1. algebra

    2. The level of thorium in a sample decreases by a factor of one-half every 2 million years. A meteorite is discovered to have only 8.6% of its original thorium remaining. How old is the meteorite in millions of years? 2) You need to show how you use the

    asked by sara on June 14, 2009
  2. Algebra

    I was wondering if I had number 2 correct; the only way to know the answer was to provide the entire answer for number 1. Thanks in advance. 1. Suppose that a market research company finds that at a price of p = $20, they would sell x = 42 tiles each

    asked by Ashli on June 5, 2008
  3. Algebra: x and y intercept, someone check please

    1. Find the x-intercept and the y-intercept of 8x - 2y = -24. a. x = -7, y = 2 b. x = -4, y = 14 c. x = -3, y = 12 d. x = 7, y = -2 answer: d 2. Find the x- and y- intercept of the line 2x + 3y = -18. a. x-intercept is 18, y-intercept is 18. b. x-intercept

    asked by Cheryl on May 16, 2011
  4. MATH

    (5 pts) The length, X, of a fish from a particular mountain lake in Idaho is normally distributed with \mu = 9.7 inches and \sigma = 1.7 inches. (a) Is X a discrete or continuous random variable? (Type: DISCRETE or CONTINUOUS) ANSWER: (b) Write the event

    asked by Violet on February 5, 2014
  5. Math(Please help)

    Projectile motion: Let's suppose you throw a ball straight up with an initial speed of 50 feet per second from a height of feet. a) Find the equation that describes the motion as a function of time. My answer was x = 0 and y=-16t^2+50t+6 b) How long is the

    asked by Abbey on April 16, 2010
  6. Math--Please Check!!!

    Hi, I asked this question yesterday and I was given help in how to solve it. After working the problem, I have came up with $575.27. The problem is: When Beth finishes college, she has a balance or $2876.37 on a credit card with an annual percentage rate

    asked by Logan on February 27, 2007
  7. algebra

    Also, I belive that #4 is D. I drew out a graph and it is symmetrical to point A. After looking over #3, I got B because axis of symmetry is -b/2a, so it would be 6/2(1)= 3. I need help on how to do the following problems: 1. The graph of x^2 + y^2 = 100

    asked by Anonymous on April 1, 2007
  8. Math

    The maximum possible score in an exam was 80 and all questions carried equal weightage. For each correct answer 4 marks were awarded whereas for each wrong answer 1 mark was deducted. For no answer, the marks remained unchanged. A student got 57 marks in

    asked by Anonymous on January 31, 2017
  9. Math

    The maximum possible score in an exam was 80 and all questions carried equal weightage. For each correct answer 4 marks were awarded whereas for each wrong answer 1 mark was deducted. For no answer, the marks remained unchanged. A student got 57 marks in

    asked by Anonymous on January 31, 2017
  10. chem

    How much heat is required to raise the temperature of 200 g CH3OH from 20 to 30 degrees and then vaporize it at 30 degrees. The molar heat capacity of CH3OH is 81.1 J/Mol/K. Okay...the answer is approximately around 254. It was a homework problem. The

    asked by joseph on February 15, 2010
  11. Math

    The maximum possible score in an exam was 80 and all questions carried equal weightage. For each correct answer 4 marks were awarded whereas for each wrong answer 1 mark was deducted. For no answer, the marks remained unchanged. A student got 57 marks in

    asked by Ivo on January 31, 2017
  12. Math Riddle

    How many two-digit numbers are multiples of 3 and also factors of 81? 3x=9 so try x=1,2,3,4 and see. I have been given a riddle that has driven me mad ... but worse, once given the answer. I just became baffled. Can anyone please explain why 487 is the

    asked by Nini on November 19, 2006
  13. math-urgent

    1. two cards are drawn from a standard of 52 cards. Find the probability that the second card is a spade given that the first card is a club. 2. Suppose you draw 3 cards from a standard deck of 52 cards . Find the probability that the third card is a club

    asked by temmick on April 3, 2014
  14. math

    At a bagel shop, 2 coffees and 4 bagels cost $6.00. Two coffees and 7 bagels cost $8.25. What is the unit price of one coffee and the unit price of one bagel? my answer: 1 bagel= $0.75 1 coffee= $1.00 Find the 5,550th term in the sequence 4 1/2, 5, 5 1/2,

    asked by PLEASE HELP CHECK MY ANSWER THANK YOU VERY MUCH! on April 6, 2016
  15. English

    Please suggest me the best fit in each sentence. 1. the car--------dangerously before coming to a sudden halt.(turned, swerved, screeched) my answer is "turned" 2. The Manager------------off angrily after giving them orders.(broke, stalked threatened) My

    asked by ramesh reddy on March 26, 2009
  16. statistics

    Section 5.3: Normal Distributions: Finding Values Answer the questions about the specified normal distribution. Q1: The lifetime of ZZZ batteries are normally distributed with a mean of 265 hours and a standard deviation ó of 10 hours. Find the number of

    asked by looking for someone to varify my work please on March 28, 2010
  17. Biochemistry

    I'm desperate and I cannot find the answer to this question.... As the name implies, globular proteiens tend to have a roundish, globular shape. What types of side chains might you expect to find on the amino acid residues that face the outside of a

    asked by Sam on May 8, 2007
  18. Math, data management

    How many different ten digit telephone numbers contain four 2's, three 3s, and three 7s? I tried sorting the numbers out in order 2 2 2 2 | 3 3 3 | 7 7 7 10!/2!3!7! But I couldn't find the correct solution as the answer was 4200

    asked by Deval on February 21, 2017
  19. Math problem still stuck

    Let f(x) = 1/(x+7)+15/(x-8). Find all a for which f(a)=f(a+15). I understand this so far f(a)=f(a+15) 1/(7+a) + 15/(a-8) = 1/(a+22) + 15/(a+7) I have multiplied the LCD of (a-8)(a+7)(a+22)by both sides with no luck. This is a multiple choice question a.)

    asked by Shawn on October 12, 2008
  20. maths

    The scale of a map is 1:25000.Find the actual length of a road,in cm,which is measured 7.8 cm on the map.Express the answer in standard form.

    asked by ashley on January 11, 2014
  21. algebra

    don't quite understand how to go about finding the answer to this problem. I have to find two different points for a line, graph it, and also above or below the line to show the relationship. How do I go about doing this? The equation is: 3y-8x >24 Thank

    asked by Laura on March 21, 2011
  22. Geometry

    Find the arc length, of a 130 degree arc, in a circle with a diameter of 7.2 inches. Round your answer to the nearest thousandth

    asked by Bob on May 20, 2012
  23. trig

    ABC is rightangled triangle. AD is the bisector of angle BAC. Angle DAC=15 degrees. X=CD. Find X. I know the answer is 7.1 but do not know how to do the actual sum. Can you please help.

    asked by jane on May 5, 2011
  24. calculus

    Find the average rate of change of the function over the given interval. You must reduce and simplify your answer, if possible. a. f(x)=cot x, [pi/6, pi/2] b. f(theta)= -2 + cos (theta), [-pi, 0]

    asked by Taylor on June 5, 2011
  25. TRIGONOMETRY

    Can someone please give me a step by step answer on how to find the complex cube roots of 8(cos(4π/5)+isin(4π/5))? I need to know how to do this for my trig final next week.

    asked by Kate on May 17, 2013
  26. Algebra

    The perimeter of the rectangle is 112 units. Find the length of side PQ (bottom). . Write your answer without variables. SR (top): 4z-2 SP (side):3z+2

    asked by Anonymous on November 3, 2015
  27. Math

    A pond 100 ft in diameter is surrounded by a circular grass walk 2 feet wide. Find the are of the walk. Answer in terms of π. Please help me! TY

    asked by Kelly on May 6, 2011
  28. History

    Can someone please help me with this history question? I looked for the answer but couldn't find it in my lessons or through the internet... Question~ What is a modern day example of judicial review

    asked by Abby on October 20, 2015
  29. Physics

    A series circuit contains only a resistor and an inductor. The voltage V of the generator is fixed. If R = 10 Ω and L = 4.2 mH, find the frequency at which the current is one-half its value at zero frequency? Answer in Hz

    asked by Elizabeth on March 21, 2013
  30. Economics

    I have a question, and I can't find the answer in the book. Can someone help me? "The domestic demand for many Agricultural products is inelastic. How does this contribute to the price volatility of Ag products?"

    asked by Katie on December 3, 2007
  31. Physics

    Calculate the force of gravity on a spacecraft 19200 km (3 earth radii) above the Earth's surface if its mass is 1600 kg. I know that 1/16 of Fg is the answer but I can't seem to find out what the Fg is.

    asked by Elizabeth on October 28, 2010
  32. math

    if you threw a 6-sided die 48 times, about how many times would you expect to land on a number greater than or equal to 4? how do i find the answer?explain.

    asked by Celest on April 16, 2012
  33. Math

    Fiona earns $15 for each lawn she mows. What is the inequality to find out how many lawns she must mow to earn at least $135. My answer 15m

    asked by CC on January 14, 2015
  34. Physics

    Calculate the force of gravity on a spacecraft 19200 km (3 earth radii) above the Earth's surface if its mass is 1600 kg. I know that 1/16 of Fg is the answer but I can't seem to find out what the Fg is.

    asked by Elizabeth on October 28, 2010
  35. physics

    A physics professor lifts her 8.2-kg briefcase at constant speed with an upward force. Find the magnitude of her force. answer in newtons.

    asked by khan on February 21, 2011
  36. MATH

    A quiz consists of 90 multiple-choice questions, each with 4 possible answers (A, B, C and D). For someone who makes random guesses for all of the answers, find the probability of getting A as right answer.

    asked by ANUP on July 17, 2016
  37. tere

    what did i do wrong? i need to find lowest vapor pressure. a 0.13 m FeCl3 b 0.50 m sucrose c 0.24 m NaNO3 d 0.15 m Na2PO4 so i solved. a 4 x 0.13 = 0.52 b 1 x 0.50 = 0.50 c 5 x 0.24 = 1.2 d 7 x 0.15 = 1.05 i chose C but the answer is A. did i do something

    asked by chemistry on October 16, 2010
  38. CALC

    Find the volume of the solid obtained by revolving the region bounded by y=(19/3)x-(19/3)x^2 and the x-axis around the x-axis. Keep answer in terms of pi PLease explain each step

    asked by SARAH on June 29, 2016
  39. 11th grade

    An automobile with an initial speed of 4.56m/s accelerates uniformly at the rate of 2.4m/s2. Find the final speed of the car after 4.4 s. Answer in units of m/s.

    asked by Taylor on September 21, 2010
  40. Maths

    Thanks steve for a brilliant answer! Got one last one which is gobbledegook to me. Two functions f and g are defined by f:x(arrow)x^2 + 3 g:x(arrow)2x + 1 find: a) the function fg b)solve the equation f(x) = 12g^-1(x) Many Thanks!!!!

    asked by Saud on November 21, 2012
  41. algebra 1

    I need to find the slope of a line that is parallel to the x-axis, completely perpendicular. The answer choices are A. 0 B. 1 C. undefined D. infinity I'm thinking undefined?

    asked by sydney on December 3, 2017
  42. Math

    Suppose you are comparing two numbers that are greater than 1,000. You want to find the smaller of the numbers. How many pairs of digits might you have to compare before you have your answer? Explain.

    asked by Felix on September 5, 2013
  43. Math

    Find the probability of the following event: tossing a coin tails up or rolling a number less than 4 on a number cube. I got 1/2 + 3/6 and got 1. The answer is 3/4. I don't understand what to do. Please help.

    asked by Katie on April 18, 2016
  44. math

    Find the area of a sector of a circle if the central angle measures 90 and the radius measures 4 inches. Leave your answer in terms of .

    asked by rich on February 12, 2019
  45. Linear Inequality + graphing?

    don't quite understand how to go about finding the answer to this problem. I have to find two different points for a line, graph it, and also above or below the line to show the relationship. How do I go about doing this? The equation is: 3y-8x >24

    asked by Laura on March 21, 2011
  46. Chemistry

    I have a bag of m&m's with 52 in it and on the pkg it states it weighs 47.9g. If I divide by 52 it gives me .92g per m&m. To find out what the mass is of a mole of m&m's do I Multiply 6.02 x 10 to the 23 power x .92g for my answer?

    asked by Becky on November 9, 2007
  47. trig

    ABC is rightangled triangle. AD is the bisector of angle BAC. Angle DAC=15 degrees. X=CD. Find X. I know the answer is 7.1 but do not know how to do the actual sum. Can you please help AB = 23 CM

    asked by jane on May 5, 2011
  48. math

    When a single card is drawn from an ordinary 52-card deck, find the odds in favor of getting a red 10 or a black 6. I think the answer is 1:12. Is that correct?

    asked by KiKi on April 25, 2010
  49. Calculus

    Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. HINT [See Example 3.] Enclosed by y = x and y = x^4

    asked by Tiffany on December 15, 2013
  50. Calculus 1

    Find the critical numbers of the function. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) F(x) = x^4/5(x − 1)^2

    asked by TayB on October 21, 2015
  51. Math 3rd grade

    Suppose you are comparing two numbers that are greater than 100. You want to find the smaller of the numbers. How many pairs of digits might you have to compare before you have your answer? Explain

    asked by Patty on October 4, 2013
  52. Math ( Polynomial )

    If the polynomial, x^4 - 6x^3 + 16x^2 - 25x + 10 is divided by another polynomial x^2 - 2x + k, the remainder comes out to be x + a, find k + a, please work the complete solution instead of giving simply an answer.

    asked by Jack on April 13, 2013
  53. Physics

    Consider a force F = 815 N pulling 3 blocks of masses m1 = 7.94 kg, m2 = 15.3 kg, and m3 = 32.4 kg along a frictionless horizontal surface. Find the acceleration a of the blocks. Answer in units of m/s2.

    asked by Priscilla on October 9, 2012
  54. Algebra

    The perimeter of the rectangle below is 74 units. Find the length of side AB . Write your answer without variables. DC (top) 4z-1 CB (right side) 3z+3 AB (bottom) unknown

    asked by Caleb on December 8, 2015
  55. Calculus 1

    Find the critical numbers of the function. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) f(x) = x^(5)e^(-6x)

    asked by TayB on October 21, 2015
  56. Geometry

    Find the arc length, of a 130 degree arc, in a circle with a diameter of 7.2 inches. Round your answer to the nearest thousandth

    asked by Maria on May 20, 2012
  57. Calculus 1

    Find the critical numbers of the function. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) h(t) = t^(3/4) − 3t^(1/4)

    asked by TayB on October 21, 2015
  58. statistics

    Scores on a test have a mean of 66 and Q3 of 81. The scores have a distribution that is approximately normal. Find the standard deviation. Round your answer to the nearest tenth.

    asked by Abby on March 29, 2010
  59. statistics

    Can you step by srep dumb this down so that I can understand how to get the answer please? A set of 50 data values has a mean of 15 and a variance of 36. Find the standard score of a data value = 21

    asked by MissPatte on October 31, 2014
  60. geometry

    a piece of ribbon is x inches long. find the total length of 7 equal pieces of ribbon. express the answer in terms of x.

    asked by Anonymous on September 7, 2011
  61. physics

    Find the velocity in m/s of a dropped ball after 2.4 seconds in the air. Assume its initial velocity is zero. Round answer to one decimal place.

    asked by Samanthaa on September 13, 2011
  62. algebra

    Find the equation of a line that is parallel to the line y = −3x and contains the points (9,−4). Y=______ (Type your answer in slope-intercept form.) qaz

    asked by edward on February 4, 2016
  63. Physics

    A block is at rest on an inclined plane. The mass is 44 kg. µs = 0.54 Find the critical angle, θc, at which the block just begins to slide. Answer in units of ◦

    asked by Maya on December 7, 2014
  64. Math

    find the parralel of latitude along which a journey of 166km makes a change of 4 degree in longitude give answer to the nearest degree

    asked by flexy on October 19, 2012
  65. math

    Suppose you are comparing two numbers that are greater than 1,000. You want to find the smaller of the numbers. How many pairs of digits might you have to compare before you have your answer? Explain.

    asked by Anonymous on August 27, 2012
  66. math

    suppose you are comparing 2 numbers greater than 1000. you want to find the smaller of the numbers. how many pairs of digits might you have to compare before you have your answer? explain

    asked by mythreyee on August 30, 2012
  67. Calculus

    Hi, I need someone to double check my answer because it doesn't seem right to me. Find the centroid of the region bounded by y=0 and y = x^2 -2x. I calculated the area to be 4/3 and centroid (1, 0.4)... is that correct? Thanks in advance!

    asked by Monica on April 18, 2011
  68. Math

    The function defined below satisfies Rolle's Theorem on the given interval. Find the value of c in the interval (0,1) where f'(c)=0. f(x) = x3 - 2x2 + x, [0, 1] Round your answer to two decimal places.

    asked by Bri on November 1, 2016
  69. math please help

    Find the area of triangle ABC if AB = BC = 12 and

    asked by Gem on April 1, 2015
  70. Statistics

    A student takes true or false test consisting of 10 questions by just guessing at each answer. Find the probability that the student's score will be 80% or more?

    asked by Reid on May 9, 2017
  71. Algebra

    Scores on a test have a mean of 66 and Q3 is 80. The scores have a distribution that is approximately normal. Find the standard deviation. Round your answer to the nearest tenth. 10.5 18.7 20.9 9.4

    asked by Leozap on May 1, 2015
  72. math

    Use long division to find the quotient below. Enter your answer as a polynomial in descending order, using the caret ( ^ ) for exponents; for example, enter x2 as x^2.(x2 + 10x + 21) (x + 3)

    asked by Carrie on May 10, 2012
  73. calculus 2

    Consider the solid obtained by rotating the region bounded by the given curves about the line x = -3. y = x^2 , x = y^2 Find the volume V of this solid. I keep finding the wrong answer.

    asked by angel on February 16, 2010
  74. college algebra 2

    Use the equation W = -0.0014x2 - 0.076x + 50 to find W for each x-value in the table. Use this equation to estimate the number of worms on 60 and on day 180. Which answer is the most accurate?

    asked by Judith on December 11, 2011
  75. trigonometry

    the bases of a trapezoid are 22 and 12 respectively. The angles at the extremities of one base are 65 degree and 40 degree respectively find the two legs. Answer using law of sines pls

    asked by joe on February 10, 2012
  76. college algebra 2

    Use the equation W = -0.0014x2 - 0.076x + 50 to find W for each x-value in the table. Use this equation to estimate the number of worms on 60 and on day 180. Which answer is the most accurate?

    asked by Judith on December 11, 2011
  77. physical

    Find the magnitude of the resultant of the following two vectors: i) 50 units due east and ii) 100 units 30° north of west. the answer is 62 unit but how it come ?

    asked by meera on October 25, 2010
  78. physics

    Find the change in the gravitational force between two planets if the masses of both planets are doubled but the distance between them stays the same. Express your answer as an integer.

    asked by jim on March 8, 2012
  79. Math

    F(x) = -x^2 - x +2 graph function identify the vertex and axis of symmerty. Can some one explain the steps to get answer? I know I need to find the points on a graph just so confused

    asked by Sam on March 10, 2017
  80. business

    Would it be fair to pay U.S. employees that are relocated overseas a different wage than local employees? Can you please help me find resources in which I could answer this question fairly. thanks

    asked by Adam on January 17, 2010
  81. algebra

    Find the equation of a line that is perpendicular to the line y = 1/4x + 5 and contains the point (-6, 0) Y=________ (Type your answer in slope-intercept form.) qaz

    asked by edward on February 4, 2016
  82. math

    Find the surface area of the right rectangular prism. The height is 2 in, the length is 10 in, and the width is 4 in. I think the answer is 136. I made a formula, 2(8 + 20 + 40) and I got 136. Is this right?

    asked by keisha on November 12, 2007
  83. Algebra

    The diameter of the moon is 2155 miles. Find volume of the moon. Round answers to the nearest whole number and leave in the answer

    asked by Anonymous on June 1, 2012
  84. Math

    Find the area of a sector of a circle if the central angle measures 45° and the radius measures 12 inches. Leave your answer in terms of PI.

    asked by Willowmaker on January 17, 2019
  85. Science

    Science project: how does the type of liquid affect weathering. Where do I find info on this subject? I am not sure what questions to ask/answer to start this project

    asked by Lee on January 13, 2008
  86. Geometry

    A rectangular prism with 2 little square bases of a radius of 1m. It's height or rectangular length is 5m. Please help me find the surface area. The answer should be less than 50m².

    asked by Peter on June 1, 2011
  87. Physics

    An automobile with an initial speed of 6.12m/s accelerates uniformly at the rate of 4.4 m/s^2.Find the final speed of the car after 4.6 s. Answer in units of m/s

    asked by Roseanna on September 17, 2014
  88. Cal 1

    Use Newton's method with the specified initial approximation x1 to find x3, the third approximation to the root of the given equation. (Round your answer to four decimal places.) 1/3x^3 + 1/2x^2 + 1 = 0, x_1 = −3

    asked by Dee on March 7, 2013
  89. Calculus

    Find the critical numbers of the function. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) h(p) = (p − 2)/(p^2 + 9)

    asked by Kris on December 5, 2011
  90. math

    If you know the rate of a water leak in gallons per hour, how can you find the number of hours it takes for 1 gallon to leak out? Justify your answer. THANK YOU!

    asked by kimie on October 6, 2015
  91. math *functions*

    Find the first four terms of the sequence represented by the expression. n(n-1)-5 Pls just write down a step by step process of what to do, dont just give me the answer

    asked by halp meh on February 13, 2019
  92. Calculus

    The function defined below satisfies Rolle's Theorem on the given interval. Find the value of c in the interval (0,1) where f'(c)=0. f(x) = x3 - 2x2 + x, [0, 1] Round your answer to two decimal places.

    asked by olga on October 17, 2015
  93. Math

    I really need help with a quadratic question. So the problem is kx^2+[k+2]x-3=0 has roots which are real and positive. Find the possible values that k may have. The answer is -8+ √60

    asked by Barbra on September 17, 2016
  94. Calculus

    Solve : sec^2(x)= ã3*tanx + 1 on [0,radian-180 degrees) - couldn't find the symbol for radian on computer please try and explain how you got your answer best as yu can thanks so much :)

    asked by Jack on September 11, 2010
  95. Algebra

    Solve Find (f o g)(-6) when f(x)=4x+4 and g(x)=6x^2-3x-6. I originally came up with 918, but the answer is 916. Obviously I was close, but could someone tell how to get 916. I am studying for a test and am re-working my homework problems. Thanks.

    asked by Anonymous on March 29, 2008
  96. physics

    A proton moves at right angles to a magnetic field of 0.0609 T with a speed of 8.16×10 6 m/s. Find the magnitude of the acceleration of the proton. Answer in units of m/s 2

    asked by Anonymous on March 3, 2011
  97. Math

    Find the critical numbers of the function. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) f(x)=x^(4/5)(x − 6)^2

    asked by AH on November 10, 2012
  98. Math

    A lorry travels at 50 km/h. Given that the diameter of its wheel is 88 cm,find how many revolutions per minute the wheel is turning. GIve your answer to the nearest whole number.

    asked by Bushra on November 7, 2015
  99. Math

    I made a mistake when I simplified. Find and explain my mistake. Then complete the problem correctly. Simplify:(3m^7k^-5)^-3 Solution: 3^-3 m^4 k^-8 m^4/3^3k^8 Answer:m^4/27k^8

    asked by James on November 3, 2009
  100. Chemistry

    Please check my workings to see if i'm correct, thanks! Find the percentage of nitrogen by mass in Ammonium nitrate, NH4NO3. (28/80)x 100% = 35% Is my answer correct?

    asked by Marrion on October 20, 2009