Questions Asked on
March 4, 2013

  1. Chemistry

    A buffer consists of 0.16 M KHCO3 and 0.39 M K2CO3. Carbonic acid is a diprotic acid with Ka1 = 4.5 10-7 and Ka2 = 4.7 10-11. (a) Which Ka value is more important to this buffer? Ka1 Ka2 I don't understand this one at all. How do I determine which Ka value

    asked by Edward
  2. Chemistry

    A beaker of nitric acid is neutralized with calcium hydroxide. Write a balanced molecular equation and a net ionic equation for his reaction

    asked by Amee
  3. Algebra

    Suppose a population of 160 crickets doubles in size every month. The function gives the population after x months. How many crickets will there be after 2 years? (1 point)2,684,354,560 crickets 640 crickets 7,680 crickets 655,360 crickets

    asked by Anonymous
  4. Analytical Chemistry

    How many milliliters of 0.0560 M EDTA are required to react with 50.0 mL of 0.0170 M Cu^2+? With 50 mL of 0.0170 M Sc^3+? My work so far: (50mL)(0.0170mmol/mL)= 0.85 mmol Cu^2+ I'm not sure how to do the rest. Please help.

    asked by Sam
  5. physics

    An ocean wave travels 17.1 m in 6.7 s. The distance between the two nearest wave crests is 5.1 m. What is the frequency of the wave? Answer in units of H

    asked by hannah
  6. Physics

    If you walk 2 km from your house to a store then back home, whats your displacement? (Displacement is the difference between 1st position and final position)

    asked by Heleny
  7. algebra

    Andrew has a four-year college loan for $20,000. The lender charges a simple interest rate of 5 percent. How much interest will he have to pay? simple interest = P × r × t

    asked by Anonymous
  8. chem. please help!! asap! thanks xx

    what mass of water must be added to 425 g of formaldehyde to prepare a 40.0% (by mass) solution of formaldehyde? this solution, called formalin, is used to preserve biological specimens. (hint:) substitute the known quantities into the definition for mass

    asked by danielle p.
  9. Chemistry

    in an experiment, ammonia gas, NH3(g) was bubbled through distilled water. Some of the dissolved ammonia gas, NH3, reacted with the water to form the aqueous ammonia ions, NH4. When red litmus paper was placed in contact with the aqueous solution, the

    asked by Joe
  10. Physics

    Two curves on a highway have the same radii. However, one is unbanked and the other is banked at an angle θ. A car can safely travel along the unbanked curve at a maximum speed v0 under conditions when the coefficient of static friction between the tires

    asked by Dee
  11. Chemistry

    An industrial chemist studying bleaching and sterilizing prepares several hypochlorite buffers. Find the pH of the following buffers. (a) 0.090 M HClO and 0.090 M NaClO (b) 0.090 M HClO and 0.135 M NaClO (c) 0.135 M HClO and 0.090 M NaClO (d) One liter of

    asked by Edward
  12. chemistry !

    a 135-g sample of sea water is evaporated to dryness, leaving 4.73 g of solid residue (the salts formerly dissolved in the seawater). calculate the mass percent of solute present in the original sea water. please help I need to pass this test. thank you

    asked by Eleanor
  13. Chemistry

    1. Hess's law _____. A.) makes it possible to calculate H for complicated chemical reactions B.) states that when you reverse a chemical equation, the sign of H does not change C.) determines the way a calorimeter works D.) describes the vaporization of

    asked by Jack
  14. Algebra

    Which of the following types of information is suited for display on a scatter plot? A.relationship between favorite color and age B.relationship between number of pets and favorite TV show C.relationship between hours of exercise and number of siblings

    asked by Cassie
  15. Chemistry

    The solubility of a gas at 7.0 atm of pressure is 0.52 g/L . How many grams of the gas would be disolved per 1.0 L if the pressure increased 40.0 percent?

    asked by Joy
  16. physics

    what is the minimum riding speed needed to be able to hear the whistle? Remember, you can assume the following things: The whistle you use to call your hunting dog has a frequency of 21.0 kHz, but your dog is ignoring it. You suspect the whistle may not be

    asked by taylor
  17. Algebra

    You want to make a graph to show how you spend your time each day. What is an advantage of choosing a circle graph for this data? A.A circle graph shows how each category of time relates to the total amount of time. B.A circle graph is easier to make. C.It

    asked by Cassie
  18. Pre-Algebra

    Write the given sentence as an equation. Tim's age in 7 years will be three times what it was 19 years ago.

    asked by Amy
  19. chemistry

    Phenylacetic acid (C6H5CH2COOH) is one of the substances that accumulates in the blood of people with phenylketonuria, an inherited disorder that can cause mental retardation or even death. A 0.021 M solution of C6H5CH2COOH has a pH of 2.99. Calculate the

    asked by hannah
  20. Algebra

    represent the relationship between the number of triangles and the perimeter of the figures they form. fill in table below. triangle 1: 6-6-5(b) triangle 2:6-6-5(b)&(H) triangle 3: 6-6-5 (b)-5 (B) 5 (h) fill in number of triangles-1, 2, 3, and perimeter

    asked by Brieson
  21. poetry

    What is the authors tone in the poem arithmetic?

    asked by miranda
  22. Chemistry

    Hess's law _____. A.) makes it possible to calculate H for complicated chemical reactions B.) states that when you reverse a chemical equation, the sign of H does not change C.) determines the way a calorimeter works D.) describes the vaporization of

    asked by Jack
  23. Calculus

    The owner of a used tire store wants to construct a fence to enclose a rectangular outdoor storage area adjacent to the store, using part of the side of the store (which is 220 feet long) for part of one of the sides. (See the figure below.) There are 430

    asked by Travis
  24. math

    The radius of a cylinder is 3x-2 cm. The height of the cylinder is x+3 cm. What is the surface area of the cylinder? The choices are: 2pi(3x^2 + 10x - 8) 2pi(12x^2 + 7x - 2) 2pi(12x^2 - 2x + 13) 2pi(12x^2 - 5x - 2) Please help me in setting this up and

    asked by Jane
  25. Algebra

    What type of graph does not show the number of times a response was given? A.box-and-whisker plot B.line plot C.stem-and-leaf plot D.bar graph I think it is a bar graph/D

    asked by Cassie
  26. Calculus

    The position of a particle moving on a horizontal line is given by s(t)=2t^3-15t^2+24t-5, where s is measured in feet and t in seconds. a: What is the initial position of the particle? b: What is the average velocity of the particle on the interval

    asked by Raul
  27. Biology

    1-how do the parts of the respiratory system worj togather? 2-how does the respiratory system work with other body systems? 3- which body system helps Respiratory system bring oxygen to body? A- circulatory B- excretory C- digestive D- muscular

    asked by Heleny
  28. math

    A community center is expanding the size of its rectangular meeting hall. The hall is currently 300ft long and 150ft wide. The center plans to expand both the length and the width of the meeting hall by 3x ft. What polynomial in standard form represents

    asked by Jane
  29. math

    Ivan has completed 45% of his walk. He has already walked 9 km. How much farther does he have left to walk? I don't understand how to do this. Could you please help and show me how you got this answer? Thank you.

    asked by Cherie
  30. chemistry

    A sample of oxygen that occupies 1.00x10^6 mL at 575 mm Hg is subjected to a pressure of 1.36 atm. What will the final volume of the sample be if the temperature is held constant? How would I set up this equation?

    asked by kate
  31. Chemistry

    Consider the titration of 25.00 mL of 0.08364 M pyridine (see structure below) with 0.1067 M HCl. Find the pH at the following acid volumes (Va): 4.63 mL, Ve, and 25.0 mL. pKa = 11.3 I got 11.81, 6.63, and 1.74 respectively. Yet, the last two are incorrect

    asked by Angelyka
  32. Pre-Algebra

    What association would you expect if graphing height and weight? (1 point) positive nonlinear negative none of these

    asked by TheFriendlyUnicorn
  33. World History

    What is the significance of Dred Scott v. Sandford? My answer: Dred Scott v. Sandford is significant because it effectively ended the Missouri Compromise, hardening the political rivalry between the North and the South?

    asked by Victoria
  34. chemistry

    Some spacecrafts use hydrazine (N2H4) as fuel and is burned according to the following reaction: N2H4(l)+N2O4(g)=>2 N2O(g)+2 H2O(g) Calculate the DHrxn° for this reaction using the standard enthalpies of formation from Appendix IIB. Calculate your answer

    asked by Brandi
  35. Calculus

    At 2:00 PM a car's speedometer reads 30 mi/h. At 2:10 PM it reads 50 mi/h. Show that at some time between 2:00 and 2:10 the acceleration is exactly 120 mi/h^2.

    asked by bryan
  36. Physics

    A horizontal spring is lying on a frictionless surface. One end of the spring is attaches to a wall while the other end is connected to a movable object. The spring and object are compressed by 0.076 m, released from rest, and subsequently oscillate back

    asked by Erick
  37. chemistry quick homework help

    What is the molecular geometry surrounding the carbon atom in CI4? (This compound contains the elements caron and iodine, not chlorine.) trigonal planer pyramidal (trigonal pyramidal) bent (angular) linear tetrahedral

    asked by will.i.am
  38. English

    help please has to be turned in today don't really understand it. Chief Joseph Surrenders Compare Chief Joseph's speech with the "Gettysburg Address". Discuss the similarities and differences between them. (Consider the feelings of the speaker, as well as

    asked by Anonymous
  39. Physics

    A ladder (L = 7.80 m) of weight WL = 360 N leans against a smooth vertical wall. The term "smooth" means that the wall can exert only a normal force directed perpendicular to the wall and cannot exert a frictional force parallel to it. A firefighter, whose

    asked by Dee
  40. Chemistry

    What is the significance of the distance between two metals in the activity series?

    asked by Katherine
  41. physics

    A 15 ohm resistor is made from a copper wire of mass 14.2 grams. What is the wire's diameter and length?

    asked by lindsey
  42. maths -circle

    A chord of length 10 cm divides a circle of radius 5root2 cm in two segments. find the area of minor segment.

    asked by anchal
  43. math

    4 people share 3 oranges equally.How many does each person get?

    asked by Anonymous
  44. Pre-Algebra

    You drop a rock off a bridge. The rock's height, h(in feet above the water), after t seconds is modeled by h=-16t2+541. What is the height of the rock after 2 seconds?

    asked by Amy
  45. Stats

    Lemington’s is trying to determine how many Jean Hudson dresses to order for the spring season. Demand for the dresses is assumed to follow a normal distribution with mean 400 and standard deviation 100. The contract between Jean Hudson and Lemington’s

    asked by Kod
  46. science

    A heat exchanger is used to warm apple cider using steam as the heat source. The cider is heated from an initial temperature of 4 degrees celcius to a final temperature of 65 degree celcius. The steam enters the heat exchanger as 50% quality steam and

    asked by Bev
  47. physics

    In the figure, a frictionless roller coaster car of mass m = 672 kg tops the first hill with speed v0 = 19.4 m/s at height h = 34.7 m. How much work does the gravitational force do on the car from that point to (a) point A, (b) point B, and (c) point C? If

    asked by Anonymous
  48. Chemistry

    A 1.44-g sample of an unknown pure gas occupies a volume of 0.336 L at a pressure of 1.00 atm and a temperature of 100.0 degrees Celsius. What is the unknown gas?

    asked by Lily
  49. science

    If you are titrating 25.00 mL of a 1.00mg/ml CaCO3 solution, how many mL of 0.010M EDTA solution will be required to reach the equivalence point

    asked by Chris
  50. Pre Calculus

    A contractor is to fence off a rectangular field along a straight river, the side along the river requiring no fence. What is the least amount of fencing needed to fence of 30,000 meters squared?

    asked by Lauren
  51. Food Chemestry

    A heat exchanger is used to warm apple cider using steam as the heat source. The cider is heated from an initial temperature of 4 degrees celcius to a final temperature of 65 degree celcius. The steam enters the heat exchanger as 50% quality steam and

    asked by Bev
  52. Statistic

    IQs among undergraduates at Mountain Tech are approximately normally distributed. The mean undergraduate IQ is 110. About 95% of undergraduates have IQs between 100 and 120. The standard deviation of these IQs is about A. 5 B. 10 C. 15 D. 20 E. 25

    asked by Mm
  53. math

    Translate this sentence into an equation. 58 is the sum of 8 and gails score. Use the variable g to represent gail score.

    asked by latasha
  54. Physics

    Relative to some reference points , ur nose is in motion when you run. Relative to othrrs, its not in motion. Give one example of each,

    asked by Heleny
  55. Soc. Studies

    What was the outcome of the Alliance for Progress? A.Americans opposed Kennedy’s policies. B.Relations between the United States and Latin America improved. C.Relations between the United States and Latin America did not improve. D.Tensions increased

    asked by Cassie
  56. physis

    A house painter stands 3 m above the ground on a 4.9-m-long ladder that leans against the wall at a point 4.7 m above the ground. The painter weighs 697 N and the ladder weighs 180 N. Assuming no friction between the house and the upper end of the ladder,

    asked by hankash
  57. Life orientation

    Identify 3 courses or study field / career paths in order of preference and provide 2 reason for each

    asked by Tebogo
  58. C H E M I S T R Y !

    A sample of rain in an area with severe air pollution has a pH OF 3.5. What is the pOH of this rainwater?

    asked by Lauren J.
  59. Physics please help!!

    A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is 2.23 hours. What is density of the planet? Assume that the planet has a uniform density.

    asked by Jose
  60. math

    Which statement is not true? A. Every parallelogram is a rectangle. B. Every square is a rhombus. C. Every square is a parallelogram. D. Every rhombus is a parallelogram.

    asked by jizebella
  61. accounting

    A customer requests a loan advance of $300 with an annual interest rate of 22%. What is the dollar amount of the interest for the entire year?

    asked by Anonymous
  62. physic

    a 2500 car enters curve with a radius of 45 m .if the car is moving at speed of 35 m/s.what is the centripetal force that maintains the car s circular motion the curve ?

    asked by said
  63. Social Studies

    How did the immigrants who came to the United States between 1820 and 1860 change the character of the country?

    asked by Bob
  64. Chemistry

    A 1.44-g sample of an unknown pure gas occupies a volume of 0.336 L at a pressure of 1.00 atm and a temperature of 100.0 degrees Celsius. What is the unknown gas?

    asked by Lily
  65. math

    how munch sand in cubic feet for a sandbox 6 inches high 3 feet wide 3 feet long

    asked by haley
  66. corporate finance

    1. Which of the following is NOT correct for a firm with seasonal sales and customers who all pay promptly at the end of 30 days? a. DSO will vary from month to month. b. The quarterly uncollected balances schedule will be the same in each quarter. c. The

    asked by jone
  67. Chemistry

    Calculate the mass percent composition of carbon in each the following carbon compounds. C2H2 C3H6 C2H6 C2H6O

    asked by Amee
  68. Stat

    1. For the following scores, X Y 1 6 4 1 1 4 1 3 3 1 Sketch a scatter plot and estimate the value of the Pearson correlation. b. Compute the Pearson correlation 2. For the following set of scores, X Y 6 4 3 1 5 0 6 7 4 2 6 4 a. Compute the Pearson

    asked by Cole Brown
  69. plzzzzzzz help me out.

    a beam of light consisting of two wavelengths 800nm and 600 nm is used to obtain the interference pattern in youngs double slit expt on a screen placed 1.4m away.if two slits are separated by 0.28mm,calculate the least distance from the central bright

    asked by Abhishek
  70. math

    John drives to work each morning and the trip takes an average of µ = 38 minutes. The distribution of driving times is approximately normal with a standard deviation of σ = 5 minutes. For a randomly selected morning, what is the probability that John’s

    asked by Anonymous
  71. chemistry

    the equilibrium constant of the decomposition of NOCL is 1.6*10^-5. calculatethe concentration of all species at equilibrium if initially 3.52 mol of NOCL is placed in a 5.00 L container

    asked by nancy
  72. chemistry

    Calculate the molar concentration of OH− ions in an 1.79 M solution of hypobromite ion (BrO−; Kb = 4.0 10-6).

    asked by sara
  73. statistics

    Is "42% of the people in New York City have 0+ blood" desriptive or inferential?

    asked by Rhonda
  74. Finite, Math, Probability

    Assume that there are 18 board members: 12 females, and 6 males including Larry. There are 3 tasks to be assigned. Note that assigning the same people different tasks constitutes a different assignment. Find the probability that both males and females are

    asked by Cayla
  75. English

    Read the following sentence: Moses was a hebrew prophet and led his people out of captivity. What is the simple subject of this sentence? A: Hebrew prophet B: people C: Captivity D: Moses Answer A ?

    asked by Ciara
  76. maths

    A Plank of Wood 6 m Long is cut in the ratio 1:5. find the length of the Longer Piece in centimetres.

    asked by Anonymous
  77. Physics: Aluminum Block

    A 1.65-kg aluminum block and a 6.85-kg copper block are connected by a light string over a frictionless pulley. The two blocks are allowed to move on a fixed steel block wedge (of angle è = 31.0°) as shown in the figure. Making use of the table below,

    asked by crystal
  78. algebra

    A ball is thrown upward with an initial velocity of 14 meters per second from a cliff that is high. The height of the ball is given by the quadratic equation H = 49t^2 + 14t +60 where h is in meters and t is the time in seconds since the ball was thrown.

    asked by Sherrydoug2
  79. Physics

    A basketball is thrown from the ground into the air at an angle of 30 degrees to the horizontal. If this object reaches a maximum height of 5.75m, at what velocity was it thrown? How am i suppose to do this question if no velocity is given? I need help. I

    asked by Ted
  80. World History

    What is the significance of James Buchanan? My answer: James Buchanan is significant because he won the election of 1856 and became the president of the United States.

    asked by Victoria
  81. math

    Lamar deposits 5000 into an account that pays interest at 4% per year. How much interest wilk he be paid in the first 3 years

    asked by latasha
  82. statistics

    *Give all probabilities to four decimal places. Bowl #1 contains 4 grape candies, 5 lemon candies, 6 cherry candies and 5 raspberry candies. Bowl #2 contains 8 grape candies, 5 lemon candies, 4 cherry candies and 3 raspberry candies. (c) What is the

    asked by Anonymous
  83. Literature

    Douglass includes a lot of maxims in his Narrative. What is the effect of these? They make his autobiography less believable because some of them are not true. He reveals many of the values of the people during the time in which he lived. They demonstrate

    asked by Caren
  84. World History

    What is the significance of John C. Fremont? My answer: John C. Fremont is significant because he became a national hero for his explorations in the West, which earned him the nickname the "Pathfinder?"

    asked by Victoria
  85. Math

    Find the missing number in this pair of equivalent ratios. _:12 : 36 and 8 : 4 : 12

    asked by Cherie
  86. algebra

    if lamar has scored 99,71,58 and 73 on his previous four tests, what score does he need on his next test so that his average is 79?

    asked by Kelli
  87. physics

    A boy coasts down a hill on a sled, reaching a level surface at the bottom with a speed of 6.2 m/s. If the coefficient of friction between the sled's runners and snow is 0.060 and the boy and sled together weigh 480 N, how far does the sled travel on the

    asked by crystal
  88. Geometry

    How many ordered triples (a, b, c) of positive integers are there which satisfy the equation a + b + c = 10 ?

    asked by John
  89. English

    1. Wilma found a love for running. 2. Wilma found love for running. (Which one is correct?) 3. Wilma tried hard to be able to walk again. (What is the part of speech of 'to be able to walk again'? Is it the object of 'tried'? Or is it an adverbial phrase

    asked by rfvv
  90. college algebra

    Given the following quadratic equation, find;? a. the vertex b. the axis of symmetry c. the intercepts d. the domain e. the range f. the interval where the function is increasing, and g. the interval where the function is decreasing h. Graph the function.

    asked by zachary
  91. Algebra

    Find the number of integer quadruples (a,b,c,d) with 0\leq a,b,c,d \leq 100, such that a and b are the roots of the quadratic equation x^2-cx+d=0, while c and d are the roots of the quadratic equation x^2-ax+b

    asked by John
  92. math

    an athlete. an run in 6 miles in 51 minutes. at this rate approximately how far could the runner go in 1.5 hours? A. 0.2 miles B. 8.5 miles C. 10.6 miles D. 12.75 miles

    asked by mary
  93. Chemistry -need help in solving problem

    The solubility of a gas at 7.0 atm of pressure is 0.52 g/L . How many grams of the gas would be disolved per 1.0 L if the pressure increased 40 percent?

    asked by Joy
  94. engineering science N4

    Two ships leave port simultaneously. Ship A sails north-west at 30 km/h and ship B sails S 40 degrees W at 30 km/h. Calculate the velocity of ship B relative to the velocity of ship A.

    asked by sihle
  95. Chemistry

    How much heat (in Joules) is needed to raise the temperature from -79oC to 57oC for 31.5g of water? I remember my teacher using different temperatures for each equation, can someone show me what that is? thanks.

    asked by Denny
  96. finance

    What is the future value of $700 deposited for one year earning a 8% interest rate annually

    asked by Anonymous
  97. statistics

    Bowl #1 contains 4 grape candies, 5 lemon candies, 6 cherry candies and 5 raspberry candies. Bowl #2 contains 8 grape candies, 5 lemon candies, 4 cherry candies and 3 raspberry candies. (c) What is the probability that the two selected candies are the same

    asked by Anonymous
  98. chem

    what mass of aluminum is deposited electrolytically in 30 minute

    asked by what mass of aluminum is deposited electrolyticall
  99. Analytic Geometry - Reflecting points over lines

    Let P = (5,1), and let Q be the reflection of P over the line y = 1/2x + 2. Find the coordinates of Q. I don't understand how to start? Should we draw perpendicular lines? Analytic Geometry - Reflecting points over lines - Steve, Monday, March 4, 2013 at

    asked by Knights
  100. business english

    1.which of the following sentences is accurate in terms of the words it uses? a. there is alarge amount of people at the convention. b. we have to decide between the four options available to us. c.fewer people will attend the conference this year because

    asked by shirley
  101. arithmetic

    find the APR to the nearest half percent, for the following data. purchase price $3500, down payment $500, add-on interest rate 7%, # of payments 18

    asked by ken
  102. Chemistry

    In the equation Q = mc(deltaT), I learned that Q means heat transfer. Is it the heat transfer from the system to the surroundings, i.e. the system loses/absorbs heat or is it from the surroundings to the system? A couple of places on the Internet say that

    asked by a Canadian
  103. Honors Chemistry

    When 6 grams of acetic acid and 8.4 grams of sodium bicarbonate react, how many moles of CO2 is produced? I don't know how to show the work.

    asked by Brandie
  104. math

    Lamar deposits 5000 into an account that pays interest at 4% per year. How much interest wilk he be paid in the first 3 years

    asked by latasha
  105. history

    2. It's believed that the role of feasts in the Ice Age was to A. strengthen group ties. [B.] mark times when food was abundant. C. celebrate weddings. D. celebrate the resolution of serious conflicts. i think this is the answer but i couldn't find it in

    asked by Anonymous
  106. Science

    How does the temperature change in the sun's atmosphere differ from the temperature change in the sun's interior?

    asked by Anon
  107. Programming

    I must write Analysis, IPOChart, Hierarchy Chart, Flowchart, GUI Design, Pseudocode, and Test Cases for an office supply inventory tracking program Here is the Pseudocode that i have so far: Main Module 1 Declare PensAmount As float 2 Declare PaperAmount

    asked by Jim
  108. Finite, Math, Probability

    Assume that there are 18 board members: 12 females, and 6 males including Larry. There are 3 tasks to be assigned. Note that assigning the same people different tasks constitutes a different assignment. Find the probability that both males and females are

    asked by Cayla
  109. Physics

    A battery with an emf of 7.9 V and internal resistance of 1.37 Ω is connected across a load resistor R.If the current in the circuit is 0.88 A, what is the value of R? Answer in units of Ω What power is dissipated in the internal resistance of the

    asked by Tiffany
  110. social studies!!!

    I left my textbook in my locker...again. sorry If u can find me a website to help me...great...if u can answer them...even better!! 1. Would shipping be easier to block in the gibralter or bosporus strait? Why? 2.what countries rely on the strait of hormuz

    asked by leslie
  111. math

    smallest golf ball has a volume of 2.48 cubic inches. If the diameter is increased bt a factor of 1.1 what will the volume of the golf ball be?

    asked by Kory
  112. Algebra

    What is \left \lfloor ( 3 + \sqrt{5} ) ^3 \right \rfloor?

    asked by John
  113. Math

    A drawer contains n socks. When two are drawn randomly without replacement, the probability that both are red is 5/14. What is the smallest possible value of n

    asked by Maria
  114. Algebra

    How many integers from 1 to 19999 have exactly 15 divisors?

    asked by John
  115. math

    If a car holds 16 gallons of gas. If 3/4 of a tank was used how man gallons was used?

    asked by Anonymous
  116. pentagon...GEOMETRY

    ABCDE is a regular pentagon. FAD is an equilateral triangle, such that points F and E are on the same side of line AD. What is the measure (in degrees) of ∠FAB?

    asked by Anonymous...urgent!
  117. Physics

    If the emf of a battery is 23 V and a current of 66 A is measured when the battery is shorted, what is the internal resistance of the battery? Answer in units of Ω How would you set up the equation to solve?

    asked by Tiffany
  118. chem

    Calculate the mass of copper and volume of oxygen (at 25 C And 760 mmHg) that would be produced by passing a current of 0.5 A through a CuSO4 solution between Pt electrodes for 3

    asked by Anonymous
  119. Eniglish

    "The story of Daedulus and Icarus"Teaches that: A. the gods reward those who are invesntive. B. the gods will reard those who undertake great risks. C. humans should strive to reach the status of gods. D. humans should not strive to reach the status of

    asked by Ciara
  120. physics

    An electron is projected, with an initial speed of vi=1.38e+05 m/sec, directly towards a proton that is essentially at rest. If the electron is initially a great distance from the proton, at what distance from the proton is its speed instantaneously equal

    asked by x
  121. organic chem

    Amide formation: draw the structure (or provide the IUPAC name) of the amide formed (appropriate coupling reagent required) between benzoic acid and N-ethyl ethanamine (diethyl amine)

    asked by meghan
  122. Chemistry

    Ammonia is used as a fertilizer throughout the world. It is often produced by reacting nitrogen gas with hydrogen gas in a synthesis reaction. How much ammonia in grams can be produced from 9207 grams of nitrogen and 44 000 L of hydrogen?

    asked by Michelle
  123. Physics

    In a target shooting game, wooden blocks are thrown into the air and shot in flight. A block of 0.8kg has a speed of 10 m/s at the top of its trajectory when it is hit by a bullet from below at an angel 60° from horizontal. The mass of the bullet is 5.0 g

    asked by Mike
  124. Chemistry

    I want to have the details of the experiment title: Determine the equilibrium constant of a reversible reaction involving the iodine and the tri iodate ion reaction and also determine the gibbs free energy of the reaction.

    asked by Rani
  125. Chemistry

    Calculate the morality of a solution that contains a 4.0 mol of a solute dissolved in 12.0L of solution

    asked by Francesca
  126. Math- Problem solving

    A number has 4 digits. The digit in the hundredths place us greater than the digit in the hundredths place of 4.361. The digit in the tousandths place is greater than the digit in the tenths place of 2.85. What are the possible four-digit numbers between

    asked by Joelle
  127. math

    an athlete can run 6 miles in 51 minutes. at this rate, approximately how far could the runner go in 1.5 hours

    asked by mary
  128. chemistry

    calculate the volume of the hydrogen that will combine with 40 litres of oxygen to form steam at 150 C and atmospheric pressure

    asked by bidha
  129. chemistry

    calculate the volume of the hydrogen that will combine with 40 litres of oxygen to form steam at 150 C and atmospheric pressure

    asked by bidha
  130. Physics

    A car is travelling along a highway with a speed of 25 m/s when the driver sees an obstruction 1.80*10^2 m directly ahead. It takes the driver 0.80s to react and begin braking. a) How far does the car travel before it begins to slow down? b) How long will

    asked by Mike
  131. Physics

    A 200-pound boy lifts a 40-kilogram box off of the floor 1.3 meters in 0.7 seconds. His brother lifts a 48-kilogram box off the floor 0.9 meters in 0.6 seconds. Which boy is more powerful? Explain.

    asked by Kayla
  132. english

    How would I fix this sentence fragment? Or is it correct as is? If a woman from the desert tribe showed anger toward her husband, she was whipped in front of the whole village. And shunned by the rest of the women.

    asked by Taylor Beach
  133. English

    How would I fix this fragment sentence? Or is it fine the way it is? With machetes, the explorers cut their way through the tall grasses to the edge of the canyon. Then they began to lay out the tapes for the survey.

    asked by Taylor Beach
  134. Physics

    In a target shooting game, wooden blocks are thrown into the air and shot in flight. A block of 0.8kg has a speed of 10 m/s at the top of its trajectory when it is hit by a bullet from below at an angel 60° from horizontal. The mass of the bullet is 5.0 g

    asked by Mike
  135. math

    Find the slope m of the tangent line to the graph of the function at the given point and determine an equation of the tangent line. f(x)=7x-5x^2 at (-2,-34) m = ?? y = ?? .

    asked by Kimberly
  136. math

    the pet shop owner told Jean to fill her new fish tank 3/4 full with water. Jean filled it 9/12 full . what fraction of the tank does Jean still need to fill?

    asked by jessica
  137. Calculus

    Determine convergence or divergence for the following series. State the tests used and justify your answers. Sum (infinity, n=1) 1/(1+e^-n) Sum (infinity, n=1) (2*4*6...2n)/n! Sum (infinity, n=0) (n-6)/n Sum (infinity, n=0) (n-6)/n! Sum (infinity, n=0)

    asked by Jade
  138. math

    Find the derivative of the function f by using the rules of differentiation. f(x)=(9x^3+3x^2+10x-6)/(x)

    asked by Kimberly
  139. chemistry

    Hey, I was just struggling with a question that I need to figure out to help me with my next lab, so if any of you guys could help me that would be greatly appreciated. Question: write a balanced equation for the reaction between H2O2 and acidified MnO4-

    asked by alex
  140. Chemistry

    Suppose a can of aerosol contains a residual amount of gas at pressure of 755mm Hg and a temperature of 25C. What would the presure be if the can were to be heated to 1155c?

    asked by Amee
  141. physics

    A 51.4 N force is applied to the outer edge of a door of width d = 2.72 m a) Find the torque when the force acts perpendicular to the door. N · m (b) Find the torque when the force acts at an angle of è = 11.5° with respect to the door surface. N · m

    asked by cobra
  142. Life orientation

    What according to the basic conditions of employment act applies wt regard to the contravention to working 50 hours per week.?

    asked by Kholofelo
  143. Physics

    A force of 20 N acts toward the west. Another force acts at the same point so that the resultant of the two forces is zero. What is the magnitude and direction of the second force?

    asked by Shelby
  144. College Algebra

    A calculator company produces a scientific calculator and a graphing calculator. Long-term projections indicate an expected demand of at least 100 scientific and 80 graphing calculators each day. Because of limitations on production capacity, no more than

    asked by Anonymous PLEASE HELP!
  145. math

    an athlete can run 6 miles in 51 minutes. at this rate, approximately how far could the runner go in 1.5 hours

    asked by mary
  146. help with physics

    (a) The current through a wire is a steady 2.5 amps. How much current passes through it between t = 0 seconds and t = 4 × 10-4 seconds? (b) The current through a wire is given by I(t) = I0e -at, where I0 = 2.5 amps and a = 6 × 103 s-1. How much electric

    asked by lindsey
  147. help with physics

    A bird stands on a bare power line carrying 2500 amps of current. 600 meters of this wire has a resistance of .009 ohms. If the bird's feet are 3 cm apart, what is the voltage difference between the bird's feet?

    asked by lindsey
  148. chemistry

    What volume of oxygen would be required for the complete combustion of 23.4g of benzene, C6PO4?

    asked by ally
  149. English

    The theme of destiny figures most prominently in: A: "The Prodigal Son" B: "Goha and the Pot" C: "The White Snake" D: "The silver pool" Answer: B ?

    asked by Ciara
  150. SCIENCE 8 PLEASE HELP!!!!!! (ASAP!)

    HW - Bring in a weather map plz help....do i have to get an old one or .... idk please help

    asked by Laruen
  151. psychology

    1. A recent study confirms that people who run regularly, live longer. How can one explain that? 2. More retired people die each year than those who have not retired. Does this mean that delaying retirement will increase one's life expectancy? Explain.

    asked by jenna
  152. statistics

    Percentage grades in a large physics class follow a normal distribution with mean 58. It is known that 3% of students receive grades less than 39.2. What is the standard deviation of grades in the class?

    asked by Anonymous
  153. Art

    Using the knowledge of public art gained during this lesson, critique your peers' artwork. Give three examples that will allow them to improve what they have created.

    asked by Bella
  154. Geometry

    A 12 by 12 by 12 cube has all its faces painted blue. It is then broken down to 1728 individual 1 by 1 by 1 cubes. The probability that a randomly chosen 1 by 1 by 1 cube has exactly 2 faces painted blue is \frac {a} {b} , where a, b are coprime. What is

    asked by John
  155. organic chem

    Hydrolysis: draw or name the products of hydrolysis of sec butyl 2-methylbenzoate Thank you I know you cant draw them but the names of products would be helpful.

    asked by meghan
  156. algebra

    A number, greater than or equal to 2, is called product-perfect if it is equal to the product of all of its proper divisors. For example, 6=1×2×3, hence 6 is product perfect. How many product-perfect numbers are there below 50?

    asked by Anonymous...urgent!
  157. algebra!

    The difference of the cubes of two consecutive odd positive integers is 400 more than the sum of their squares. Find the sum of the two integers.

    asked by Anonymous...urgent!
  158. geometry(rectangle)

    Given a 100 by 100 square grid, what is the most number of 1 by 51 rectangles that we can cut out of it?

    asked by Anonymous...urgent!
  159. math

    Let f be defined as follows. y=f(x)=x^2-12x (a) Find the average rate of change of y with respect to x in the following intervals. from x = 5 to x = 6 ?? from x = 5 to x = 5.5 ?? from x = 5 to x = 5.1 ?? (b) Find the (instantaneous) rate of change of y at

    asked by Kimberly
  160. MATH

    WHAT is the the mystery number A=B+5,B=C+7,C=the different between13and9.D=A-B. A= B=, C=, D=

    asked by Anonymous
  161. Statistics

    A company that manufactures exercise machines wanted to know the percentage of large companies that provides on-site health club facilities. A sample of 240 such companies showed that 96 of them provide such facilities on site. a. What is the point

    asked by Steven
  162. Math

    Stupid question time. I need to figure out how to rearrange equations to solve for x in my chemistry homework, which involves putting equations in quadratic form first. But I can't for the life of me remember how to "rearrange" them correctly. So what in

    asked by Marcus
  163. math

    The thompson family's new deck is 19 2/5 feet long. There is 12 inches in 1 foot. What is the length of the deck in inches?

    asked by Anonymous
  164. math

    Write the following as an inequality -8 is less than x and 2 is greater than x. Use x only once in inequality

    asked by latasha
  165. math

    7/8 + 1/10 find the sum or difference. write the snswer in simplest form

    asked by beth
  166. math

    Find the derivative of the function f by using the rules of differentiation. f(x)= 4x^4/3-2/3x^3/2+7x^2-3x+1

    asked by Kimberly
  167. World History

    What is the significance of the Republican Party?

    asked by Victoria
  168. math

    A four-digit number between 12 and 13 has an odd number in the hundredths place and an even number in the tenths digit. The sum of the tenths and hundredths digit is 9. What are the possible four-digit numbers?

    asked by Joelle
  169. Algebra

    A ball is thrown upward with an initial velocity of 14 meters per second from a cliff that is high. The height of the ball is given by the quadratic equation where h is in meters and t is the time in seconds since the ball was thrown. Find the time that

    asked by Sherry
  170. Algebra

    Alan and Bob are playing with numbers. Starting with the number n=1 they take turns performing arithmetic manipulations with n. Alan goes first and always multiplies n by 3. Bob adds 1 or 2 to the number n, depending on a coin toss. A number is called

    asked by John
  171. chemistry

    An aqueous solvent of NaCl has a melting point of –165C How many moles of NaCl are present in a 189 g solvent?

    asked by breseida
  172. math

    A Model M3SWE mandolin has a list price of $1299.90, with a chain discount of 5/3/2. (A) What would be the trade discount amount? (B) What would be the net price?

    asked by Melissa
  173. Math

    A number line starts with 7 and ends with 9.There are 7 marks in between. The letter A is above the 5th mark. What is the value of A as a fraction

    asked by Mary
  174. math

    a race track is a mile around circle which equals 5,280 circumference. To find the diameter (the the width of the center of the circle) do I divide the 5,280 by 2?

    asked by Sandy
  175. Math

    You have to use 3,500 calories to lose one pound. If you play Dance Dance Revolution you can burn 1,000 calories in an hour. How many hours would you have to play in order to lose one pound? Answer is 35 3500 divided by 1,000=35 please help Ms. Sue i think

    asked by Juan
  176. Physics please help!!

    Assume a circular orbit. If a planet's distance from it star is multiplied by 25 times, then by how many times is its orbital period T multiplied ?

    asked by Jose
  177. more of the same

    The answer to this should be 201.7, but I keep getting off track. 300=70+(375-70) e^ -k*10 230=305 e^-10*k ln 230=ln 305 e^-10*k ln 230= ln 305 -10*k

    asked by Phoebe
  178. Chemistry

    How much heat (kcal)is needed to melt 14 ice cubes? Each cube is at 0c and has a mass of 28grams.

    asked by Brittany
  179. Physics

    An electric filament can heat 200 cm3 of water from 5°C to 95°C in 6 minutes. If the voltage source is a 12 V battery, how much current does it draw?

    asked by lindsey
  180. Algebra

    the number of state and federal inmates in millions during year x were x more or less than 2002 can be approximated by the following. N=0.03x -59.02. Determine the year there were 1.1 million inmates.

    asked by Ruth
  181. college algebra

    given the following polynomial find the zero and multiply of each were the graph touches the x axis number of turning points fx =(x-4)(x^2-25)

    asked by zachary
  182. math

    please display graph of 2x=1 (if can be) thanks

    asked by john
  183. Geography

    what is the names of the three small pyramids in front of the gizzza

    asked by whiz Kid
  184. English

    Sigmund Freud coined the term _______,which he applied to people who were extremely self-absorbed. A. Dryad B. suspension of disbelief C. moral D. narcissistic Answer: B?

    asked by Ciara
  185. help with physics

    A gold wire and a silver wire have the same dimensions. At what temperature will the silver wire have the same resistance that the gold wire has at 20°C?

    asked by lindsey
  186. algebra

    A line with a slope of -2 passes through the point (1, 7). What is the closest point on the line above (1, 7) which has whole number coordinates?

    asked by becky
  187. Algebra

    The difference of the cubes of two consecutive odd positive integers is 400 more than the sum of their squares. Find the sum of the two integers.

    asked by John
  188. chemistry please help!!

    what is the net ionic equation for the reaction between a strong acid and a strong base? what does it mean by this question?/ (: thanks.

    asked by yvette
  189. sciences

    A solution contains 0.0180 M HNO3, 0.0268 M HI, and 0.250 M formic acid, HCOOH. What is the pH?

    asked by carl
  190. Calculus

    Determine if the series converges or diverges. Sum (n=1, infinity) (2*4*6...2n)/n! My main problem is I have no idea what to do with the numerator.

    asked by Jenny
  191. Math

    A carton of Girl Scout cookies weighs 15 Lb. Each carton contains 36 boxes of cookies. How many boxes of cookies would 43 cartons contain?

    asked by Gaga
  192. Psychology

    How could my wife and I find out whether the South Beach Diet works for us? Write the methods section for an experiment.

    asked by jenna
  193. org. chem

    Give IUPAC name of the products of the dehydration of this alcohol? 2-ethyl cylcopentanol

    asked by meghan
  194. Physics

    Develop a model for the effective gas mileage (call it E) as a function of speed (S) for a ¡°typical¡± car (you should be able to find the necessary information to develop this model for your own car). This model should be valid for 55 ¡Ü S ¡Ü75

    asked by Henry
  195. math

    if 2 socks are chosen at random,what is the probality of getting first a black sock and then a blue sock?

    asked by ahmedin
  196. Math

    1/4 /5=

    asked by Kim
  197. psychology

    What implications do the results of an experiment have for subjects that were not observed in the experiment?

    asked by jenna
  198. algebra

    a certain mountain has an elevation of 19523 feet. in 1922, the glacier on this peak covered 5 acres. by 2001 this glacier had melted to only 1 acre.

    asked by keisha
  199. GEOmetry

    How many 7 digit positive integers are there such that the product of the individual digits of each number is equal to 10000?

    asked by Anonymous...urgent!
  200. Algebra

    The difference of the cubes of two consecutive odd positive integers is 400 more than the sum of their squares. Find the sum of the two integers.

    asked by John
  201. Algebra

    Alan and Bob are playing with numbers. Starting with the number n=1 they take turns performing arithmetic manipulations with n. Alan goes first and always multiplies n by 3. Bob adds 1 or 2 to the number n, depending on a coin toss. A number is called

    asked by John
  202. English

    The assignment is to write a CAUSE paper on an addiction. There is to be three topic sentences with support, a thesis, an introduction and a conclusion. I obviously have left of my sources, and need to insert them. I would really appreciate some feedback

    asked by BL
  203. Geometry

    ABC is a right triangle with AB = 2, BC = 8\sqrt{3} and AC = 14. What is the value of \sec \angle BAC?

    asked by John
  204. life orientation

    what,according to the basic conditions of employment act applies with regard to the contraventions?

    asked by shammy
  205. TRIGONOMETRY HELP

    Prove that: (tan²Θ)x(sin²Θ) = (tan²Θ)-(sin²Θ) show work

    asked by CARL
  206. Algebra

    Find the number of integer quadruples (a,b,c,d) with 0\leq a,b,c,d \leq 100, such that a and b are the roots of the quadratic equation x^2-cx+d=0, while c and d are the roots of the quadratic equation x^2-ax+b.

    asked by John
  207. Algebra

    A mountain has an elevation or 19,389 feetin 1918, the glacier at the peak covered 4 acres, by 2003 this glacier had melted to 1 acre. What was the yearly rate of change. What is the equation that gives the acreage t years after 1918

    asked by Ruth
  208. geometry!

    Given a 100 by 100 square grid, what is the most number of 1 by 51 rectangles that we can cut out of it?

    asked by Anonymous...please help!
  209. College Algebra

    A calculator company produces a scientific calculator and a graphing calculator. Long-term projections indicate an expected demand of at least 100 scientific and 80 graphing calculators each day. Because of limitations on production capacity, no more than

    asked by Anonymous PLEASE HELP!
  210. math linear alegba

    Find the distance from the point (1, 1, 1) to the line given as the intersection of planes x+2y− 2z = 5 and 6x − 3y + 2z = 8.

    asked by liam
  211. MATH

    FIND A AREA OF SQUARE ROOM WHOSE SIDE IS 6CM. THE FLOOR OF ROOM IS TO BE TILLED WITH SQUARE TILES HAVING A SIDE OF 60CM.FIND THE NO.OF TILES REQUIRED

    asked by SAKSHI
  212. Analytical Chemistry

    How many milliliters of 0.202 M KOH should be added to 500.0 mL of 0.0233 M tartaric acid (C4H6O6; FW 150.087) to adjust the pH to 2.75? Ka1 = 1.0 x 10-13 and Ka2 = 4.6 x10-5. For this one, the Ka1 seems sort of off. The pka would be 13 which doesn't make

    asked by Micki
  213. Science

    How do i obtain the vapor pressure of Molten syrup?

    asked by Pride
  214. collegemath

    How high is a wall that cast A 7ft shadow at the same time a 5ft flag pole casts a 5ft shadow

    asked by tim
  215. Calculus

    Determine convergence of divergence. If convergent, find the sum. Sum (infinity, n = 0) (e/pi)^n

    asked by Jade
  216. Math

    A fisherman has estimated that it takes 6minutes to paint each square foot of the hull of his boat. How much time should the fisherman allow for the painting of the hull, if the hull were composed of two sides, each 31.5 feet by 8.99 feet?

    asked by Kas
  217. Chemistry

    You are given a compound with an unknown concentration and you have five samples with known concentration of the compound. List 3 pieces of information you need to determine in order to calculate the unknown concentration spectrophotometrically.

    asked by Anonymous
  218. math

    A man earns #3500 per month out of which he spends 15 percent on his children's education. If he spends additional #1950 on food, how much does he have left?

    asked by Sifon
  219. math

    A man earns #3500 per month out of which he spends 15 percent on his children's education. If he spends additional #1950 on food, how much does he have left?

    asked by Sifon
  220. math

    A man earns #3500 per month out of which he spends 15 percent on his children's education. If he spends additional #1950 on food, how much does he have left?

    asked by Sifon
  221. Math

    Same kind of problem. How to rearrange to put an equation in quadratic form. Example I'm given is 49.7= 2x^2 / (1.00-x)(2.00-x) which should come out to .920x^2 -3.0x + 2.0 but I can't figure out exactly how to get to there, especially how to get the x

    asked by Marcus
  222. Chemistry

    Caslcualte the formula massfor each of the following compunds CS2 C6H12O6 Fe(nO3)3 C7H16

    asked by Amee
  223. math

    the points x,3 and -2,2 have a slope of 1/4. what is the x-coordinate of the point x,3?

    asked by keke
  224. COM/330

    what are Real-world Systems Theory examples?

    asked by Anita Fields
  225. math

    can someone tell me if this is right T=1/5(x-y+z) = x+z-y and can someone please help me with this one F(x)=x^2-6x-27 / x^2-1

    asked by mace
  226. physical science

    Boyle’s law states that if you squeeze a fixed amount of a gas into a smaller volume, the pressure will increase. Explain why?

    asked by alex
  227. English

    1. I go to a museum to see pictures. 2. I go to a museum to watch pictures. 3. I go to a museum to look at pictures. (Which one is commonly used?)

    asked by rfvv
  228. english

    what would a thesis statement be for Old Jules by Mari Sandoz

    asked by Em
  229. math- exponents and logs

    5,000=55.66 (1.114)^x (i.e. What is x?) ln 5,000= x ln 55.66 1.114 I keep getting 2 point something, but does this make sense? My calculator display looks like this: ln 5000/ln (55.66)(1.114)

    asked by Phoebe
  230. physical chemistry

    This question is about a lab called Heats of Ionic Reaction in my Physical Chemistry class. I need to know why there should be a large percentage error in deltaH4

    asked by shelby
  231. Maths

    The sum of two whole number is 23.The different between them is 5.What is the smaller number?

    asked by Zen
  232. Algebra

    How many integer values of x are there such that |x-3| + 5 < 16 ?

    asked by John
  233. Math

    What times what equal 60 and adds to get 7

    asked by Morgan
  234. math

    Red=1 blue=1 Hans spent 6 minutes painting each of his fence posts. What fraction of his fence posts did he paint red and blue? How long did it take him to paint the red and blue posts?

    asked by Bianca
  235. Maths

    The sum of two whole number is 23.The different between them is 5.What is the smaller number?

    asked by Zen
  236. math help! Help!

    The doctor estimates that more than 220 of the 500 patients in his database take a vitamin each day. A random sample of 60 patients shows that 27 of them take a vitamin each day.

    asked by Anonymous
  237. math

    f(x)=x^2-6x-27 over x^2-1 find the domain T=1/5(x-y+z)

    asked by can someone please help
  238. help(reading)

    when a teacher tells you whats your novel, what does he or she mean?

    asked by help
  239. Analytic Geometry - Reflecting points over lines

    Let P = (5,1), and let Q be the reflection of P over the line y = 1/2x + 2. Find the coordinates of Q. I don't understand how to start? Should we draw perpendicular lines?

    asked by Knights
  240. Algebra

    x and y satisfy 2^x = 5 and 5 ^ y = 64. What is the value of xy?

    asked by John
  241. Reading

    What is a 2nd grade pronoun definition

    asked by Daviana
  242. math

    hi my name is Hannah and I need help with my math homework it is something to do with multiplying trapezoids and triangles? Also, what are the formula for the shapes so that way i would be able to do my homework? THANKS FOR THE HELP!!!!!!

    asked by hannah
  243. math

    an athlete can run 6 miles in 51 minutes. at this rate, approximately how far could the runner go in 1.5 hours

    asked by mary
  244. Math please help

    7. The doctor’s assistant claims that at least 350 of the 500 patients have seen the doctor in the past year. A random survey of 45 patients shows that 18 have seen the doctor in the past year. Is the assistant’s claim likely to be valid? Explain.

    asked by Josiah
  245. Shayna

    Find the value of a so that the function f(x) = xe^(ax) has critical point at x = 9 I found that the derivative is axe^(ax)+e^(ax) But I am not sure where to go from here?

    asked by Calculus
  246. chem

    two cells are connected in series.one contains alcl3,and the other contains agno3 as the

    asked by Anonymous
  247. human resources

    Some recent studies indicate that nine out of ten employers observe the electronic behavior of their employees, from tracking their Web-surfing habits to implanting GPS tracking chips in their arms. Discuss whether managers are justified in monitorin

    asked by Anonymous
  248. math

    F(x)=x^2-6x-27 over x^2 -1 is the answer -4 and for T=1/5(x-y+z) is this answer correct x+z-y

    asked by To Damon
  249. math

    hi i wanted to know what is 1.8387 rounded three decimal places please im stuck

    asked by Lisa
  250. calculus

    Find the derivative of the function. f(x) = 9/((7x^2-12)^(1/2))

    asked by Brandi
  251. Calculus

    Suppose that 3

    asked by bryan
  252. math

    an example of play that relates to a curriculum standard in mathematics for preschoolers?

    asked by Anne
  253. algebra

    4.782 X 10^13

    asked by T-perry
  254. math

    -5x-2.34=5.9 i got x=-1.648 is that correct what is -13=10-x/2 i don't understand how do you solve this?

    asked by Anonymous
  255. Algebra

    What are the sum of the roots of f(x) = x^2 - 16x + 63?

    asked by John
  256. algebra

    simplify x+2/3x-6 * x^2-3x+2/x^2-x-6 and -7/2 + 3-x/x

    asked by mace
  257. English

    The central theme in both "Steal Away" and "Go Down, Moses" is: A: Sinners will pay for their sins. B: slaves will one day be free. C: God has a thunderous voice. D: Slaves should be obedeint. Answer C ?

    asked by Ciara
  258. math

    Mia gave 1/3 of her 24 marbles to david. how many did daviv get? I said 8

    asked by may
  259. math

    how meany days are left in school 12:40pm 3/4/2013

    asked by Anonymous
  260. English

    For the speaker in "Local Sensibilities," pineapples represent: A: his favorite food. B: a Thankgiving ham. C: tourist D:work Answer B ?

    asked by Ciara
  261. psychology

    A friend of mine finished fourth in her age group in the world duathlon (run, ride, run). She has two bicycles that differ along several variables, but she isn’t sure which one will be best for the next season. How could she find out? Write the methods

    asked by jenna
  262. math

    1 can OJ is 15% 1 can is 10% how many liters of each should be mixed together to get 5 liters at 13%

    asked by Rick
  263. Psychology

    I know a man who read to his 5 children every night before they went to bed, and they all could read before entering preschool. Suppose that this were true of all children we could find who were read to every night before going to bed but true of only a

    asked by jenna
  264. psychology

    The first year after the speed limit was reduced to 55 mph was the first year since there was a federal speed limit that no one in the United States who was observing the speed limit died in an auto accident. What does this prove?

    asked by jenna
  265. math

    -5x-2.34=5.9 i got x=-1.648 is that correct what is -13=10-x/2 i don't understand how do you solve this?

    asked by Anonymous
  266. chemistry

    A white solid was found in an unmarked bag. Describe an experiment that can be set up to determine if the solid is either MgSO4*10H2O or KCL*2H2O

    asked by Rachel
  267. Stat

    Suppose there are 2 black, 3 white, and 5 red marbles in an urn. You reach in and randomly select 3 marbles without replacement. And let X be the number of black marbles. Find the probability table for X.

    asked by Stephanie
  268. Physics II

    It is ~ 100 miles of mostly interstate driving to camp. Using your model from parts (b) and (c), how much does it cost me to drive to camp if I drive 55 mph, 65 mph, and 75 mph? (don’t forget the return trip) the current price of gas for part c is

    asked by Henry
  269. Physics III

    The “average” driver drives ~15,000 miles per year. Let’s assume ~10,000 miles of that is interstate driving. Using your models from parts (b) and (c) again, how much does the average driver spend per year if their average speed is 55 mph, 65 mph,

    asked by Henry
  270. KittyKitKatKoo

    Does anyone know why the Germans might not have talked about the Holocaust until years after the war had ended? Thanks!!

    asked by Holocaust Question??
  271. math

    what is 117.04 in scientific notation

    asked by pat
  272. Calculus

    Given that \displaystyle \int_0^4 x^3\sqrt{9+x^2} dx = a, what is the value of \lfloor a \rfloor?

    asked by John
  273. psychology

    Suppose that you have developed three new kinds of hair shampoo, and you want to know how people's preference depends on their age. Design an experiment to find out.

    asked by jenna
  274. math

    x+2/3x-6*x^2-3+2/x^2-x-6

    asked by help please
  275. algebra

    6x^2-x-15

    asked by Anonymous
  276. algebra 2

    A diamond is purchased for $3500. Its value increases 5% each year. Find the value of the diamond after six years.

    asked by Anonymous
  277. Math

    What is 75/31in simplest form

    asked by Brayan
  278. Calculus

    At what value of x does the graph of y=9x^(1/3)+x^2 have a point of inflection?

    asked by Raul
  279. trig

    use an angel sum identity to verify cos2theta = -2cos^@-1

    asked by cooper roschuk
  280. English II

    Expand each sentence below by adding words or phrases that modify the verb. Questions after each item suggest details you can add. 1.Prehistoric paintings were found. 1. How were the paintings found? 2. Where were the paintings found?

    asked by Carlos
  281. college chemistry

    if my sublimation apparatus imploded, what was the cause of it?

    asked by Anonymous
  282. World History

    What is the significance of Roger B. Taney ?

    asked by Victoria
  283. algebra

    -2x-4y=1 12y=-6x-3 I have to find the solutions, or no solution, or infinite solutions to these two equations.

    asked by DJDiamond
  284. physics

    Suppose we have |ϕ⟩=∑y∈{0,1}nβy|y⟩ such that βy=0 if s⋅y=1mod2 and βy=12(n−1)/2 if s⋅y=0mod2, where s is some hidden n-bit string. (a) If we run Fourier sampling on |ϕ⟩, what is the probability that we see s?

    asked by s
  285. math

    solve for v round your answer to the nearest tenth 13/7= v/8

    asked by mace
  286. Maths

    Help me rearrange this equation, v=20-9.8t

    asked by Gerad
  287. math

    what is the formula for working out open cuboid.

    asked by roy
  288. math

    what is the formula for working out open cuboid.

    asked by roy
  289. math

    To make one bowl of party punch. 4 3/4 cupps of soda is used. How many cups of soda would you need to make 3 bowls of party punch?

    asked by Kody
  290. math

    Kevin Made five shirts. Each shirt used 2/3 yard of cloth. How many yards did he need in all?

    asked by Anonymous
  291. Geometry

    line xy bisect and is perpendicular to ab and cd. ab=6 and ap=5 what is the length of xy

    asked by Ashley
  292. physics

    Sara walks at 1.50 m/s. She notices Emily is standing at the coffee shop ahead so she accelerates at 1.55 m/s ^2. How far is emily ?

    asked by Alison
  293. math

    what is 5-2x=13+2x

    asked by Anonymous
  294. finding the x value

    Find the value of x 19 x 27

    asked by makayla
  295. math

    what is 21/2 x 1/2

    asked by jake
  296. Chemistry

    1) Determine the Kc for the following experimental conditions: compound A+compound B --> Compund D Compound: A B M 0.003 0.0023 Volume used: 5 mL 8 mL Total volume = 25 mL, using graph 2 and a %T of 24 for compund D molecular weight compund D = 535 g/mol

    asked by Anonymous