1. physics

    Find the resultant force of a 32-N force pulling horizontally on a wooden crate and a 20-N force pulling at an angle of 49 degrees upward of horizontal. (Your answer should include magnitude and direction of the force)

    asked by Jade on December 4, 2009
  2. 8TH GRADE MATH EXPRESSIONS

    A catering business charges $50 for setting p a meal and $150 for enough food for 12 people. You will be using the caterer for an upcoming celebration. There will be 32 people at the party. Find the total cost to use the caterer for the party.

    asked by CAMERON on August 23, 2012
  3. College Algebra

    Find a linear equation in the form P = mt + b (y = mx + b), which gives the population, p, t years from 2010. This scenerio is based on a population of 6,000 in the year 2010, and increases by 200ppl every year. Please show the work too

    asked by Carmine on November 30, 2008
  4. math

    I have to make a checker board 40cm by 40cm and it has to have 8 even squares in each row. Is the 40 cm 15 3/4 inches? and how do you measure each square to be equal? You'll need a ruler with centimeters. Then divide 40 by 8 to find the size (in

    asked by jared on April 1, 2007
  5. physics

    A bridge is supported at both ends (500m between supports). A Car (250 Kg) is at 100m from the left support. A truck (4000 Kg) is at 200m from the left support. Find the forces on the supports

    asked by Mark on March 28, 2013
  6. algebra

    The radius needed to create a sphere with a given volume V can be approximated by the equation r = 0.62(V)1/3. Find the radius of a sphere with a volume of 216 cubic meters. Round the answer to the nearest hundredth.

    asked by Anonymous on July 7, 2013
  7. physics

    If an object is initially moving with a constant velocity of 20m/s towards positive x-axis and after 5 sec it changes its direction and moving at an angle of 30o with x-axis, find magnitude and direction of its acceleration.

    asked by Anonymous on October 26, 2014
  8. Math

    The profit (in millions of dollars) from the sale of x million units of Blue Glue is given by p= .7x-25.5. The cost is given by c= .9x +25.5 (a) Find the revenue equation. (b) What is the revenue from selling 10 million units? (c)What is the break-even

    asked by Brooke on April 9, 2013
  9. Math

    Evaluate log(6)√6 (actual question) There's a problem in my book that says: Convert each logarithm to a natural logarithm and evaluate log(5)√288 the answer in the back is 1.7593 but I can't find an example of those kinds.

    asked by Jon on April 22, 2009
  10. Calculus

    Given the equation xy = 2, set up an integral to find the length of path from x = a to x = b and enter the integrand below. I did the integral from b to a and set it equal to the sqrt(1+4/x^4), because I found y to equal 2/x and the derivative to be

    asked by Katelyn on March 13, 2009
  11. Physics

    How can you find the velocity of a bullet fired from a nerf gun the second it leaves the gun, if all you have is the angle it was shot at, and how far it traveled? (All in degrees) 0 degrees=2.54m 10=6.24m 30=6.54m 45=6.58m 60=1.6m 80=.94m

    asked by Tiana on September 26, 2013
  12. physics

    An object is projected vertically upwards. It’s height hm at time t seconds is given by h=20t-3/2t^2 - 2/3t^3, find: a) the time at which it is momentarily at rest b) correct to 2dp, the maximum height reached by the object?

    asked by poppy👌🤔 on May 12, 2019
  13. linear programming

    Maximize z = 16x + 8y subject to: 2x + y ≤ 30 x + 2y ≤ 24 x ≥ 0 y ≥ 0 Graph the feasibility region. Identify all applicable corner points of the feasibility region. Find the point(s) (x,y) that maximizes the objective function z = 16x + 8y.

    asked by nmh on July 8, 2011
  14. Related Rates

    A particle moves along a path described by y=x^2. At what point along the curve are x and y changing at the same rate? Find this rate if at time t we have x=sin t and y= sin^2t. I solved the first part and got (1/2, 1/4), but I have no idea how to tackle

    asked by Shania on May 6, 2013
  15. Math

    The graph of a quadratic function has vertex(3,-4) and passes through the point (4,1). Find the equation of the function in standard form. Rewrite the equation in general form. Could someone explain to me how to do this, just don't understand.

    asked by -Untamed- on December 5, 2011
  16. statistics

    A lottery offers one $900 prize, one $600 prize, three $400 prizes, and five $100 prizes. One thousand tickets are sold at $6 each. Find the expectation of a person buys five tickets.

    asked by Bruno on June 5, 2012
  17. Probability Help ASAP!

    Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 17 5 2 24 Female 7 11 12 30 Total 24 16 14 54 If one student was chosen at random, find the probability that the student was female.

    asked by Amanda on October 1, 2016
  18. dynamics

    Find the mass center of a cylinder with height L and a hemisphere glued to the top with radius R. L=2R. The cylinder is standing up on its bottom end with hemisphere on top. Im so lost on this and cant use the formula to work.

    asked by spencer on February 8, 2009
  19. physics

    a black ball of mass 2kg moving at velocity 10m/s collide with a stationary white ball of mass 3kg.find their common velocity if they stick together after collision?

    asked by javeria on March 27, 2019
  20. Maths please help

    (a) Find the points which divide the line joining A(1,3) and B(-4,-1) internally in the ratios: (i) 1:2 (ii) 1:1 (iii) 3:1 (b) On the same x-y axes plot the point A(1,3) and B(-4,-1) and draw the line joining them. Add the three points which you calculated

    asked by Jordan on November 1, 2016
  21. Math

    Find the values of the six trigonometric functions of θ. (If an answer is undefined, enter UNDEFINED.) Function Value: csc(θ) = 4 Constraint: cot(θ) < 0 1) sin(θ)= 2) cos(θ)= 3) tan(θ)= 4) csc(θ)= 5) sec(θ)= 6) cot(θ)=

    asked by Hi😱 on February 21, 2019
  22. Probability/Math

    Find the probability that a randomly thrown dart will land in the shaded area of the dartboard. A square that is 6ft width by 6ft length 4ft width by 9ft length.

    asked by Addy on March 16, 2010
  23. geometry

    the lateral area of two similar solids are 16pie cmsquared and 9pie cmsquared. The volume of the larger solid is 128pie cm cubed. find the volume of the smaller solid please explain

    asked by why on November 6, 2013
  24. Finite Math

    The amount desired in a sinking fund is given. Find the periodic payments required to obtain the desired amount. A = $75,000, the interest rate is 7.2%, and payments are made quarterly for 4 years.

    asked by Matt on February 18, 2013
  25. math

    A cow is tied with a rope of length 14 m at the corner of rectangular field measured 20 m by 16 m. Find the area of the field in which the cow can graze. #anyone to help me with proper and systematic step by step solution

    asked by kelvin on April 19, 2017
  26. Math

    Find the unit rate. Enter your answer as a mixed number. A fertilizer covers 5/6 square foot in 1/2 hours. The unit rate is ____ square feet per hour.

    asked by asiah on October 6, 2016
  27. math

    suppose you copy a figure on the copier using the givin size factor. Find the scale factor from the orignal figure to copy in desimal form. for 200%, 150% 75% 50% 125% and 25%

    asked by ashtyn on November 26, 2009
  28. physics

    Three moles of an ideal gas are compressed from 5.5*10^-2 to 2.5*10^-2 m^3. During the compression, 6.1*10^3J of work is done on the gas, and heat is removed to keep the temperature of the gas constant at all times. Find the temperature of the gas. Can

    asked by Stella on March 2, 2008
  29. MATH HELP ASAP

    Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 18 16 8 42 Female 7 17 9 33 Total 25 33 17 75 If one student is chosen at random, Find the probability that the student was NOT a female that got a "A"

    asked by Amanda on October 1, 2016
  30. calculus

    A force of 13 N is needed to keep a spring with a 2-kg mass stretched 0.25 m beyond its natural length. The damping constant of the spring is c = 8. If the mass starts at the equilibrium position with a velocity of 0.5 m/s, find its position at time t.

    asked by nicholas on July 16, 2012
  31. Math

    The perimeter of a rectangle is 42ft. The length is 7ft. longer than the width. Find the dimensions. Write a system of linear equations and solve the resulting system. Let X be the length, and Y be the width.

    asked by Denise on August 5, 2013
  32. calculus

    for the point with cartesioan coordiantes (5,-2) find polar coordinated such that r>0. express it in radians. so far i got the answer to be -.38805...is dat the answer or should i add 2pie or 360 to get r>0? Add 2PI but it says to radians?

    asked by amy on April 17, 2007
  33. PHYSICS

    Three moles of an ideal gas are compressed from 5.5*10^-2 to 2.5*10^-2 m^3. During the compression, 6.1*10^3J of work is done on the gas, and heat is removed to keep the temperature of the gas constant at all times. Find the temperature of the gas. Can

    asked by sTELLA on March 2, 2008
  34. Math

    A Norman window has the shape of a rectangle surmounted by a semicircle. (Thus the diameter of the semicircle is equal to the width of the rectangle.) If the perimeter of the window is 24 ft, find the value of x so that the greatest possible amount of

    asked by Ashleigh on November 14, 2011
  35. Math(analytic geometry)

    I'm studying analytic geometry and i came accross this question;"find the tangents common to x²+ y²=8 and y²=16x.How am i going to work it out,please? I tried to work out their gradients which gave me x²+y²=8 2x+2ydy/dx=0 dy/dx=-2x/2y =-x/y y²=16

    asked by Shyla on December 4, 2015
  36. maths

    (a) Find the points which divide the line joining A(1,3) and B(-4,-1) internally in the ratios: (i) 1:2 (ii) 1:1 (iii) 3:1 (b) On the same x-y axes plot the point A(1,3) and B(-4,-1) and draw the line joining them. Add the three points which you calculated

    asked by Steven on November 1, 2016
  37. Algebra

    A boat has a speed of 20 mph in still water. While traveling on a river at top speed, it went 40 miles upstream in the same amount of time it went 60 miles downstream. Find the rate of the river current.

    asked by Rob on January 31, 2016
  38. Calculus

    Find the volume of the solid obtained by rotating the region bounded by y=x^3, y=1, and the y-axis around the x-axis. What I did was: V=ç(0,1)pi(1-x^3)^2 dx v=pi(x^7/7-x^4/2+x) and I evaluated it for one since 0 is just going to be 0. and I got 9pi/14

    asked by Jessica on October 13, 2011
  39. college chem

    In the reaction PCl5(g) ---> PCl3(g) + Cl2 (g) 0.200 mol of PCl5 is introduced into a 2.00 liter vessel. At equilibrium, the concentration of Cl2 is found to be 0.0500 molar. Find Kc for the reaction.

    asked by josh on March 7, 2010
  40. ALGEBRA

    Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 60 people. (a) How many would you expect to be between 159 and 171 cm tall? (b) How many would you expect to

    asked by Urgen please help on June 10, 2012
  41. Physics

    A cute puppy walks 20 m at 30 degrees north of east and then continues another 45 m at 15 degrees south of east. Find the magnitude of the puppy's net displacement (or the distance from the starting point)

    asked by Mary on October 6, 2016
  42. Maths

    An aeroplane flies due north for 200 km and then turns due east and flies for a further distance of 325km. Find the bearing,to the nearest degree,of the aeroplane from its starting point.

    asked by Shane on April 5, 2013
  43. MATH

    Suppose that people's heights (in centimeters) are normally distributed, with a mean of 175 and a standard deviation of 6. We find the heights of 80 people. (a) How many would you expect to be between 168 and 182 cm tall? (b) How many would you expect to

    asked by Lee Ann on August 24, 2011
  44. Calculus

    Find the volume of the solid obtained by rotating the region bounded by y=x^3, y=1, and the y-axis around the x-axis. What I did was: V=ç(0,1)pi(1-x^3)^2 dx v=pi(x^7/7-x^4/2+x) and I evaluated it for one since 0 is just going to be 0. and I got 9pi/14

    asked by Jessica on October 13, 2011
  45. Physics help 2

    I've asked the question "what is the fundamental equation to find the speed of a rocket." That's what I am having problems with because there are more than one. How do I know which one is the preferred equation used? The preferred equation is the one that

    asked by tracey on November 7, 2006
  46. math

    A vehicle leaves a skid mark of 40 ft before stopping. What has the approximate speed of the vehicle before it stopped? (the formula is speed=.7 times length, then find the square root times 5.5) Is is 25-35 mph?

    asked by Summer on October 26, 2010
  47. math

    Suppose that people's heights (in centimeters) are normally distributed, with a mean of 175 and a standard deviation of 6. We find the heights of 40 people. (a) How many would you expect to be between 169 and 181 cm tall? 1 (b) How many would you expect to

    asked by apryl on August 24, 2011
  48. chemisty

    I have data for titration of a strong base against a strong acid when I added volumes of NaOH 1 mL at a time to 50.00 mL of HCl to see the change in pH. One of the questions says to find the molarity of the HCl solution but how do I do this with the data.

    asked by marla on February 6, 2012
  49. math

    Can someone please check my work? Question~ Find the point-slope form of the equation that goes through these two points. (1, 20) and (8, 4.5) My Answer~ Y= y2-y1/x2-x1 (4.5-20)/(8-1) = -15.5/7 Rewrite -15.5/7 as (-15.5)/7 Rewrite -15.5 as -31/2 = (-31/2)

    asked by Abby on January 13, 2016
  50. science

    A hawk flies in a horizontal arc of radius 12.0 m at a constant speed of 5.4 m/s. It continues to fly along the same horizontal arc but increases its speed at the rate of 2.8 m/s2. Find the acceleration magnitude under these conditions.

    asked by ahmad on August 6, 2015
  51. Chemistry

    How do you find a molality and molarity of a solution? given the equations Molarity=moles/liters molality=moles solute/kg.of solvent Just that way. Use the definiton. You must have a problem which you can't solve. Post it and tell us what you don't

    asked by Angie on May 9, 2007
  52. pme

    a bullet moving at 270 m/s penetrates 5 cm into a tree limb, beforecoming to rest assuming that the force exerted by the tree limb is uniform, find its magnitude? mass of the bullet is 10 g

    asked by babu lal on July 24, 2011
  53. Algebra

    A riverboat cruise line has a boat that can travel 76 mi downstream in the same time that it takes to travel 52 mi upstream. The speed of the current in the river is 1.5 mph. Find the speed of the boat in still water.

    asked by Paula on March 7, 2011
  54. maths --plse help me..

    The pilot of an aircraft flying horizontally at a speed of 1200 Km/hr observes an angle of depression of a point on the ground changes from 30 degree to 45 degree in 15 seconds. Find the height of the aircraft at which it is flying?

    asked by Meenakshi on December 13, 2012
  55. trignometry

    if alpha and beta are 2 different values of θ lying between 0 and 2π which satisfy the equation 6cosθ+8 sinθ=9 find the value of sin alpha + beta.i want the answer by quadratic method. can u help solving sum by that method

    asked by usha on June 11, 2011
  56. physics

    The Yerkes refracting telescope has a 1 m diameter objective lens of focal length 20 m.Assume it is used with an eyepiece of focal length 4.31 cm. Find the angular magnification of the planet Mars as seen through this telescope

    asked by Jim on March 21, 2011
  57. physics

    A 5.9 g coin sliding to the right at 23.4 cm/s makes an elastic head-on collision with a 17.7 g coin that is initially at rest. After the collision, the 5.9 g coin moves to the left at 11.7 cm/s.Find the amount of kinetic energy transferred to the 17.7 g

    asked by wendlen on March 17, 2013
  58. Algebra

    A.Write and solve an equation to find three consecutive integers with a sum of 126. Let n= the first integer. B. In part A, could you solve the problem by letting n= the middle integer,n-1= the smallest integer, and n+1= the largest integer?

    asked by Brianna on October 13, 2011
  59. physics

    A concrete wall of thickness one metre of a dam can withstand a side pressure of 10 5 2 N m- . Find the thickness of sidewall at the bottom of the water dam at a depth of 100 m. [ g = - 10 m 2 s and density of water = 10 3 kg/m3 ]

    asked by maha on April 1, 2014
  60. Algebra

    Below is my problem with my answers. I don't think this is that tough, but I cannot believe that my ABC answer's are a fraction. Did I do this correctly? Find the unknowns on the right side of the partial fraction.

    asked by Tim on April 18, 2008
  61. physics

    a rotating disc of mass 'm', radius 'r', thickness 'D' can rotate in vacuum with constant angular velocity 'w' . now the disc is placed in water of density 'p', find the time in which its angular velocity becomes half.

    asked by rishi on January 15, 2015
  62. math

    a plane with an airspeed of 192mi/h is headed on a bearing of 121 degrees. a north wind is blowing (from north to south) at 15.9 mi/h . find the ground speed and the actual bearing of plane.

    asked by T on May 24, 2008
  63. Stats

    The waiting times between a subway to Podger schedule and the arrival of the passenger on uniformly distributed between zero and nine minutes find the probability that a randomly selected passenger has been waiting greater than 3.25 minutes

    asked by Ella on March 11, 2015
  64. math

    write a five digit number(s) that fits each description. use only the digits that the athletes are wearing. use each digit only once in each answer. The digits on athletes are: 4,1,8,3,6 find all the numbers between 6.129 and 6.381. order them from least

    asked by John Dosley on December 11, 2013
  65. math

    A swimming pool has a base 10 m by 12 m. Water evaporates from the pool at a constant rate of 10 liters per hour. Find the amount of water lost in one week and the change of depth in one week.

    asked by Anonymous on May 17, 2017
  66. physics

    A sphere of radius a carries a volume charge density p=p (r/a)^2. Find the electric field inside and outside the sphere. I don't know what equation to use. Do I use electirc field due to point charge?

    asked by Jessica on February 28, 2008
  67. chemistry

    I need to find out which structure is more correct: Reaction of the compound C3H8O with CrO3 (oxidizing agent) yields acetone. Which of the three structures is more correct? (My three structures are as follows: 1-propanol, 2-propanol, and methylethyl

    asked by ella on January 18, 2011
  68. Math

    The perimeter of a rectangle is 36ft. the length is 10ft. longer than the width find the dimensions. Write a system linear equation an solve the resulting system let x be the length and y be the width.

    asked by Denise on August 5, 2013
  69. History

    Hey everyone, I am doing research about Confucius and my teacher told me to use the internet to do my research. The only problem is I cannot find an answer to this question if someone could help me out the question is: Why was Confucius never able to

    asked by Howard on November 30, 2018
  70. Math

    A weather forecast states that there is a 20% probability of rain on each of the next 3 days. Describe a simulation you could perform using random numbers to find the experimental probability that it will not rain on any of the next 3 days. Would love

    asked by Anonymous on April 5, 2017
  71. Math

    from a barrel of colored marbles, you randomly select 5 blue, 2 yellow, 3 red, 4 green, and 2 purple marbles. Find the experimental probability of randomly selecting a marble that is not yellow.

    asked by Maria on May 18, 2016
  72. Math

    The circular area A in square centimetres of a healing wound is given by A(r)=πr^2 Where r =the radius in centimetres. Find the rate of change of the area with respect to the radius. My work: I'm not really sure if this is correct but I gave it a try.

    asked by Nicki on February 24, 2016
  73. Physics

    A motorcyclist is trying to leap across a canyon by driving horizontally off a cliff (height= 60 m) at a speed of 25 m/s. The cycle strikes a cliff on the other side (height= 30 m) at a speed of 15 m/s. Find the work done by air resistance.

    asked by Daniela on November 11, 2015
  74. Applied Calc 2

    he marginal cost function for a manufacturing company is given by dollars per box, where q is the number of boxes manufactured. If , find the total cost of manufacturing 10 boxes. Round to the nearest dollar.

    asked by Anonymous on October 12, 2011
  75. Trig

    Find all solutions of the equation in the interval [0,2pi) 2 cos^2 x-cos x = 0 -2cos^2 + cosx + 0 (x+1/2) (x+0/2) (2x+1) (x+0) -1/2,0 2Pi/3, 4pi/3, pi/2, 3pi/2 my teacher circled pi/2 and 3pi/2 What did I do wrong? I don't understand...

    asked by Anonymous on April 10, 2017
  76. science

    A motorcyclist is trying to leap across a canyon by driving horizontally off a cliff (height= 60 m) at a speed of 25 m/s. The cycle strikes a cliff on the other side (height= 30 m) at a speed of 15 m/s. Find the work done by air resistance.

    asked by Daniela Belen on November 11, 2015
  77. physics

    A 2.31 × 103 kg car requires 4.2 kJ of work to move from rest to some final speed. During this time, the car moves 26.0 m. Neglecting friction, find a) the final speed. Answer in units of m/s

    asked by billybob on November 18, 2014
  78. Math

    a plane with an airspeed of 192mi/h is headed on a bearing of 121 degrees. a north wind is blowing (from north to south) at 15.9 mi/h . find the ground speed and the actual bearing of plane.

    asked by Tareena on May 24, 2008
  79. Eng. Essay - Writeacher

    Writeacher or Bobpursley, or anyone who could help me with my essay. I don't know why I cannot find the post that I needed help on, my essay was on traditional families versus TV show families. I included more information. I wish I could include the link

    asked by Farrell on February 20, 2012
  80. math

    In his algebra class, Rob has scores of 79, 85, 81, and 65 on his first four tests. To get a grade of C, the average of the first five tests must be greater than or equal to 70 and less than 80. Solve an inequality to find the range of scores that Rob can

    asked by jack on May 18, 2011
  81. Honors chemistry

    i am doing a project for school and i was told to research the alloy of 16 carat gold. I have found all the other information that i need, but i cannot find the melting or boiling point of 16 carat gold! please help soon my project is due tomorrow.

    asked by Anonymous on October 30, 2011
  82. Statistics

    A box contains four balls labeled 1,2,3,4 respectively. Two balls will be sequentially selected from the box at random without replacement. Let Y1 be the maximum of two outcomes and Y2 be the minimum of two outcomes observed. Find the joint probability

    asked by Ed on February 10, 2012
  83. algebra 1

    In February, you have a balance of $80 in your bank account. Each month you deposit $20. Let January = 1, February = 2, and so on. Write an equation for this situation. Use the equation to find the balance in December. y = 20(x – 4); $200 y - 80 = 20(x -

    asked by Lana on December 18, 2015
  84. physics

    a uniform rod of mass M is hinged at its upper end. A particle of mass m moving horizontally strikes the rod at its midpoint elastically. If the particle comes to rest after collision find the value of M/m

    asked by OINDRILA on November 20, 2012
  85. Maths

    (a) Find the points which divide the line joining A(1,3) and B(-4,-1) internally in the ratios: (i) 1:2 (ii) 1:1 (iii) 3:1 (b) On the same x-y axes plot the point A(1,3) and B(-4,-1) and draw the line joining them. Add the three points which you calculated

    asked by steven on October 31, 2016
  86. physics

    A speedboat increases in speed from 20 m/s to 30 m/s in a distance of 200m. Find (a) the magnitude of its acceleration and (b) the time it takes the boat to travel this distance. (a) (I am not sure what the magnitude is) (b) 200m x s/30m = 6.67s (is this

    asked by Anonymous on September 6, 2007
  87. Math Help!

    Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 17 5 2 24 Female 7 11 12 30 Total 24 16 14 54 If one student was chosen at random, find the probability that the student was female.

    asked by Anonymous on October 1, 2016
  88. maths

    each side of a square flower bed is 2cm and 8cm it is extended by diging strip of 30cm wide all around it,find the area of enlast and also increase in area flower bed.

    asked by manisha on January 19, 2011
  89. math

    how do you8 find unit rate divide quantity by time. For instance, one travels 45 miles in 1/2 hour. Unit rate= 45/.5=90miles/hr the answer to your problem is x=18 the answer to your problum is x=18

    asked by brianna on March 6, 2007
  90. English

    1. Most never ask ourselves if and how television might hurting us. (Do we have to use 'ourselves'? How about 'themselves' in place of 'ourselves'?) 2. Below you will find the costs and benefits of watching television. (Does 'costs' mean 'disadvantages'

    asked by rfvv on January 25, 2017
  91. math

    Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 60 people. (a) How many would you expect to be between 158 and 172 cm tall? 1 (b) How many would you expect to

    asked by Anonymous on August 29, 2012
  92. math 209

    The perimeter of a rectangle is 44ft the length is 4ft longer than the width. Find the demensions. Write a system of linear equations and solve the resulting system. Let x be the length and y be the width.

    asked by chris on July 17, 2011
  93. ALGEBRA

    Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 60 people. (a) How many would you expect to be between 159 and 171 cm tall? (b) How many would you expect to

    asked by Mike on June 10, 2012
  94. Math Help!

    Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 17 5 2 24 Female 7 11 12 30 Total 24 16 14 54 If one student was chosen at random, find the probability that the student was female.

    asked by Anonymous on October 1, 2016
  95. maths

    (a) Find the points which divide the line joining A(1,3) and B(-4,-1) internally in the ratios: (i) 1:2 (ii) 1:1 (iii) 3:1 (b) On the same x-y axes plot the point A(1,3) and B(-4,-1) and draw the line joining them. Add the three points which you calculated

    asked by Davon on October 31, 2016
  96. Math

    Can I get some help? 1. If v = (-5, -3), -5 ||v||^2 2. For the following vector v, find ||u||, the unit vector with the same direction angle as v. V = -25j Does u = -j? 3. True or False: To graphically add two vectors, V+w, using the tip-to-tail method,

    asked by mysterychicken on June 8, 2013
  97. Math

    in still water, a speed boat travels 5 times faster than the current of the river. If the speed boat can travel 48 miles upstream and then back in 5 hours, find the rate of the current.

    asked by Amy on March 7, 2016
  98. science

    there is a cup with 75ml of orange juice. A marble was dropped into the cup and the level of the juice rose to 90 ml. Why did this happen? Find the volume of the marble. Use math and show/label all work.

    asked by eddie on February 17, 2009
  99. Physics

    A rocket of mass 4.5 e5 kg is in flight. Its thrust is directed at an angle of 58.5° above the horizontal and has a magnitude of 7.50e6 N. Find the magnitude and direction of the rockets acceleration. Give the direction as an angle above the horizonal.

    asked by Joe on February 10, 2012
  100. Math

    In January, the price of a kilogram of potatoes at Supermarket X was $3.20. In May, a kilogram of the same type of potatoes cost $2.99. Find the percentage decrease in price. Express your answer correct to 1 decimal place.

    asked by Drake on October 4, 2016

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