. math

    Divide 25 in two parts such that its product is 126

    asked by Neetu
  35. Statistics

    The distribution of heights of adult males has a mean of 69 inches and a standard deviation of 4 inches. A random sample of 36 adult males is selected. Find the probability that the average height will be more than 70 inches. a.0.668 b.0.858 c.0.908

    asked by Monique
  36. Finance

    Farmer Tom Hedges anticipates taking 100,000 bushels of oats to the market in three months. The current cash price for oats is $2.15. He can sell a three- month futures contract for oats at $2.20. He decides to sell 10 5,000-bushel futures contracts at

    asked by Tee
  37. chemistry

    Determine the structure of the compound by using the IR and 1H NMR of a spectra that has the molecular formula: C4H8O2

    asked by jennel
  38. Algebra

    A student is taking a literature course in which four tests are given. To get a B, he must average at least 80 on the four tests. The student got scores of 82, 76, and 78 on the first three tests. Determine (in terms of inequality) what scores on the last

    asked by Liz
  39. Physics

    A vehicle is travelling at 25.0 m/s. It brakes provide an acceleration of -3.75 m/s^2[forward]. What is the driver's maximum reaction time if she is to avoid hitting an obstacle 95.0 m away? the answer is a number less than 0.5 second. can you tell me the

    asked by Dee
  40. Chemistry

    Calculate the frequency of a photon of orange light whose wavelength is 6.2*10^5m. (meters)

    asked by rob
  41. Stats

    Examining the location of accidents on a level, 4-mile bike path shows that they occur uniformly along the length of the path. What is the probability that an accident would occur over the first mile of this bike path? Give your answer as a number between

    asked by A
  42. Org Chem. I

    Using the Cahn-Ingold-Prelog sequence rules,assign priorities to the groups around the chiral carbon in carvone. Draw the structural formulas for (+)- & (-)-carvone with the molecules oriented in the correct position to show the R & S configurations.

    asked by stephie
  43. College Chemistry

    One mole of H2O(g) at 1.00 atm and 100.°C occupies a volume of 30.6 L. When one mole of H2O(g) is condensed to one mole of H2O(l) at 1.00 atm and 100.°C, 40.66 kJ of heat is released. If the density of H2O(l) at this temperature and pressure is 0.996

    asked by Amanda
  44. statistics

    The First National Bank of Wilson has 680 checking account customers. A recent sample of 60 of these customers showed 32 to have a Visa card with the bank. Construct the 98 percent confidence interval for the proportion of checking account customers who

    asked by Nathalia
  45. algebra

    $7,000 is invested into two accounts: 4,000 into an account paying 5% interest compounded monthly and $3,000 into an account paying 4.1% interest compounded continuously. compute the total interest earned at the end of 2 years.

    asked by Anil
  46. Physics

    While riding a Ferris wheel, the rider determines that the Ferris wheel makes 1.5 revolutions per minute. a) knowing that the diameter of the Ferris wheel is 100 ft, determine the angular speed (in rad/s) of the Ferris wheel. b) Determine the linear speed

    asked by Adam
  47. Physics

    A 95 kg rowboat is initially at rest, until it is pulled toward the dock with a rope with a tension of 30.0 N. The dock is higher than the boat, and the rope makes an angle of 25° at the place where it meets the boat. What is the acceleration of the boat?

    asked by Todd
  48. Physics

    What minimum speed does a 170 g. puck need to make it to the top of a 6.0 m. long, 27 frictionless ramp?

    asked by Sandrine Parent
  49. science

    Chemical formula : C12,H22,O11 How many carbon atoms are in 1 molecule of sugar? How many hydrogen atoms are in 1 molecule of sugar? How many oxygen molecules are in 1 molecule of sugar?

    asked by Ashlie
  50. organic chemistry

    Determine the structure of the compound by using the IR and 1H NMR of a spectra that has the molecular formula:C4H7ClO2

    asked by jennel
  51. Physics

    A bullet of mass 4.8 g strikes a ballistic pendulum of mass 3.3 kg. The center of mass of the pendulum rises a vertical distance of 9.7 cm. Assuming that the bullet remains embedded in the pendulum, calculate the bullet's initial speed. ....I'm getting an

    asked by Ellie
  52. algebra

    Researchers use formula f(t) = Pe^rt to model the population of fruit flies growing exponentially after t days. Measurements show that f(0) = 30 and f(5) = 1620 a) Find a function of the form f(t) = Pe^rt that models the fruit fly population after t days.

    asked by Anamaria
  53. calculus

    find the centroid of the plane region bounded by the curves y = cos x, y=sinx, x=0,

    asked by zoe
  54. College Chemistry

    As a system increases in volume, it absorbs 52.5 J of energy in the form of heat from the surroundings. The piston is working against a pressure of 0.500 atm. The final volume of the system is 58.0 L. What was the initial volume of the system if the

    asked by Amanda
  55. English

    The following is Karen Jo Shapiro's poem, "Me." ......... ........ ....... So many kinds of folks I see, but only I can be a ME. ================================== (Question) Would you explain 'So many kinds of folks I see'? 1. So many kinds of folks

    asked by rfvv
  56. Maths

    A mathematics class has 200 members. If there is 12% absentee rate per class meeting, find: a) mean, variance and standard deviation number of students who will be absent from each class. b) Draw the probability table and distribution graph of the number

    asked by Skin
  57. English

    What are some alliteration for tigers?

    asked by Taylor
  58. Statistics

    Please help!! I have no idea how to do this question. 14. A sample of 40 CD’s from your collection showed a mean length of 52.74 minutes with a standard deviation of 13.21 minutes a. Construct the 95 percent confidence interval for the mean. b. Construct

    asked by Kristi
  59. Physics

    Does the KE of a car change more when it accelerates from 27 km/h to 37 km/h or when it accelerates from 37 km/h to 47 km/h? 1. More information is needed. 2. No difference 3. From 37 km/h to 47 km/h 4. From 27 km/h to 37 km/h

    asked by Mathew
  60. Chemistry

    Potassium, K, is more reactive than sodium, Na. Calcium, Ca, is less reactive than sodium. The comparative reactivity of these metals is often noted as: K > Na > Ca. Explain the reactivity differences of K, Na, Ca.

    asked by Dani
  61. Chemistry

    Suppose that a PES experiment is performed in which mercury vapor is irradiated with ultraviolet light of wavelength 58.4 nm. What is the energy of a photon of this light, in eV?

    asked by K.
  62. Economics

    Consider the production function Q= 20K^(1/2)L^(1/2). The firm operates in the short run with 16 units of capital. a. The firm's short-run production function is Q=? b. The average product of labor function is AP=? c. The marginal product of labor function

    asked by Catherine
  63. Economics

    Total cost and total variable cost are parallel, yet average total cost and average variable cost are not parallel. a. Demonstrate mathematically that ATC and AVC are not parallel. b. Show mathematically that when both ATC and AVC are falling, ATC falls

    asked by Catherine
  64. Calculus

    Estimate delta f using linear approximation F(x) = x^ (1/3)e^(x-1), a=1, delta x = 0.4 linear approximation for delta f = Error is = Percentage error is = please explain tburoughly

    asked by Narimen
  65. physics

    A cylinder with a movable piston holds 2.75 mol of argon gas at a constant temperature of 295 K. As the gas is compressed isothermally, its pressure increases from 101 kPa to 121 kPa. Find (a) the final volume of the gas, (b) the work done by the gas, and

    asked by Matthias Schwartzkopf
  66. math

    A discount store takes 50% off of the retail price of a desk. For the store's holiday sale, it takes an additional 20% off of all furniture. The desk's retail price was $320. How much is the desk on sale for during the holiday sale?

    asked by iris
  67. physics

    A pitcher throws a baseball to a batter at 95 mph from a distance, d, away. The batter swings and hits the ball. (5280 ft = 1 mi, g = 32.174 ft/s/s). a) Assuming the pitch travels the full distance, d, how much reaction time does the batter have to hit the

    asked by Skyler
  68. Physics

    If two different masses have the same kinetic energy, their momenta are: a. proportional to the squares of their masses b. proportional to their masses c. proportional to the square roots of their masses d. inversely proportional to their masses e.

    asked by Anonymous
  69. Calculus - Math

    Sorry in advance - it's a very wordy, multi part question. The parts with the ..........are the parts that require an answer. I have no idea where to begin or what to do to solve this. We will determine the volume obtained when revolving the solid bound by

    asked by Sarah
  70. Calculus 1

    Use Newton's method to approximate the root of the equation x^3+x+2=0 with initial guess x1=-1 gives:

    asked by Olivia
  71. college algebra

    use the given zero to find the remaining zeros of each function.g(x)=x^3+3x^2+25x+75;zero:-5i

    asked by david
  72. business law

    At issue in the twenty-first century is the trade-off between the necessity of writers, musicians, artists, and movie studios to profit from their work and the free flow of ideas for the public benefit. Movie (and music) industry participants claim that

    asked by yanilexy rodriguez
  73. Science

    Different elements have different kinds of atoms. How can you tell an atom of one element from an atom of another? A. the number of electrons B. the number of neutrons C. the number of nuclei D. the number of protons

    asked by Sara Pleaseee help me
  74. Calculus 1 Newton's Method

    Using Newton's method, approximate the root of the equation x^3+x+2=0 with the initial guess x1=-1 gives: x2=? and x3=? answers are not 0 or -1

    asked by Olivia
  75. English

    He is wearing the kind of clothes I wear. ================== In the sentence above, what is the antecedent of the relative clause? 1. clothes 2. kind 3. the kind 4. the kind of clothes Which one among the four?

    asked by rfvv
  76. probability

    carlos shoots a free throw in basketball, what are the chances of making a basket?

    asked by joe
  77. Biology

    Can genetic mutations also occur within mitochondria and cause diseases? if yes, how common are these diseases?

    asked by Jen
  78. statistics

    Consider a 90% confidence interval for μ. Assume σ is not known. For which sample size n=10 or n=20, is the confidence interval longer?

    asked by Morgan
  79. English

    Could you please revise the following sentences, please? 1) As a matter of fact, two among our science teachers are willing to partake in the project where English would be the lingua franca. 2) Translate the following words into English, then choose two

    asked by Henry2
  80. chemistry

    6.67 mL of 18.0 molar sulfuric acid solution was dissolved in enough water to make 500 mL of solution. The molarity of the diluted solution is

    asked by Anonymous
  81. physics

    A horizontal rod with a length of 0.250 is mounted on a balance and carries a current. At the location of the rod a uniform horizontal magnetic field has a magnitude of 6.70×10−2 and direction perpendicular to the rod. The magnetic force on the rod is

    asked by Andrea
  82. Science

    A salinity meter placed in a tidal pool shows a dramatic decrease in salinity between 2 A.M. and 3 A.M.. This decrease is followed by a gradual rise in salinity from 11 A.M. until 4 P.M. the next day. What might explain these changes?

    asked by Lars
  83. English

    I really need your help to revise a paragraph on Asian cheetahs. I'll post a part each time. 1) The Asian cheetah, once common in India and valued by aristocrats for its ability to catch deer (antelopes), is on the point of dying out around the world. 2)

    asked by Henry2
  84. Math

    An Air Force study indicates that the probability of a disaster such as the January 28, 1986 explosion of the space shuttle Challenger was 1 in 35. The Challenger flight was the 25th mission. a. How many disasters would you expect in the first 25 flights?

    asked by Jill
  85. chemistry ASAP

    name the following: H2SeO3 H2TeO2 PO3^3- HCLO4 Please explain how to find the names !!!!!

    asked by chloe
  86. science

    What is the topography , climate and resources of mount vernon, new york 10550

    asked by derrick
  87. geometry

    if angle C of a parallelogram measures 65 degrees, what is the measure of angle D

    asked by onu
  88. Math

    I would like my investment to double in value every 3 years. At what rate of interest would I need to invest it, assuming the interest is compounded continuously?

    asked by Brianna
  89. statistics

    Calculate the first, second, and third quartiles: 20,26,28,25,31,14,23,15,12,26,29,24,31,19,31,17,15,17,20,31,32,16,21,22,28

    asked by LA
  90. chemistry

    what mass of water is required for the formation of 175 grams of carbon monoxide? please show work

    asked by Anonymous
  91. English

    Section Five describes process analysis in detail. What is the main point of process analysis in writing? Why are the four basic steps of process analysis important? What happens if you skip a step?

    asked by Samantha
  92. English

    What if I used the word "both" to refer to the two adjectives? Translate the following words into English; then choose two adjectives describing a person's character and define them both briefly.

    asked by Henry2
  93. physics

    A horizontal rod with a length of 0.250 is mounted on a balance and carries a current. At the location of the rod a uniform horizontal magnetic field has a magnitude of 6.70×10−2 and direction perpendicular to the rod. The magnetic force on the rod is

    asked by Andrea
  94. BioChem

    If you run an unknown sample and it is darker than your highest standard on your standard curve, what do you report as the concentration?

    asked by Dreamland11
  95. English

    1. There are two mes in me. 2. I am a unique me. 3. I am me. 4. I am a me. 5. I am a ME. 6. I am ME. 7. I am Me. (Are the expressions all grammatical? Can we use some in a poem? What is the difference?)

    asked by rfvv
  96. Statistics

    A mathematics class has 200 members. If there is 12% absentee rate per class meeting, find: a) mean, variance and standard deviation number of students who will be absent from each class. b) Draw the probability table and distribution graph of the number

    asked by Skin
  97. English

    Thank you very much for your corrections! Here are other statements on the same newspaper article. 1) The cheetah reintroduction programme is kicking off (starting?) with a meeting of experts in September. 2) The project includes the foundation of a

    asked by Henry2
  98. Chemistry

    calculate the frequency of an xray having a wavelength of 3.5*10to the negative seven m. (meters).

    asked by Nick
  99. Algebra

    Totally confused-learned this today and I don't get it-Please help Write the standard form of 9x^2 + 4y^2-72x+16y+124=0 I think the first step is to take the constant to right side so I have: 9x^2 + 4y^2-72x+16y=124 But then I'm lost!

    asked by Aubrey
  100. math analysis

    A rectangle with its base on the x axis is to be inscribed under the positive portions of the graph of y=8-x^2 . Write an equation for the area of the rectangle which uses only the variable x.

    asked by sarah
  101. math

    If a ¼ of a teaspoon is 1 ml, then how many milliliters are in 6 teaspoons

    asked by iris
  102. Algebra-Please check work

    I've reworked this and added on is any of it correct?Totally confused-learned this today and I don't get it-Please help Write the standard form of 9x^2 + 4y^2-72x+16y+124=0 I think the first step is to take the constant to right side so I have: 9x^2 +

    asked by Aubrey
  103. MATH CHALLEGE

    I am playing a dice game with my friend Kyle. Each of us roles a standard six-side die obtaining a number at random from 1 to 6. What is the probability that my number is greater than Kyle’s number?

    asked by PLEASE HELP
  104. Statistics

    This is my first stats class and I don't know how to do this, could you please help me? Thank you. You are asked to determine the typical number of sales of a certain product at the store you work for. A sample of 50 days over the last quarter shows an

    asked by Melvin
  105. critical thinking. Please help.

    Truth or False : for business writing,it is always best to present the most analytical, matter of fact writing in order to be convincing. most claims in business,and in persuasive writing generally tend to be contestable claims.this requires the author of

    asked by Anon
  106. Math

    Find the solution of the equation. 1. 2x=12 answer: x=6 2. 4x=20 answer: x=5 Did I answer these correctly?

    asked by Tonya
  107. Economics

    Total cost and total variable cost are parallel, yet average total cost and average variable cost are not parallel. a. Demonstrate mathematically that ATC and AVC are not parallel. b. Show mathematically that when both ATC and AVC are falling, ATC falls

    asked by Catherine
  108. physics

    a bullet leaves the barrel of a gun with the speed of 320m/s. the barrel is 80.0cm long. Assuming uniform acceleration, determine a)the time it took b)the acceleration of the bullet

    asked by Cindy
  109. History

    Please Help? What impact did Niccolo Machiavelli have on events during his days?

    asked by John
  110. math - natural logs

    Find the EXACT solution to e^(1-x) = 4^x You must use logs, not just a calculator.

    asked by BJ
  111. geography

    Which is closer to the South Pole, the southern tip of Africa or the most southern edge of mainland Australia? My answer is the most southern edge of mainland Australia.

    asked by Reed
  112. World Lit

    Compare and contrast Oedipus, from Sophocles’ Oedipus the King, and Creon from Sophocles’ Antigone as rulers. Some ways they are the same is that they both are rulers and they are wealthy people. Oedipus accuses Creon of conspiring against him. ** I

    asked by Brann
  113. BioChem

    If you want to determine the actual salicylate concentration for a sample that gives you a darker color than the highest standard, you would need to make a dilution of it. If you dilute it by mixing .25 mL of sample with .75 mL of water and then find that

    asked by Dreamland11
  114. math

    The number of cases for a disease has reduced by half every 10 years: 1970 - 21,168 1980 - 10,584 1990 - 5,292 Assume N is the number of reported cases t years after 1970. Which is a good model for N(t)? a) 21,168 (2)^t b) 21,168 (1/2)^t c) 21,168

    asked by Nora
  115. Math

    Is this a rational, irrational, or not a real number the square root of 49 and the square root of -81

    asked by Lisa
  116. Religion

    What kind of bookS can I find information on about US religion groups and the race involved with each other? Have to write a paper and its a hard topic. HELP!!!!!!

    asked by LaTarial
  117. Religion

    What kind of books can i find online that tells me about US religion groups and their race that involved each other? I have to write a paper on a very hard topic. HELP!!!!!!!!!!!!!

    asked by LaTarial
  118. english

    is fighty a word?

    asked by Anonymous
  119. geometry

    if m

    asked by jovon
  120. statistics

    The average age of a child in kindergarden is 5 years or 60 months. The standard deviation is 12 months. If a random child is selected, find the probability that the childs age is between 54 and 66 months.

    asked by Anonymous
  121. science

    Im 13 in the 8th grade and i need help on figurinmg out simularites between mitosis and meosis please help thanks :]

    asked by lala
  122. maths

    show that the lines x^-4xy+y^=0 and x+y=1 form an equilateral triangle and find its area

    asked by prateek
  123. Chemistry

    A mettallurgist decided to make a special alloy. He melted 30 grams of Au(Gold) with 30 grams of Pb. This melting process resulted to 42 grams of an Au-Pb alloy and some leftover Pb. This scientist wanted to make 420 grams of this alloy with no leftovers

    asked by Eli
  124. accounting

    1. Describe the roles and responsibilities of management and independent auditors in the financial reporting process 2. Define the following three users of financial accounting disclosures and the relationships among them: a) Financial analysts b) Private

    asked by Ariana
  125. phy

    A frog applies a constant force of 80N while pushing him up a hill, while gravity and legs friction cause a constant 80N force in the opposite direction. In this situation a. the frog applied force of 80N means the frog must be accelerating b. the net

    asked by Tanzim
  126. Statistics

    A recent article in the Myrtle Beach Sun Times reported that the mean labor cost to repair a color television is $90 with a standard deviation of $22. Monte’s TV Sales and Service completed repairs on two sets this morning. The labor cost for the first

    asked by Jill
  127. science

    how are climate and weather related to currents? give two examples

    asked by basha
  128. Bios

    What exactly should I write in a senior yearbook bio?

    asked by Amy
  129. Spanish Fun

    Isn't "Halloween" still "Halloween" in Spanish

    asked by Alice
  130. Chemistry

    In the cchemistry lab we conducted an experiment called atomic spectroscopy. We had to find the color, energy, wavelength, and 1/lamda for Hydrogen, neon, and mercury. For hydrogen: red 1.90ev 650nm 1.54e^-3 red 2.02ev 610nm 1.64e^-3 green 2.30ev 545nm

    asked by Hannah
  131. SCIENCE

    i am doing a project on pneumonia. i need to answer the following questions in a proper sentence. 1. does pneumonia affect both men and women? 2. what are the chances for survival. 3. what is the % of population affected? 4. is the disease on the increase

    asked by Baily
  132. English

    The accident occurred on a/an ______ road A. intact B. enlisted C. isolated D. forging I know what all the words mean I just don't know which one is best. I thing it is wither isolated or intact. Help would be immensely appreciated.

    asked by Matt
  133. Phi103

    explain what logic can and cannot do. In other words, what kinds of questions and logic are not decided by logical analysis

    asked by Mary Smith
  134. physics

    Find the pressure exerted by a solid,when placed on a wooden platform.The area of contact is 200 cm and the solid weight 150 N?

    asked by ASWATHY
  135. Science

    What geological forces might have created land, sea, and sky by Phil Brodatz?

    asked by DestinyLashea
  136. physics

    A solid body weighting 100N and having a base area of 2m is placed on the ground.Find the pressure exerted by the solid body on the ground.

    asked by ASWATHY
  137. psy 202

    8. What is the general term Freud used to describe the process whereby the mind protects itself against distress? (Points : 1) Compensation Defense mechanism Rationalization Displacement

    asked by marla
  138. Statistics

    This problem does not make any sense to me!!! I would greatly appreciate your assistance, thanks. A recent survey showed 4.6 percent of the sample of 250 had suffered some kind of identity theft in the past 12 months. a. Construct a 90 percent confidence

    asked by Tasha
  139. Health Administration

    How to write effective Case Study

    asked by Liz
  140. Botany

    During the last part of cellular respiration in the mitochondrion, electron flow is tapped and used to make ATP. Where do the electrons end up when they are finished flowing?

    asked by Josh
  141. calculus 1

    how do i find all vertical and horizontal asymptotes for the function y= 3x^2-8x+25/x^2+7x-18

    asked by Morgan
  142. Math

    How to factor 4y^2+4yz+z^2-1?

    asked by Hey
  143. math

    what is 13 6/7 coverted to a decimal rounded to the nearest hundredth?

    asked by Patty Cook
  144. Math

    How to write l,582,658,124 in word form

    asked by Gail
  145. History

    Please help How does Niccolo Machiavelli fit the Renaissance mold?

    asked by John
  146. Science

    How can too many water plants cause the dissolved oxygen level in the water to be too low?

    asked by Jill
  147. critical thinking.

    which of the following is the best example of "negative evidence" for the claim," samsung makes excellent quality phones"? A. 50.6 of htc evo users prefer evo to samsung's android. B. the main competitors of samsung are htc,nokia and black barry. C. 4 out

    asked by Anon
  148. math - logs

    2 ln (x) = ln (20-x)

    asked by Sebastian
  149. Marketing

    The process of naming broad product-markets and then dividing them in order to select target markets and develop suitable

    asked by Anonymous
  150. Science

    Different elements have different kinds of atoms. How can you tell an atom of one element from an atom of another? A. the number of electrons B. the number of neutrons C. the number of nuclei D. the number of protons

    asked by Sara Pleaseee
  151. statistics

    A researcher is investigating whether, on average, 3rd grade males have significantly different creativity scores than 3rd grade females. She samples students from a large school district where she works. What is the independent variable?

    asked by Anonymous
  152. science

    Which of the following characteristic differentiate Eubacteria from Archaebacteria? 1. Circular nature of chromosome. 2. Absence of nuclear membrane. 3. Presence of 70S ribosomes. 4. Presence of murein in cell wall.

    asked by Kripa
  153. statistics

    Math Answer: How much is 35 plus 78 minus 29 equals?

    asked by Anonymous
  154. sentences

    what is a sentence I can use using the word unyielding

    asked by jennifer white
  155. Chemistry

    calculate the energy associated with a photon whose wavelength is 14.5*10^-8cm.

    asked by Albert
  156. Chemistry

    Calculate the wavelength of a photon of yellow light whose frequency is 6.3*10^5m. (meters)

    asked by Mike
  157. Science

    Study the data table below. A three-column table presenting the 'Melting Point and Boiling Point for Common Substances.' The column headers are 'Substance,' 'Melting point (°C),' and 'Boiling point (°C).' For substance aluminum, the values are '660' and

    asked by Heather Pleasee Helppp
  158. algebra

    2d+3=13

    asked by gee
  159. to ms.sue

    i know it's late and well I don't know what sentence I could use using the word twined.And how come you aren't trick-or treating.I'm not because I have alot of homework.My sister and my momwent just 13 minutes ago.

    asked by jennifer white
  160. physics

    if the forces that act on a bullet and on the recoiling gun from which it is fired are equal in magnitude, why do the bullet and gun have very different accerlerations

    asked by Anonymous
  161. Chemistry

    How much energy is associated with a photon in the gamma ray region of the spectrum with a frequency of 6.6*10^5s^-1

    asked by Rob
  162. math

    solve the equation. check the solution 5 x g -5 = 100

    asked by ann
  163. English

    I included the last sentences on cheetahs and a few more on the use of gerund/infinitive. Thank you. 1) This project aims at establishing a second, independent population of Asiatic lions and will hopefully enable the subspecies to survive, too. 2) This

    asked by Henry2
  164. Factoring Trinomials

    Working on how to factor trinomials, and the method that works best for me is the criss cross method, so Ive sticked with it. But Ive been stuck on one question for the past few minutes, and don't know what I've been doing wrong. 4x^2+23x+15 2x and 2x

    asked by -Untamed-
  165. American Government

    what distinguishes the irs and osha from other regulatory agencies?

    asked by Maci
  166. Org. Chem.

    If you were relying on IR data alone,could you determine if you had the (+) or (-) form of carvone? why or why not? suggest one other method for detection.

    asked by stephie
  167. SCIENCE

    thanks for helping me on the other questions but i have 1 more... what is the % of population affected with pneumonia. If you could answer this question than it will be very helpful. thank you :)

    asked by Baily
  168. calculus

    Find the derivative of the function. HINT [See Quick Examples on page 835.] f(x) = 9x ln x

    asked by joyce
  169. stats

    if IQ is normally distributed with a mean of 100 and a standard deviation of 10, what stand score (z-score) would represent a person with an IQ of 75?

    asked by stacey
  170. Chemistry

    What solid forms when sulfuric acid is added to a reaction mixture of p-aminobenzoic acid and absolute ethanol?

    asked by Anonymous
  171. Calculus

    Calculate the indefinite integral of ((x^3)+1)/(x^5)

    asked by Shayna
  172. Early childhood edcation

    1)when a child demonstrates an anability to leap over a barrier his teacher checks to see if he has mastered the skills of jumping down from a height and jumping for distance. In doing this the teacher is a)applying a developmental perspective b)measuring

    asked by Easter
  173. math

    what is 5/9 divided by 5

    asked by Patty Cook
  174. Agriculture Econ

    What is the relationship between the price elasticity & the total revenue received by produces of a commodity

    asked by troy
  175. english

    how to rewrite this sentence Hibertnation helps an animal with an animal's survival

    asked by cameron
  176. Language Arts

    What is a phrase for admirably?

    asked by What's Up???
  177. Chemistry

    What happens in confirmatory test for bismuth? What happens in confirmatory test for copper? What happens in confirmatory test for arsenic? Please help! an you explain in detail. even a link explaining it would help

    asked by travis
  178. Chemistry

    How would you test a solution containing only Co2+ and Fe3+ ions?

    asked by Marie
  179. Calc

    Solve: du/dt = (sin t) / (u^2 + 1) So far I got: arctan u = -ln |csc t + cot t| + C I'm not sure where to go from there. Thank you so much for the help!

    asked by Erica
  180. MATH

    given the arithmetic sequence 71,65,59 ... if a(n) is -43 what is the value of n

    asked by Katie
  181. algebra

    Can u traslate the following into words 3+w 8x 40-p

    asked by L
  182. trig

    Hi, I need to find the domain and rnge of the following: 1. X= 1/2 (cos theta + theta sin theta) Y=1/2 (sin theta - theta cos theta) total guess here, but here goes Domain cos theta = +/- 1 and domain sin theta = +/- 1 so domain theta sin theta = 0-

    asked by Courtney
  183. Genetics

    What is an approximate value of the length of a 30 nm fiber that contains 120,000 nucleotide pairs of DNA?

    asked by Kyle
  184. Physics

    A comet is traveling towards the earth. The comet has a mass of 5.50E+12 kg and a radius of 323 m. The comet is traveling with a speed of 13.5 km/s and spinning with a period of 0.15 seconds when its center is a distance 2.28E+7 m away from the center of

    asked by Jerry
  185. English

    I forgot to include the following sentence. 1) Write a ten-line paragraph about you. describing your physical apperance and character. Then refer to the things you like and to a typical school day.

    asked by Henry2
  186. math

    each student will create an adding, subtracting, multiplying, or dividing expression containing square roots.you will simplify the expression and display it step by step. There can be no use of perfect squares in the original expression.

    asked by Mike
  187. physcis

    equation of nuclear fission of urnaium 235 forming iodine 131

    asked by Anonymous
  188. math

    If y(x-1)=z then X =

    asked by iris
  189. science

    explain why must the ramp be angled initially to get a starting height

    asked by venessa
  190. World Lit 1

    What do the Norsemen call the Arab’s white horse? a. High Jumper b. Dog c. Pale Moon d. Rabbit I think it is Pale Moon. But I am not 100% sure. Please someone help me

    asked by Brann
  191. Math

    5 4 ______ - ______ 2(e-f) 3(f-e) Please include workings thx

    asked by ASDFGHJKL;
  192. chem

    why doesanhydrous hydrogen bromide add to 1-pentene to afford a racemic mixture of. 2-bromopentane, and not 1-bromopentane.

    asked by lou
  193. Math

    4C/(10C-5D) + 2D/(6C-3D) Please include workings thx

    asked by ASDFGHJKL;
  194. Math - 2 Questions

    1. (1/4)C/C+(1/3) 2. (1/X)+(1/Y)/(2/X) Please include workings and thank you in advance

    asked by ASDFGHJKL;
  195. science chemistry

    enumerate the 100 alkanes and its molecular formula

    asked by janeth
  196. science

    what do all animals have in common?

    asked by nia
  197. science

    what do all animals have in common?

    asked by nia
  198. English

    what are some alliterations for wild that describes a tiger?

    asked by Selena
  199. algebra

    PLEASE HELP ME FIND x/-3 = 3/-2 Thanks!

    asked by TINA
  200. calculus

    simplify (ln(8x^2))/(ln(4x)) Thanks!

    asked by Anonymous
  201. statistics

    Suppose a random sample of 25 students is selected from a community college where the scores in the final exam (out of 125 points) are normally distributed, with mean equal to 112 and standard deviation equal to 12. Find the probability that the sample

    asked by Monique
  202. english

    is cool cats an alliteration?

    asked by Anonymous
  203. n/a

    Is it not possible to talk to tutors or students directly?

    asked by Dan
  204. Chemistry

    What energy is associated with a photon in the infared region of the spectrum having a frequency of 4.5*10^12s^-1

    asked by Fred
  205. argumentative essay

    more biological influence and risk factors related to alcohol

    asked by danilo duldulao
  206. math

    h(x)=2x-5 h(0)= h(-8)=

    asked by gee
  207. physics

    if the forces that act on a bullet and on the recoiling gun from which it is fired are equal in magnitude, why do the bullet and gun have very different accerlerations

    asked by Anonymous
  208. statistics

    Suppose that you have just taken a test and earned a score of 90%. Your instructor informs the class that the grades were normally distributed, that the average was 75%, and the standard deviation was 12%. Calculate your z-score to the hundredths place.

    asked by Letisha
  209. english

    Any suggestions for corrections? It’s The Little Things In my line of work, my passion for helping others can often times be a thankless job. Once in a while, in the midst of pain, suffering, and chaos, I experience feelings that are in contrast to what

    asked by Shell
  210. MRU

    suppose a population of nursing students heights is normally distributed with a population mean of 166 cm and a population stanadr deviation of 7.5cm if a female is randomly selected from this population, what is the probability that she will have a height

    asked by Mike
  211. Social Studies-Amrican History

    What were some of the first calls of independence ffrom the colonists??? I've got a few: Join or Die Unite or Die Don't tread on me Give me librty or give me Death ......

    asked by Alice
  212. el camino real

    if income in the US was normally distributed, what z-score would represent the bottom 10%, the poorest 10%

    asked by stacey
  213. stats

    if income in the us was normally distributed, what z-score would represent the top 1%?

    asked by stacey
  214. Math

    8m ≥ 2(2m +3) is the answer 8m ≥2(2m + 3)

    asked by Adam
  215. American Government

    what are some problems with regulatory agencies?

    asked by Maci