1. Geometry

    in two congruent triangles the ratio of lengths of two corresponding sides is 5:8. If the perimeter of the larger triangle is 10 ft less than twice the perimeter of the smaller triangle find the perimeter of each triangle

    asked by Amy on February 12, 2017
  2. Repost Algebra

    What would it cost for ingredients , per cookie, to make 100 cookies? C=100/4x-28 is the equation given to find the cost. (Cost is equal to 100 over 4x minus 28)

    asked by Shannon on October 24, 2011
  3. Gr. 10 CIVICS!!!!please HELP!! :(

    can u please help me find a picture that shows one of the element in a democracy. the element is Being Informed and Getting Involved. the picture has to fulfill this element. thanks .u can just paste the site of the picture.

    asked by ARIAS on May 1, 2009
  4. Gr. 10 CIVICS

    can u please help me find a picture that shows one of the element in a democracy. the element is Being Informed and Getting Involved. the picture has to fulfill this element. thanks .u can just paste the site of the picture.

    asked by airas on May 1, 2009
  5. calculus

    find the equation of a quadratic function whose graph is tangent at x=1 to the line whose slope8, tangent at x=-2 to solve the line with slope-4 and tangent to the line y=-8

    asked by erika on February 28, 2011
  6. Menus ration

    a perimeter of a trapezium is 55cm and its non parallel sides are 8 cm and 7cm the difference between the length of parallel sides is 5 cm. find the lengths of the parallel sides

    asked by Athirika on January 27, 2013
  7. Math

    The perimeter of a rectangular soccer field is 20/3 meters. If the width of the soccer field is the reciprocal of the length, find the dimensions of the soccer field.

    asked by Bianca on September 22, 2012
  8. Algebra

    The edge of one cube is 5cm shorter than the edge of a second cube. The volumes of the two cubes differ by 875cm^3. Find the edge of the smaller cube.

    asked by Penny on January 29, 2013
  9. math (algebra honors)

    The edge of one cube is 2 cm shorter than the edge of a second cube. The volumes of the two cubes differ by 386 cm^3. Find the edge of the smaller cube using factoring.

    asked by K.S. on February 27, 2011
  10. CALCULUS!!!

    case 1. Find the absolute maxima and minina values of f(x)=sin2x+cos2x on [0, pie] Specify both the x and y coordinateof the absolute maximum and absolute minimum. Gives answers in exact form. case 2. Use the second derivative test for relative maxima nd

    asked by Mae on June 24, 2007
  11. college physics

    A student moves a box of books by attaching a rope to the box and pulling with a force of 80.0 N at angle of 45o. The box of books has a mass of 25.0 kg and the coefficient of kinetic friction between the bottom of the box and the sidewalk is 0.43. Find

    asked by amber on October 21, 2012
  12. math stats

    you draw from a deck. if you get a red card you win nothing. if you get a spade you win $5. for any club you win $10 plus an extra $20 for the ace of clubs. A. create a probability model for the amount you win. B. Find the expected amount you will win. C.

    asked by jessica on October 3, 2011
  13. math

    In 1980, the population of a certain country was about 161 000. since then the population has decreased about 1% per year. a. find an equation to model the population since 1980 b. estimate the population in 1990 c. suppose the current trend continues.

    asked by jefferson on November 16, 2011
  14. chemistry help

    For the reaction shown, find the limiting reactant for each of the following initial amounts of reactants? 2Na(s)+Br2(g) ---->2NaBr(s) 1. 2mol Na, 2mol Br2 2. 1.8mol Na, 1.4mol Br2 3. 2.5mol Na, 1mol Br2 4. 12.6mol Na, 6.9 mol Br2

    asked by Kimmie on September 24, 2014
  15. math 8th grade

    Face cards are removed from a standard deck of cards and the rest are set aside. two cards are drawn at random from the face cards. once a card is selected, it is not replaced. Find each possibility. P(jack and then king)? P(two black cards) answer 1/2 ?

    asked by jill on April 13, 2015
  16. Math repost

    trapezium ABCD, with AB and DC being parallel, with diagonal connecting A and C, angle ABC is 86, angle ADC is y, angle dac is 66 and angle bac is x, no angle given for bcd or bca or acd. find x and y, So I said that BCD is 94 deg, but then I get stuck I

    asked by Evie on February 5, 2014
  17. chemistry

    Find the molar masses of the following compounds: 1. LiI 2. PbCO4 3. Mg(OH)2 4. (NH4)3PO4 Find the percent composition (percent by mass) of the given element in the following compounds: 1. Fluorine in AgF 2. Hydrogen in glucose (C6H12O6) 3. Oxygen in

    asked by Alex on March 2, 2015
  18. art

    A sculptor creates a bust of a famous politician out of marble and places it in the outdoor courtyard of the capitol building. Why did he chose marble? A. he wanted to honor the politition by using expensive material. b. marble is cheap and east to find C.

    asked by meow on January 19, 2016
  19. A number thoery question

    Please help me! Thank you very much. Prove Fermat's Last theorem for n=3 : X^3 + Y^3 = Z^3 where X, Y, Z are rational integers, then X, Y, or Z is 0. Hint: * Show that if X^3 + Y^3 = Epsilon* Z^3, where X, Y, Z are quadratic integers in Q[sqrt(-3)], and

    asked by kate on November 15, 2006
  20. cHEMISTRY

    GIVE THE EMPIRICAL FORMULAE OF THE HIGHEST HYDRIDE AND HIGHEST FLUORIDE OF UNUNHEXIUM, EXPLAINING HOW YOU ARRIVED AT YOUR CONCLUSIONS Here is the web site for a very good periodic table. Look for element #116, Uuh. Elements in the periodic table have

    asked by Gemma on February 6, 2007
  21. Religion Correction/edit

    I have to find the following for Hinduism. can someone correct them for me please. what i need to find: Country of origin My answer: India Historical figures and events My answer: Theres no founder. Hinduism was developed out of Brahminism Central

    asked by kailin on January 17, 2007
  22. Chemistry

    Read earlier posts on this question and still find my self confused. The question being H2SO4(aq) -> 2H^+ (aq) + SO4^-2 (aq). A 21g sample of sulfric acid dissolved completely in sufficient water to make a 0.25 l of final solution. Calculate hydrogen ion

    asked by SOS mature student on February 18, 2007
  23. math

    The sum of the angles of a triangle is 180 degrees. In the figure below angle B and angle C are the same size. If angle A is 54 degrees smaller than angle B. Find the measure of each angle.

    asked by Anonymous on January 26, 2016
  24. math

    Amy bought some stationary from a bookstore. The total cost of 3 files A,B,C was $5.60 more than the total cost of 4staples. A cost $1.90 less than each of the other 2files. B cost $4.20 more than each staple. Find the cost of C

    asked by Gav on September 23, 2011
  25. stats 101

    how do you find the lower class limit,upper class limit, class width, class midpoint, and class boundaries from a set of frequencies data

    asked by kelly on July 30, 2012
  26. Algebra

    A triangle has a perimeter of 32 inches. The medium side is 7 more than the short side, and the longest side is 3 times the length of the shortest side. Find the shortest side. 32=s+m+l m=s+7 l=3s 32=s+m+l 32=s+s+7+3s 32=5s+7 -7 -7 25/5s=5s/5s 5=s

    asked by Keonn'a Tarvin on August 29, 2018
  27. Algebra

    A triangle has a perimeter of 47 inches. The medium side is 5 more than the short side, and the longest side is 4 times the length of the shortest side. Find the shortest side.

    asked by Keonn'a Tarvin on August 29, 2018
  28. math

    I'm trying to find the convolution f*g where f(t)=g(t)=sin(t). I set up the integral and proceed to do integration by parts twice, but it keeps working out to 0=0 or sin(t)=sin(t). How am I supposed to approach it? integral (sin(u)sin(t-u)) du from 0 to t.

    asked by chuck on December 3, 2009
  29. algebra

    a 38 inch piece of steels is cut into three pieces so that the second piece is twice as long as the first piece, and the third piece is three inches more than four times the length of the first piece. find the lengths of pieces.

    asked by maria on April 4, 2016
  30. maths

    the class-marks of classes in distribution are 6,10,14,18,22,26,30.find (a)class size (b)lower limit of second class (c)upper limit of last class (d)third class Explain in detail.

    asked by ujjval on February 24, 2013
  31. math

    Um... i cant find anything about this in the textbook, help??!! 1. m - 7 < 6 (1 point) m < -1 m > 1 m < 13 m < -13 2. x + 4.5 > 5.5 (1 point) - x > 10 - x > 1 - x > 0.1 - x < 1 - 3. p + 12 > 9 (1 point) p > 21 p > 3 p > -21 p > -3 4. Translate the

    asked by TTR+S<3 on January 3, 2014
  32. Math(Factorial)

    A women student is to answer 10 out of 13 questions on a test. Find the number of choices where she must answer: (a) the first two questions; (b) the first or second questions but not both; (c) exactly 3 out of the first 5 questions (d) at least 3 of the

    asked by Anonymous on April 9, 2014
  33. Research Writing

    How do you do this? I am lost. My topic I chose is Homeless. Summary of the Research Process I. Begin the project. A. Think about the assignment. B. Analyze your audience and the purpose for which you are writing. C. Select an appropriate topic. D.

    asked by Doris on August 26, 2008
  34. Science

    I need to write a paper (1500-2500)on Scientific Inquiry. I need to answer the impact society has had on the progress, if ethical or moral values figure into the research and sharing of information. I have used different search engines, but none have come

    asked by Kally on April 26, 2008
  35. Calculus 2 (Series)

    Can anyone help me start this problem from beginning to end, along with explanations on how to go about the problem for a better understanding how to do this series problem? 1) Find the values of p for which the series is convergent. Summation notation

    asked by Sena on April 6, 2015
  36. English-Scarlet Letter

    1.How do the male characters treat, or talk about the female characters? 2.If the female characters had a power what kind will it be? Economical, Psychological, Social, Political , etc and Why? 3. Dimmesdale punishes himself because he wants redemption. I

    asked by JESSICA on January 21, 2015
  37. Creative thinking in preschool

    Creative thinking in children is like creative thinking in adults in that they both: a. have experiences that are complex, challenging, and creative. b, have intelligence that develops onto skill. c. lack inhibition when responding to external stimuli. d.

    asked by GALEN on November 7, 2014
  38. Intro to Algebra

    In 19977, a math professor bought her condominium for $60,000. The value of the condo has risen steadily so that in 2007 real estate agents tell her the condo is now worth $750,000. Find a formula to represent these facts about the value of the condo V

    asked by Hailey McCarthy on September 10, 2016
  39. Calculus

    How would i start this problem? The amount that workers contribute monthly for health care insurance premiums can be modeled by A(t)=0.07t^3-3.1t^2 + 54.3t-230, where A is the monthly amount contributed and t is the number of years after 1980. Find the

    asked by Marilyn on October 19, 2009
  40. calculus homework help stuck

    Let s(t) denote the position of a particle at time t, and let v and a be the velocity and acceleration respectively. The particle is moving according to the data a(t)=10sin(t)+3cos(t) s(0)=-4 s(2pi)=1 find a function describing position of particle

    asked by the dude on November 22, 2017
  41. Math

    An open box is to be made from a 11 inch by 11 inch piece of cardboad. this box is constructed by cutting squares that measure x inches on each side from the corners of the cardboard and turning up the sides. Use a graphical calculator to find the height

    asked by Des on December 13, 2012
  42. math

    The minimum daily value (MDV)for certain foods are given. They are based on a 2,000 per day diet. Find decimal and fractional notation for the percent notation in each sentence. (a) 1 ounce of tostitos provides 9% of the MDV of fat. (c) 1/2 cup of

    asked by Peggie on September 2, 2008
  43. Physics

    A 600-kg weather ballon is designed to lift a 4000-kg package. What volume should the ballon have after being inflated with helium at standard temperature and pressure so the total load can be lifted up? The problem asks for volume. Take it a step

    asked by Daniel on November 10, 2010
  44. Math

    James uses a measuring wheel to find the length of a cross-country race course he holds the handle and rolls the wheel along the course.The wheel has a radius of 1 foot and it turns 2,000 times from the beginning to the end of the race course, how long is

    asked by Jaiden on March 12, 2013
  45. Physics

    A 600-kg weather ballon is designed to lift a 4000-kg package. What volume should the ballon have after being inflated with helium at standard temperature and pressure so the total load can be lifted up? The problem asks for volume. Take it a step

    asked by Daniel on November 11, 2010
  46. physics

    An electric motor exerts a constant torque of 10N⋅m to the shaft of a grindstone with mass 16kg and radius 0.5m. If the system starts from rest, find (a) the rotational kinetic energy of the grindstone after 8s, (b) the work done by the motor during this

    asked by joy on April 22, 2018
  47. Physics

    A lump of lead with mass 0.5kg is dropped from height of 20m onto a hard surface it doesn't rebound but remains there at rest for a long period of time. A, find change in heat , change in work, change in internal energy for the lead during this process?

    asked by Faf on December 22, 2016
  48. Physics

    A lump of lead with mass 0.5kg is dropped from height of 20m onto a hard surface it doesn't rebound but remains there at rest for a long period of time. A, find change in heat , change in work, change in internal energy for the lead during this process?

    asked by Faf on December 22, 2016
  49. p

    A roller coater has a first drop of 140 meters and then enters a circular loop. Find the maximum radius of the loop such that the coaster never leaves the track at the top of the loop. Using the radius found in part 1, calculate the largest centripetal

    asked by Mary on April 9, 2012
  50. Physics

    A lump of lead with mass 0.5kg is dropped from height of 20m onto a hard surface it doesn't rebound but remains there at rest for a long period of time. A, find change in heat , change in work, change in internal energy for the lead during this process?

    asked by Yeabsera on September 29, 2018
  51. chemistry

    Question: how to solve for a 28.4 L sample of methane gas is heated from 35.0° C to 76.0° C. The initial pressure of the gas is 1.00 atm at 35.0° C. Assuming constant volume, what is the final pressure of the gas? Could someone give me the setup for

    asked by sandy on November 22, 2011
  52. Physics

    A pole-vaulter of mass 59.9 kg vaults to a height of 5.9 m before dropping to thick padding placed below to cushion her fall. (a) Find the speed with which she lands. m/s (b) If the padding brings her to a stop in a time of 0.48 s, what is the average

    asked by Priyanka on March 16, 2012
  53. Physics

    A uniform ladder of mass 30kg and length 5m rest against a smooth vertical wall with its lower end on a rough ground. The coefficient of friction is 0.4.the ladder is inclined at 60 degrees to the horizontal. Find how far a man of mass 80kg can climb

    asked by Steven on October 20, 2018
  54. phisics

    a car starts from rest and is accelerated uniformly and the rest of 2m/s2 for 6seconds it then maintaining a constant speed for half a minutes.The brake are then applied and then vehicles unifomly restarted to rest in 5seconds.find maxmum speed in km/h and

    asked by sam on November 8, 2016
  55. BUSINESS

    1. You've told Dan, a new contact, that you're looking for a qualified sales representative. Now you want to find out if there's any way you can help his business. What's an effective way to approach the question? A. Give him your business card and tell

    asked by Beatrice on February 11, 2014
  56. chemistry

    State how you would prepare each solution: 1) 455g of a solution of C3H5(OH)3 in water in which the mole fraction of glycine is .250 2) 755g of 1.4 molality solution of napathalene C10H8 in benzene C6H6. My instructor told us to find the amount of grams in

    asked by Amid on January 28, 2014
  57. ??????????!!!!!!!!!!!!!!!!!

    Hello! I am a new teacher and was wondering what great websites I can go on to find free worksheets, bulletin board themes, etc. for pre-k! I know it's not homework, but it just seems that there isnt a lot of good websites (well, that I cant find! ;))

    asked by Websites Please! on November 13, 2006
  58. Chemistry

    In a previous experiment, 0.800 g of the green complex iron salt was placed in an Erlenmeyer flask and heated with concentrated sulfuric acid until all oxalate ion was destroyed (CO2, SO2 and H2O are formed). Ferric ion (Fe3+) remained in solution and was

    asked by Linda on May 7, 2007
  59. history

    i am not quite clear why the No child left behind act has been called unconstitutional. Many articles that I've read say that it is because it requires states to pay to go forth with the program. It violates the spending clause but can anyone explain

    asked by maggie r on April 19, 2008
  60. business english

    During a group meeting when they are each reading a draft of their formal report, Madiha and Anne realize that sometimes they have used the word "there" correctly and sometimes the word should be "their." They use their word processor's "find" feature to

    asked by sososola2012 on February 9, 2012
  61. Physics

    A revolving door consists of four rectangular glass slabs,with the long end of each attached to a pole that acts as the rotation axis. Each slab is 2.60m tall by 1.50m wide and has mass 39.5 . Find the rotational inertia of the entire door. If it's

    asked by Lauren on July 5, 2012
  62. CULTURAL DIVERSITY

    PLEASE REVISE. THAN YOU This group is the same as a subordinate group. A defining feature of this group is that its members have less control or power over their lives than do members of dominant groups. Minority Group This describes the social structure

    asked by Rimmy on April 3, 2009
  63. trig

    To guard against a fall, a ladder should make an angle of 75o or less with the ground. What is the maximum height that a 20-foot ladder can reach safely to the nearest tenth of a foot? in my diagram I set it up using the sin function since I want to find

    asked by Anonymous on June 2, 2014
  64. business 110

    I am taking a business class and I cant find an aswser for this question can someone help? Cory is at the top of her companys organization chart. Which of the following is most likely to be her job title? Choose one answer. a. executive manager b.

    asked by sharon on February 20, 2012
  65. Physics

    Take the radius of the earth's orbit to be 1.5 x 1011 m. a. Using a year to be 365 days, find the speed of the earth as it moves around the sun. __m/s b. Convert this speed to miles/hour (show your conversion factor in your written backup). __miles/hour

    asked by Kelly on March 5, 2012
  66. calculus

    Find two unit vectors that make an angle of 60° with v = ‹3, 4›. Give your answers correct to three decimal places. I'm not sure what to do here; I believe that I use to definition of a dot product (or maybe cross product) with relation to the trig

    asked by angles on August 24, 2011
  67. science/math

    write and solve an algebraic equation to find the original mass of the sample of the radioactive isotope uranium -235, which has a half-life of 704 million years your sample is about 700 million years old and weighs 120 grams

    asked by Justin on November 27, 2012
  68. statistics

    A researcher is interested in estimating the average salary of teachers in a large urban school district. She wants to be 95% confident that her estimate is correct. If the standard deviation is $1050 (σ = 1050), how large of a sample is needed to be

    asked by jr on October 29, 2012
  69. research paper

    i have to include these questions in my report, and i can't seem to find them anywhere, any help? What influences may China and India have on other Asian countries as their economies begin to emerge on the global scene? What benefits have American

    asked by devon on February 10, 2008
  70. Chemistry

    My prelab is telling me to find the initial concentrations of I(^-) and S208(^2-) given the following reaction: 25 mL of 0.2 M KI + 48.00 mL 0.2 M KNO3 + 1 mL 0.4 M Na2S2O3 + 1 mL starch + 25 mL 0.2 M (NH4)2S2O8 + 1 drop EDTA How do I calculate the

    asked by Louise on October 4, 2014
  71. Physics

    A 1-lb stone is heaved vertically upward with a speed of 40 ft/s from the top of a 100-ft cliff, and it hits the water below 100-ft below (narrowly missing the thrower on the way down). WATCH YOUR UNITS!! Find the stone's a) Total energy at time zero (set

    asked by Addie on April 28, 2012
  72. algebra

    For problems 13 and 14, assign each letter and a blank space to a number as shown by the alphabet table below. Use the code [1,-2_-3,7] encode the phrase "ONE QUESTION TO GO" The matrix C=[1,-2_-3,7] was used to encode a phrase to

    asked by lee on April 4, 2013
  73. physics

    a yo-yo of mass 440kg measuring 0.9m in radius was dropped from a platform 63m high. One end of the string was tied to the platform, so the yo-yo unwinds as it descends. Assuming the axle of the yo-yo has a radius of 0.2m, find the velocity of descent at

    asked by samantha on December 29, 2010
  74. Physics

    A 1480 kg automobile has a wheel base (the distance between the axles) of 2.9 m. The center of mass of the automobile is on the center line at a point 1.34 m from the front axle. Find the force exerted by the ground on each back wheel. The acceleration of

    asked by DW on November 9, 2013
  75. Physics

    On the map, let the +x-axis point east and the +y-axis north. An airplane flies at 990 km/h northwestward direction (i.e., midway between north and west). Find the components of its velocity. Repeat for the case when the plane flies due south at the same

    asked by Anonymous on January 26, 2017
  76. Chemistry

    My prelab is telling me to find the initial concentrations of I(^-) and S208(^2-) given the following reaction: 25 mL of 0.2 M KI + 48.00 mL 0.2 M KNO3 + 1 mL 0.4 M Na2S2O3 + 1 mL starch + 25 mL 0.2 M (NH4)2S2O8 + 1 drop EDTA How do I calculate the

    asked by Louise on October 4, 2014
  77. Physics Circular Motion

    A swing ride at a carnival consists of chairs that are swung in a circle by 13.5-m cables attached to a vertical rotating pole. Suppose the total mass of a chair and its occupant is 170 kg, the angle θ = 53° with the vertical pole. Find the speed of the

    asked by Jayesh on February 20, 2015
  78. Physics

    Two fully charged capacitors (C1 = 2.00uF, q1=6.00uC,C2=8.00uF, q2 = 12.0 uC). The switch is closed, and the charge flowed until equilibrium is re-established, which occurs when both capacitors have the same voltage across their plates. Find the resulting

    asked by Eric on February 17, 2010
  79. Chemistry

    My prelab is telling me to find the initial concentrations of I(^-) and S208(^2-) given the following reaction: 25 mL of 0.2 M KI + 48.00 mL 0.2 M KNO3 + 1 mL 0.4 M Na2S2O3 + 1 mL starch + 25 mL 0.2 M (NH4)2S2O8 + 1 drop EDTA How do I calculate the

    asked by Louise on October 4, 2014
  80. chemistry

    15.0g of potassium trioxocarbonate(v) was crushed as heated with 0.1g of manganese (iv)oxide. 1) write the equation for the reaction. 2) calculate the mass of components produced assuming the reaction was complete. 3) find the volume of oxygen produced at

    asked by Anonymous on June 16, 2019
  81. physics

    an insulated circular ring of diameter 6.50cm carries a 12.0 A current and is tangent to a very long, straight insulated wire carrying 10.0 A of current. find the magnitude and direction of the magnetic field at the center of the ring due to this

    asked by jennifer on March 30, 2011
  82. Trig

    Half angle identities Find exact values of a) cos 1/2 b) sin 1/2 c) tan 1/2 based on: cos = 1/5 greater than 270 deg less than 360 deg. I get a) - rt 3/5 b) rt24/5 and c) does not work out at all .... Help please.. book says for answers a)-rt15/5 b) rt10/5

    asked by Don on January 1, 2012
  83. Math

    maria's bicycle has a diameter of 64 cm. as she rides at the speed of 21.6 km/h, she picks up a stone in her tire. draw a graph that shows the stone's height above the ground as she continues to ride at this speed for 2 s more. can someone please help me

    asked by Allison on December 11, 2010
  84. physics

    In a particular crash test, an automobile of mass 1369 kg collides with a wall and bounces back off the wall. The x components of the initial and final speeds of the automobile are 10 m/s and 1.9 m/s, respectively. If the collision lasts for 0.18 s,

    asked by Anonymous on December 23, 2012
  85. Physics

    A 17.9 kg block is dragged over a rough, hor- izontal surface by a constant force of 74.1 N acting at an angle of angle 32.3◦ above the horizontal. The block is displaced 72.4 m and the coefficient of kinetic friction is 0.242. Find the work done by the

    asked by Kaylee on June 22, 2014
  86. Calculus

    These are the two problems from my homework I don't get.. can you help me? A: y=2x-x^3 [0,1] use the limit process to find the area of the region between the graph of the function and the x-axis over the given interval. Sketch the region B:

    asked by Wesley on December 5, 2011
  87. Physics - please, I really need help

    a car attempts to stop and slides 25.5m while accelerating at -4m/s^2. The car's initial velocity was 20m/s. Find the time the slide took. Note that the final velocity is not known and that you need a quadratic solution. I know the quadratic formula, but

    asked by Sam on February 3, 2009
  88. Calculus

    A hot air balloon headed due east at a speed of 20 miles per hour and at a constant altitude of 180 feet passes directly over an intersection. Find an expression for the balloon's distance d (measured in feet) from the intersection t minutes later.

    asked by Elizabeth on September 26, 2012
  89. math

    An open box is to be made from a square piece of material by cutting four-centimeter squares from each corner and turning up the sides (see figure). The volume of the finished box is to be 576 cubic centimeters. Find the size of the original piece of

    asked by Anonymous on February 10, 2017
  90. Math

    The amount of nitrogen dioxide A in parts per million (ppm) that was present in the air in the city of Homer on a certain day in June is modeled by the function A(t) = -2t^2 + 32t + 12, where t is the number of hours after 6:00 A.M. Use this function to

    asked by Bryce on June 14, 2012
  91. Math

    Find the rotation in revolutions per minute given the angular speed and the radius given the linear speed and the rate of rotation. 1. w= 2.7 rad/s 2. v=24.8 m/s, 120 rev/min 3. w= 4/3Pi rad/hr Please help me with these problems! I am a visual learner and

    asked by Sarah on May 2, 2016
  92. engineering

    b) The crank OA of a mechanism, as shown in the figure, rotates clockwise at 120 r.p.m. The lengths of various links are OA = 100 mm ; AB = 500 m ; AC = 100 mm and CD = 750 mm. Find by instantaneous centre method: 1. Velocity of point C. 2. Velocity of

    asked by Ali on December 30, 2016
  93. Physics

    Given: The universal gravitational con- stant is 6.672 × 10−11 N m2/kg2. Objects with masses of 152 kg and 269 kg are separated by 0.45 m. A 53.5 kg mass is placed midway between them. Find the magnitude of the net gravitational force exerted by the

    asked by Bob on May 3, 2012
  94. Washington state history

    How did OPEC’s oil embargo directly affect Washington? A.It caused fuel shortages B.It caused many oil workers to find other jobs. C.It led to a steep drop in gas prices. D.It led to the closing of local drilling operations.

    asked by jason on June 6, 2017
  95. Calculus

    a sandbag is dropped from a balloon at a height of 60 meteres when the angle of eleveation to the sun is 30 degrees. find the rate at which the shadow of the sandbag is traveling along the ground when the sandbag is at a height of 35 meters. hint: the

    asked by Anonymous on November 9, 2009
  96. statistics

    Assume that the readings on the thermometers are normally distributed with a mean of 0 degrees and standard deviation of 1.00 degrees C. A thermometer is randomly selected and tested. Draw a sketch and find the temperature reading corresponding to p

    asked by sandy on October 30, 2014
  97. Physics

    A 62 kg water skier, moving at 14 m/s , lets go of the towline. a.Find her momentum. 868kgm/s b.What impulse is needed to bring her to rest? -868Ns c.If the water exerts an average force of -275 N on the skier, how long must the force act? 3.16 s d.How far

    asked by DB on January 4, 2012
  98. Physics

    A 20 kg rod is 3 meters long and is attached to the wall by a hinge at point A and is held at the angle indicated by cable BC. Find the force in the cable and the forces in the x and y-directions at the hinge A. (center of mass in middle of rod downwards)

    asked by Beth on April 10, 2011
  99. math

    a tray with a square base is to be made from a square piece of cardboard by cutting 5 inch squares from each corner and folding up the sides. If the box is to hold a volume 520 cubic inches, find the length of the piece of cardboard that is needed.

    asked by Noel on March 11, 2015
  100. Chemistry

    im not quite sure what to do with this problem... the info I have: -balanced equation= (CuCl2*2H20)=>CuCl2+2H2O -initial mass of copper compound: 0.94g Q: use stiochiometry to find the theoretical yield for the mass of copper (II) chloride we also used

    asked by Sophie on February 28, 2010

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