Questions Asked on
June 13, 2013

  1. Precal

    An indoor physical fitness room consists of a rectangular region with a semicircle on each end. The perimeter of the room is to be a 200-meter running track. a) Draw a figure that visually represents the problem. Let x and y represent the length and width

    asked by Abi
  2. math

    The sales of a certain product after an initial release can be found by the equation where s represents the total number of units sold and t represents the time in weeks after release. How many weeks will pass before the product sells about 150 units?

    asked by eliza
  3. Statistics

    In a genetics experiment on peas, one sample of offspring contained 421 green peas and 166 yellow peas. Based on these results, estimate the probability of getting an offspring pea that is green. Is the result reasonably close to the value of 3/4 that was

    asked by Jana
  4. Calculus

    The demand function for the Luminar desk lamp is given by the following function where x is the quantity demanded in thousands and p is the unit price in dollars. p = f(x) = -0.1x2 - 0.3x + 39 (a) Find f '(x). f '(x) = (b) What is the rate of change of the

    asked by Mike
  5. Calculus

    Let f(x) = 4x5/4 + 10x3/2 + 9x. Find the following. (a) f '(0) = (b) f '(16) =

    asked by Mike
  6. bio

    You want to design a breathing machine that will bring 500 mL of air into the lungs. You begin with 100 mL of air at 2 atm of pressure. How would you change the pressure in your machine to accomplish your goal?

    asked by Anonymous
  7. Physics

    A ball is thrown horizontally at 20 m/s from the top of a cliff 50 meters high. How far from the base of the cliff does the ball strike the ground?

    asked by Harvey
  8. math

    10. A house painter can finish a house in 6 hours. His partner can finish the same house in 12 hours. Which of the following is the number of hours it would have taken them to finish painting the house if they had worked together? A. 3 hours B. 4 hours C.

    asked by major
  9. science

    A snail travels 45 cm in 20 min. Its average speed is Answer 2.25 cm/h. 15 cm/h. 90 cm/h. 135 cm/h.

    asked by Anonymous
  10. maths

    in a class there are 50 students,15 girls wear glasses 8 do not wear glasses.20 boys don't wear glasses.how many students wore glasses

    asked by aalia
  11. Statistics

    The probability of a randomly selected car crashing during a year in a certain country is .0479. If a family has three cars, find the probability that at least one of them has a car crash during a year.

    asked by Jana
  12. space

    Consider a situation where immediately after birth, twins are separated. One continues to live on earth, while the other is whisked away in a space ship at 90% of the speed of light. After 65 years they are reunited. Will they look the same? Show proof of

    asked by Anonymous
  13. math

    The polar coordinates of a point P are (2,240 degrees). The Cartesian (rectangular) coordinates of P are

    asked by Anonymous
  14. English

    1. To get the place, go out of the school gate. Turn left. Then go straight for 300 meters. It is on your right between City Bank and the bakery. 2. To get the place, go out of the school gate. Turn left. Then go straight for 5 minmutes. It is on your

    asked by rfvv
  15. Calculus

    The volume of a spherical cancerous tumor is given by the following equation. V(r) = (4/3)pi r^3 If the radius of a tumor is estimated at 1.4 cm, with a maximum error in measurement of 0.003 cm, determine the error that might occur when the volume of the

    asked by Ant
  16. College Physics

    A 57.0 cheerleader uses an oil-filled hydraulic lift to hold four 110 football players at a height of 1.40 . If her piston is 19.0 in diameter, what is the diameter of the football players' piston? The density of the oil in the hydraulic system is 900

    asked by Isabel
  17. Calculus

    A car leaves an intersection traveling west. Its position 5 sec later is 22 ft from the intersection. At the same time, another car leaves the same intersection heading north so that its position 5 sec later is 27 ft from the intersection. If the speed of

    asked by Mike
  18. math

    there are 40 pupils in a class. each girl is given 5 books and each boy is given 4 books.the girls have 65 more books than the boys. how many more girls than boys are there in the class?

    asked by kyla
  19. Calculus

    The relationship between the amount of money x that Cannon Precision Instruments spends on advertising and the company's total sales S(x) is given by the following function where x is measured in thousands of dollars. S(x) = -0.002x3 + 0.9x2 + 4x + 500 (0

    asked by Mike
  20. math

    Jeremy surveyed students at his school for his math project. When he analyzed the results, 38 students, or 18% of those surveyed, selected hamburgers as their favorite food. How many poeple did Jeremy survey for his math project? (Round your answer to the

    asked by nicole
  21. Physics

    If the odometer on the car reads 25.0 km at the beginning of a trip and 65.0 km a half hour later, what is the average speed of the car? (Remember significant digits.)

    asked by Isis
  22. Calculus

    Let f be the function defined as follows. $ y = f(x) = {\color{red}5} x^2 -{\color{red}9} x +{\color{red}10} $ (a) Find the differential of f. dy = (b) Use your result from part (a) to find the approximate change in y if x changes from 2 to 1.97. (Round

    asked by Ant
  23. Maaaath

    a stone thrown upward from the top of a 320-foot cliff at 128 ft/sec eventually falls to the beach below? how long does the stone take to reach its highest point?

    asked by Rachel
  24. Science

    Calculate the linear momentum of a pickup truck that has a mass of 1100 kg and is traveling eastward at 22 m/s.

    asked by Audible
  25. math

    14. The top of a dresser is 33/ 4 feet from an 8-foot ceiling. Which of the following is the height of the dresser in feet? A. 41/4 B. 43/4 C. 5,/4 D. 53/4 15. A company that made $2.4 million in profits the previous year is on pace to make $3 million in

    asked by major
  26. Precal

    An indoor physical fitness room consists of a rectangular region with a semicircle on each end. The perimeter of the room is to be a 200-meter running track. a) Draw a figure that visually represents the problem. Let x and y represent the length and width

    asked by Abi
  27. Physics

    While traveling south on an expressway, a car traveling 60 mph (miles per hour) slows down to 30 mph in 12 minutes due to traffic conditions. Calculate the acceleration.

    asked by Isis
  28. Geometry

    In a certain game, a player throws a standard 6-sided number cube twice per turn. What is the probability that the result of the first throw will be a 1, and the result of the second throw will be greater than 3?

    asked by DaMarkus
  29. Physics

    A rocket blasts off. In 10.0 seconds it is at 10,000 ft, traveling at 3600 mph. Assuming the direction is up, calculate the acceleration.

    asked by Isis
  30. Science

    The Asteroid433Eros has a mass of 7.2 x 1015 kg, and a radius of = 11 km.  What is the escape velocity of this asteroid (remember to use r in meters)?  What consequence would this have for someone trying to walk on this asteroid?

    asked by Mia
  31. Physics

    What is the smallest radius of an unbanked (flat) track around which a motorcyclist can travel if her speed is 25 km/h and the coefficient of static friction between the tires and road is 0.28?

    asked by Holly
  32. Calculus

    The total worldwide box-office receipts for a long-running movie are approximated by the following function where T(x) is measured in millions of dollars and x is the number of years since the movie's release. T(x) = (120x^2)/(x^2 + 4) How fast are the

    asked by Mike
  33. math check

    Suppose that you are in a class of 31 students and it is assumed that approximately 13% of the population is left-handed. (Give your answers correct to three decimal places.) (a) Compute the probability that exactly five students are left-handed.

    asked by Tom56
  34. Math help

    The International Bottled Water Association says that Americans on the average drink 4.6 (8-oz.) servings of water a day. Assume that the number of 8-oz. servings of water is approximately normally distributed with a standard deviation of 1.4 servings.

    asked by Sue 620
  35. Physics

    City B is northwest of City A, and the 400 mile trip by car takes 8 hours. The cities are 320 miles apart if able to travel in a straight line. What is the speed of a trip from City A to City B?

    asked by Isis
  36. Calculus

    Follow the steps below for the given function. (Do not use mixed numbers in your answers.) 2x + 5y = 1 Solve the equation for y. y = Differentiate this equation with respect to x. y ' = Complete the steps below to implicitly take the derivative of the

    asked by Ant
  37. physical science

    David builds a wood raft that weighs 100lbs (445 N). The bottom area of the raft is 4 meters and by 3 meters and the raft is 0.6 meters thick. When the raft is floats in water, what must the height of the water line be on the raft?

    asked by chibi
  38. English

    1. The dog is black and white. 2. There are two black and white dogs in the kennel. 3. There are two black-and- white dogs in the kennel. (Are they all grammatical?) 4. The food is a littel too spicy but delicious. 5. The food is a little spicy and

    asked by rfvv
  39. math

    The cost lunch is $29.40, and Maya $33.81 in all. What percent was the tip that Maya left?

    asked by Johanna
  40. Physics

    An object is dropped from a platform 100 feet high. Ignoring wind resistance, what will its speed be when it reaches the ground?

    asked by Isis
  41. organic chem

    If carbon =62.07%,hydrogen=10.34%, and oxygen=27.59%. Determine its empirical formula, name each of them. Do not consider ones > 6-carbons.

    asked by Lorenzo
  42. maths

    A polynomial f(x)satisfies the equation f(x)+(x+1)^3=2f(x+1) Find f (10)

    asked by ayush
  43. math

    Dennis bought a book for $12.95, and his total bill was $13.92. What was the sales tax that was applied to his purchase? What I got was 7.5% but I wanted to make sure it was correct.

    asked by Michael
  44. math

    A rectangle has a perimeter of 24 units. If the width is 4 units, which of the following is the length? A. 6 units B. 8 units C. 10 units D. 16 units

    asked by major
  45. reading

    30-day Money Back Guarantee Our Groom Co. electric shavers come with a 30-day money back guarantee because we are focused on ensuring your satisfaction. The only stipulation is that you use your new shaver exclusively for 2 weeks to become accustomed with

    asked by era22
  46. Calculus

    Suppose f and g are functions that are differentiable at x = 1 and that f(1) = 2, f '(1) = -1, g(1) = -2, and g '(1) = 3. Find the value of h '(1). h(x) = (x2 + 11) g(x) h '(1) =

    asked by Mike
  47. Calculus

    Let f be the function defined as follows. $ y = f(x) = \sqrt{{\color{red}3} x +{\color{red}10}}$ (a) Find the differential of f. dy = (b) Use your result from part (a) to find the approximate change in y if x changes from 4 to 4.1 (Round your answer to

    asked by Ant
  48. math

    20. A tire company manufactures 50 tires an hour with its current staff. The company can make 10 extra tires per hour for every extra worker it hires. Which of the following equations represents this relationship mathematically, with x being the number of

    asked by major
  49. science

    how many molecules of oxygen are produced from the balanced equation 2kclo3=2kcl+3o2

    asked by Alexis
  50. Computer Science

    write a program that will prompt the user for a value and print the value entered to the screen. The program stops when the user enters a value less than zero. I need an IPO chart, pseudocode and C++

    asked by Laurel
  51. physics

    What is the net force on a cart that is pulled to the right with 120 pounds and to the left with 30 pounds?

    asked by michellle
  52. physics

    The most convenient way to express vectors in the two dimensional plane is in the familiar (x,y) Cartesian coordinates. However, one can express vectors in other coordinate systems as well. For example, another useful coordinate system for the plane is

    asked by raja harishchandra
  53. ratio

    The ratio of cats to dogs is 6:4. What percentage of the animals at the shelter are cats.

    asked by Celest
  54. Chemistry

    How would you be able to recognise that C5H8 was an alkyne? And how would you know that CH3COCH3 was a ketone? (I thought it was an ether)

    asked by a Canadian
  55. Physics

    Light of intensity 2 Wm^–2 is traveling through air (n = 1.0) is normally incident on a dielectric surface. If the intensity of the reflected light is 0.3 W m^–2 what is the refractive index of the dielectric material?

    asked by Anna
  56. Math Help

    Consider the approximately normal population of heights of male college students with mean ì = 69 inches and standard deviation of ó = 4.6 inches. A random sample of 25 heights is obtained. (c) Find the standard error of this sampling distribution. (Give

    asked by Tom7
  57. Physics

    A car travels 30 km north in 25 min. and 40 km east in 35 min. What is the total distance traveled?

    asked by Isis
  58. math

    3. One hundred twenty-five tickets have been sold for an event at a local theater. If this represents 25% of the capacity for the theater, which of the following is the capacity? A. 156 B. 375 C. 410 D. 500

    asked by major
  59. Math check

    A population has a standard deviation ó of 28 units. (Give your answers correct to two decimal places.) (a) Find the standard error for the mean if n = 10. SD/Sqrt of N = 28/10^=.28

    asked by Sue 71
  60. Science

    Compared with the strength of Earth's gravity at its surface, how much weaker is gravity at a distance of 10 Earth radii from Earth's center? At 20 Earth radii?

    asked by Mia
  61. Calculus

    Find an equation for the tangent line of the function f(x)=6+10xe^x at the point (0,6).

    asked by Robin
  62. Physics

    When u type on a computer keyboard, do u do work on the computer keys? Pleasee explain

    asked by Katherine :))
  63. math

    Inches 9 8 - 7 - 6 - 5 - ,--- 4 - t-- ,--- 3 - t-- ,--- ~ t-- 2 1 - - J F M A M J J A s 0 N D Months The graph above represents the amount of rainfall in a particular state by month. Which of the following is the total rainfall for the first 3 months of

    asked by major
  64. math

    Write a question to match this answer: 6 boxes of 12

    asked by Anonymous
  65. Calculus

    Find the points on the graph of f where the tangent line is horizontal. f(x) = x3 - 15x2 (x, y) = ( , ) (smaller x-value) (x, y) = ( , ) (larger x-value)

    asked by Mike
  66. physics

    The most convenient way to express vectors in the two dimensional plane is in the familiar (x,y) Cartesian coordinates. However, one can express vectors in other coordinate systems as well. For example, another useful coordinate system for the plane is

    asked by Anonymous
  67. math

    a number rounds off to 4000. the digit in the hundreds place is twice the digit in the tens place. the sum of the digits is 12. find the number uses only two different digits. find the number.

    asked by Anonymous
  68. math

    a number rounds off to 4000. the digit in the hundreds place is twice the digit in the tens place. the sum of the digits is 12. find the number uses only two different digits. find the number.

    asked by Anonymous
  69. The defects of ball mill

    The Ball Mill faults: (1) work efficiency is low, the power consumption unit. (2) the ball mill barrel rotational speed is low (about 15 ~ 27 r/min), if you use ordinary motor that. The average all need equipped with expensive reducer. (3) grinding medium

    asked by selina
  70. Direct way to improve yield of ball mill

    The Ball Mill as a general grinding equipment, is widely used in dressing, building materials and chemical industry, ball mill can be divided into dry and wet type two kinds of grinding way. According to the row of ore in different ways, and can be divided

    asked by selina
  71. Calculus

    The equation of motion of a particle is s=4t^3−7t, where s is in meters and t is in seconds. Find a) the velocity of the particle as a function of t : v(t)= b) the acceleration of the particle as a function of t : a(t)= c) the velocity after 5 seconds d)

    asked by Patrick
  72. social science

    how is biology related to tourism?

    asked by edgar urquiola
  73. mah

    Find f(a), f(a + h), and the difference quotient f(a + h) − f(a) ------------------ h , where h ≠ 0. f(x) = 6x + 7 f(a)= f(a + h) = f(a + h) − f(a) ----------------- = h

    asked by michelle
  74. MAth

    Find f(a), f(a + h), and the difference quotient f(a + h) − f(a) ------------------ h , where h ≠ 0. f(x) = 2/x+5 f(a)= f(a + h) = f(a + h) − f(a) ----------------- = h

    asked by michelle
  75. Boolean Algebra

    In the country of Genovia, the president wants to ensure that the Monetary Committee can activate a device that opens the country’s safe. The safe system is to be activated by a device that obeys the following rules: Each member of the Monetary Committee

    asked by Hy'Lee
  76. reading

    43. Student Council Election Day: Monday To: Nominees From: Your Principal Concerning: Rules of Election 1. Everyone running for office must prepare a 3-minute speech that will be recorded for presentation to the entire school. You need to "Dress for

    asked by major
  77. reading

    46. Choosing the Resolution for Your Photos Resolution Purpose L (Large) Print larger than A4 size prints 2592 x 1944 pixels (8 .3 x 11 .7 in.) Print larger than letter size prints (8 .5 x 11 in.) M1 (Medium 1) Print up to A4 size prints 2048 x 1536 pixels

    asked by major
  78. Math check

    Consider a normal population with ì = 49 and ó = 6. Calculate the z-score for an x of 44.2 from a sample of size 22. (Give your answer correct to two decimal places.) 44.2-49/6/22^=.00165=.00

    asked by Sue 74
  79. Math check

    Consider the following. (Give your answers correct to two decimal places.) (a) Determine the value of the confidence coefficient z(á/2) for 1 - á = 0.87. =.44 my answer . (b) Determine the value of the confidence coefficient z(á/2) for 1 - á = 0.91.

    asked by Sue 8
  80. physics

    The most convenient way to express vectors in the two dimensional plane is in the familiar (x,y) Cartesian coordinates. However, one can express vectors in other coordinate systems as well. For example, another useful coordinate system for the plane is

    asked by raja harishchandra
  81. math

    A fair coin is flipped 3 times. The probability of getting exactly two heads, given that at least one flip results in a head, can be written as a/b, where a and b are coprime positive integers. What is the value of a+b?

    asked by raja harishchandra
  82. physics

    If you watch little kids try to open doors, they will often just push anywhere on the door, rather than on the edge like adults do. This is because they don't understand that it's easier to open a door if you push on the edge. But how much easier? Consider

    asked by raja harishchandra
  83. maths

    A 20 foot ladder is leaning against a building.if the ratio of the base of ladder's distance from the building to its top's height from the ground is 3:4,find how high the top of the ladder is from the ground.

    asked by cedric mitz
  84. Science

    Rhizopus is a Fugus that causes mouldy bread. Identify the functions of the main features in Rhizopus,when observing it under a microscope.

    asked by Tiaamiiah
  85. science

    The most convenient way to express vectors in the two dimensional plane is in the familiar (x,y) Cartesian coordinates. However, one can express vectors in other coordinate systems as well. For example, another useful coordinate system for the plane is

    asked by Abhishek
  86. math

    Find f(a), f(a + h), and the difference quotient f(a + h) − f(a) ------------------ h , where h ≠ 0. f(x) = x^2+7 f(a)= f(a + h) = f(a + h) − f(a) ----------------- = h

    asked by michelle
  87. physics

    give as many characteristics as you can of a bicycle pump

    asked by Tanaka Mufuvi
  88. physics

    give as many characteristics as you can of a bicycle pump

    asked by Tanaka Mufuvi
  89. physics

    give as many characteristics as you can of a bicycle pump

    asked by Tanaka Mufuvi
  90. math

    Jphn just purchased a plasma t.v. for his living room. He paid $12,00 for a 46-inch television. The regular price of the television was $1,500. What percentage did John save during the sale? I got 20% but I wanted to see if I was right or not.

    asked by bella
  91. ratio

    the ratio of boys to girls at Shadetree Park is 1:3. draw a picture of the children in the park if there are 3 boys. How many boys and girls do I draw?

    asked by Celest
  92. Calculus

    Find the slope and the equation of the tangent line to the graph of the function f at the specified point. f(x) = -8/5 x^2 + 7 x + 7;(-1, -8/5) slope tangent line y =

    asked by Mike
  93. geometry

    If RS=ST=19, s

    asked by savannah
  94. Calculus

    Find an equation of the tangent line to the graph of the function f defined by the following equation at the indicated point. (x - y - 1)3 = x; (1, -1) y =

    asked by Ant
  95. Science

    What is the circular velocity of an Earth satellite 1000. km above Earth's surface? (Note: Earth's average radius is 6371 km.)

    asked by Mia
  96. Physics

    Two fixed, non-conductive, isolated rings of radii 25 cm are electrified and brought close to each other so that they are parallel. The distance between them is 1 m. You know that one of them has a charge of 1 nC(Nano Coulomb) evenly distributed on it, but

    asked by Physics Lover
  97. math

    Consider a 25×25 grid of city streets. Let S be the points of intersection of the streets, and let P be the set of paths from the bottom left corner to the top right corner of which consist of only walking to the right and up. A point s is chosen

    asked by raja harishchandra
  98. Math

    what is the value of pie?

    asked by Jnr John
  99. Calculus

    Given that f(x)=x^8h(x) h(−1)=5 hŒ(−1)=8 Calculate fŒ(−1).

    asked by Lauren
  100. math

    find the polynomial whose zeroes are -5 and -4.

    asked by shiana
  101. GEOMETRY BETWEENNESS URGENT !!

    POINTS H, I , AND J ARE THREE POINTS ON A LINE WITH COORDINATES -4/5, -1/SQRT5 AND -1/10. WHICH POINT IS BETWEEN THE OTHER TWO ?

    asked by Jeyna
  102. Science

    Calculate the average size of the microbes in Saccharomyces ? show your working out.

    asked by Tiaamiiah
  103. Science

    what are the four steps need to ascertain whether a fungus was the causes of the disease.

    asked by Tiaamiiah
  104. science

    Does the study by Frenda et al. (2013) prove that our memories are easily manipulated and should therefore not be trusted? Article: False Memories of Fabricated Politicians

    asked by jojokhar
  105. Math

    Find f(a), f(a + h), and the difference quotient f(a + h) − f(a) ------------------ h , where h ≠ 0. f(x) = 17 f(a)= f(a + h) = f(a + h) − f(a) ----------------- = h

    asked by michelle
  106. Math

    Find f(a), f(a + h), and the difference quotient f(a + h) − f(a) ------------------ h , where h ≠ 0. f(x) = 4 − 6x + 7x2 f(a)= f(a + h) = f(a + h) − f(a) ----------------- = h

    asked by michelle
  107. Math

    Find f(a), f(a + h), and the difference quotient f(a + h) − f(a) ------------------ h , where h ≠ 0. f(x) = 7x^3 f(a)= f(a + h) = f(a + h) − f(a) ----------------- = h

    asked by michelle
  108. physics

    give as many characteristics as you can of a bicycle pump

    asked by Tanaka Mufuvi
  109. French

    Is this sentence correct? Or did I conjugate it wrong? :Je vais au cinéma hier.

    asked by Gracie
  110. science

    what could not be part of a tree canopy? a. moss b. roots c. leaves d. branches

    asked by Celest
  111. Math (Algebra)

    if i have 3 algebra tiles(big size)and 2 regular size negative tiles what would the expression be?

    asked by cake
  112. physics

    If you watch little kids try to open doors, they will often just push anywhere on the door, rather than on the edge like adults do. This is because they don't understand that it's easier to open a door if you push on the edge. But how much easier? Consider

    asked by raja harishchandra
  113. math

    Consider a 25×25 grid of city streets. Let S be the points of intersection of the streets, and let P be the set of paths from the bottom left corner to the top right corner of which consist of only walking to the right and up. A point s is chosen

    asked by raja harishchandra
  114. Science

    Saccharomyces Cerevisiae is a fungi, it is used in the production of bread. Rhizopus is a fungus that causes mouldy bread. What is the difference between the structure of the fungi, when looking at Saccharomyces and Rhizopus under a microscope?

    asked by Tiaamiiah
  115. Math

    Evaluate the piecewise defined function at the indicated values. f(x) = x^2 if x < 0 x + 9 if x ≥ 0 f(−3) = f(−2) = f(0) = f(2) = f(3) =

    asked by aramik
  116. Math

    Evaluate the piecewise defined function at the indicated values. f(x) = x2 + 6x if x ≤ −1 x if −1 < x ≤ 1 −1 if x > 1 f(−2) = f(-3/2) = f(−1) = f(0) = f(35) =

    asked by aramik
  117. math

    Find f(a), f(a + h), and the difference quotient f(a + h) − f(a) ------------------ h , where h ≠ 0. f(x) = x/x+6 f(a)= f(a + h) = f(a + h) − f(a) ----------------- = h

    asked by michelle
  118. math

    Find f(a), f(a + h), and the difference quotient f(a + h) − f(a) ------------------ h , where h ≠ 0. f(x) = 2x/x-7 f(a)= f(a + h) = f(a + h) − f(a) ----------------- = h

    asked by michelle
  119. Math help

    A sample of 30 of 178 funded projects revealed that 12 were valued at $17,360 each and 18 were valued at $20,280 each. From the sample data, estimate the total value of the funding for all the projects. (Enter your answers to two decimal places.) $

    asked by Sue 8
  120. English30

    According to gallien, why do people come to Alaska? Novel into the wild plz help

    asked by Kau