1. Biology

    Find a recent (from 2009 June onwards) and interesting article from the mass media with a theme that is related to topics learnt in Cell Biology. So far I've learnt Membrane Structure & function,Organelles and their structure & function, as well as their

    asked by alex on February 17, 2010
  2. word problem

    Rahim has 5 boxes of sweets.Each box contains y sweets.His teacher gives him another 8 sweets. (a) Find the total number of sweets Rahim has in terms of y. (b) If y=4,how many sweets does Rahim have altogether?

    asked by kimi on September 24, 2011
  3. algibra1

    One side of the triangle is twice as long as the second side. The remaining side is 4cm greater than the second side. The perimeter of the triangle is 24cm.Find the length of each side of the triangle.

    asked by michael on September 15, 2014
  4. Algebra

    Could anybody help me with these two problems, or at least the 1st one? Thank you very much. „« The measure of the third angle of a triangle is 38 degrees more than the second angle. The measure of the first angle is two less than twice the second

    asked by Aria on May 16, 2011
  5. college - chemistry

    Hi, I was wondering if anyone could provide me the necessary information to solve this problem. For the following elements: CdSe CsI Li2O KBr NaCl ZnS(I) I've been asked to find the -Unit Cell of Larger ion -Type of Hole where Smaller Ions are found -# of

    asked by Anonymous on February 16, 2009
  6. Chemistry

    h2c4h4o4 + 2naoh --> 2h2o + na2c4h4o4 as for the previous question im sorry i forgot to plug the maleic acid in the formula properly. so this ones it ^ .2213 of c4h4o4 used (maleic acid) and .1 M NaOH 1. show the equation for 1st and 2nd ionization 2. find

    asked by Ruby on March 12, 2012
  7. college - chemistry

    Hi, I was wondering if anyone could provide me the necessary information to solve this problem. For the following elements: CdSe CsI Li2O KBr NaCl ZnS(I) I've been asked to find the -Unit Cell of Larger ion -Type of Hole where Smaller Ions are found -# of

    asked by Anonymous on February 16, 2009
  8. stats

    On the third day of Statistics, my teacher gave to me….three French hens. Because she is in a hurry, she randomly selects three pets from the local pet store. Find the probability that she selected three French hens. Hens Chickens French 10 20 American

    asked by Urgent help Confused Please Help on December 23, 2015
  9. Statistics

    On the third day of Statistics, my teacher gave to me….three French hens. Because she is in a hurry, she randomly selects three pets from the local pet store. Find the probability that she selected three French hens. Hens Chickens French 10 20 American

    asked by Danny on December 23, 2015
  10. College Math

    LPG is stored in highly insulated spherical vessels in most oil refineries. If the inside diameter of one of these tanks is 11.4 ft, find it's volume. Report your answer to the nearest one-tenth of a gal. Use pie-3014, and 1cubic ft= 705 gal. Possible

    asked by Carol on August 31, 2012
  11. MATH

    1. Subtract 0.36 from 6. A~ 5.64? 2. Write the following as a common fraction or mixed number. Write your answer in lowest terms. 6.38 A~6 19/50? 3. Find the area of the shaded part in the figure. Use 3.14 for and round your answer to one decimal

    asked by A~ on September 20, 2009
  12. maths

    1,The sum of $3000 is placed in the savings account. If money worth 6% compounded semi annually, what is he balance in the account after 7 year? Assume no other deposit and no withdrawals are made.2,The demand function of a manufacturers production is

    asked by ifeanyi chinedu chris on February 13, 2013
  13. Anatomy and physiology

    1)Why is enzymatic catalysis essential for life? Describe in detail the mechanism for enzyme mediated anabolic and catabolic reactions. What are the various modes of inhibition. 2) "every energy transfer increases the entropy of the system" .why? (hint-

    asked by Heather on January 21, 2013
  14. Science/Language

    Alright.... i asked this question last night, but i'm going to be a bit more clear this time. My Language teacher is doing a big unit on "stuff",(What happens to all of the stuff on earth). My job in this project is to find the extraction of a crayon. So

    asked by Dawn on March 25, 2008
  15. For the Jiskha Volunteers

    Teachers open up young minds, showing them the wonders of the intellect and the miracle of being able to think for themselves. A teacher exercises the mental muscles of students, stretching and strengthening, so they can make challenging decisions, find

    asked by mysterychicken on December 19, 2009
  16. English

    find 4 to 6 credible web sites or articles that support, oppose, or simply present information about bilingualism in education or politics.

    asked by jeana williams on February 28, 2007
  17. science

    Discuss the results of your research about the roles of nature versus nurture on human health. Share your opinion about how an individual’s genetic makeup interacts with nutrition, smoking, drug use, or exercise to affect the quality and length of life.

    asked by schoolnerd on December 3, 2014
  18. accounting

    I need an understanding of a few matters in my accounting class: 1) what are annuities and why is it necessary to calculate there present value? 2) How does the frequency of interest compounding, regardless of the rate of interest or period of accumulation

    asked by Stumpped on Accounting on March 31, 2010
  19. Primates

    Where can I find information regarding when different types of primates showed up in earth's history?

    asked by tricia on April 20, 2007
  20. algebra

    I have a few questions that I don't understand hope someone can help. 1)write an equation of th line, in point slope form, that passes through the two given points. (-17,8),(3,-2) I figured (y-8)=-2(x+17) not sure 2) the graph of g(x) is f(x) vertically

    asked by kevin on September 17, 2012
  21. math(pls help me)

    1.The management committee of Zenith has indicated its desire to accept only 40% of all continuing undergraduate based on the results of the end-of-second semester examinations.the mean score of the examination is 500 and standard deviation of 100.Find the

    asked by Ruby on April 5, 2016
  22. algebra 2(check)

    1)Choose the correct description of the system of equations:2x+3y=10 and 4x+6y=20. I got consistent/dependent 2)The first equation of the system is multiplied by 2. By what number would you multiply the second equation to eliminate the x variable by

    asked by maddie on July 27, 2007
  23. physics

    A 52 kg skier is at the top of a slope, as in the figure. At the initial point A, the skier is 17.7 m vertically above the final point B. The acceleration of gravity is 9.81 m/s2 . Find the difference in gravitational po- tential energy associated with the

    asked by carlos on December 15, 2010
  24. English

    So for English we're doing poetry. With a partner we both wrote our own poems and compared them. We had to find one word that fits into both poems and we got the word "Change". Now we have to be able to read our poems while not boring the class by doing

    asked by Brian on May 17, 2009
  25. physics

    A 52 kg skier is at the top of a slope, as in the figure. At the initial point A, the skier is 17.7 m vertically above the final point B. The acceleration of gravity is 9.81 m/s2 . Find the difference in gravitational po- tential energy associated with the

    asked by carlos on December 15, 2010
  26. calculus

    If a ball is thrown straight up into the air with an initial velocity of 70 ft/s, it height in feet after t second is given by y = 70 t - 16 t^2. Find the average velocity for the time period begining when t = 1 and lasting (i) 0.1 seconds (ii) 0.01

    asked by Anonymous on September 14, 2011
  27. chem

    Ammonia reacts with oxygen to form nitrogen dioxide and water according to the following equation: 4NH3(g) + 7O2(g) ® 4NO2(g) + 6H2O(g) You react ammonia and oxygen, and at the end of the experiment you find that you produced 27.0 g of water, and have

    asked by mich on November 2, 2009
  28. physics

    A 52 kg skier is at the top of a slope, as in the figure. At the initial point A, the skier is 17.7 m vertically above the final point B. The acceleration of gravity is 9.81 m/s2 . Find the difference in gravitational po- tential energy associated with the

    asked by carlos on December 15, 2010
  29. Calculus

    Let f be the function defined for x >or= to 0 with f(0)=5 and f', the first derivative of f, give by f'(x)=e^(-x/4)sin(x^2). A) Use the graph of f' to determine whether the graph of f is concave up, concave down, or neither on the interval 1.7

    asked by Leanna on February 9, 2011
  30. physics

    A 52 kg skier is at the top of a slope, as in the figure. At the initial point A, the skier is 17.7 m vertically above the final point B. The acceleration of gravity is 9.81 m/s2 . Find the difference in gravitational po- tential energy associated with the

    asked by carlos on December 15, 2010
  31. physics

    A 52 kg skier is at the top of a slope, as in the figure. At the initial point A, the skier is 17.7 m vertically above the final point B. The acceleration of gravity is 9.81 m/s2 . Find the difference in gravitational po- tential energy associated with the

    asked by carlos on December 15, 2010
  32. physics

    A 52 kg skier is at the top of a slope, as in the figure. At the initial point A, the skier is 17.7 m vertically above the final point B. The acceleration of gravity is 9.81 m/s2 . Find the difference in gravitational po- tential energy associated with the

    asked by carlos on December 15, 2010
  33. Physics

    A 4 kg block resting on a frictionless horizontal ledge is attached to a string that passes over a pulley and is attached to a hanging 2 kg block. The pulley is a uniform disk of radius 9 cm and mass 0.2 kg. a. Find the speed of the 2 kg block after it

    asked by MUHAMMAD JUNAID on April 9, 2019
  34. Algebra

    Suppose that a cyclist began a 390 mi ride across a state at the western edge of the state, at the same time that a car traveling toward it leaves the eastern end of the state. If the bicycle and car meet after 6.5 hr and the car traveled 32.4 mph faster

    asked by Sam on October 2, 2016
  35. Physics

    An 8.0g bullet is fired into a 2.5 Kg block at rest at the edge of a friction-less table of height 1.0 m. The bullet remains in the block and after the impact the block lands (d) distance from the bottom of the table. Find the initial speed of the bullet.

    asked by Aziz on December 15, 2015
  36. health

    what is the risk factor for the following situation? You and your friend go to a movie. After the show, your friend’s mom comes and they ask you if you need a ride, but you tell them that your mom was going to pick you up so they leave. You then check

    asked by Anonymous on December 27, 2012
  37. math

    Multiply and simplify 2/3*13 The answer is 22. Right? if you mean (2/3) * 13 or 2 / (3*13) i believe according to both your answer is wrong Is that (2/3)*13? If so, then (2*13)/3= something other than 22. Or if it is 2/(3*13) = it is not 22. Show your work

    asked by KC on August 19, 2007
  38. Math

    Please help if you can. If a ball is shot projected straight upward at a rate of 64 feet per second from a rooftop, 80 feet above ground level, the height of feet above ground is modeled by the equation, h(t)=-16t^2+64t+80 Find h(0), h(1),h(2) Use the

    asked by A.J. on November 21, 2009
  39. science

    a car of mass 1360 kg descends from a hill of height 86 m at a constant speed of 20 km/h. assuming that all the potential/kinetic energy of the car goes into heat in the brakes, find the rise in temperature of the brakes (use the heat capacity (C) of the

    asked by kelsee on April 26, 2008
  40. Probality

    in a case in riverhead, New York, nine different crime victims listened to voice recordings of five diffent men. All nine victims identified the same voice as that of the criminal. If the voice identified were made by random guesses, find the probality

    asked by Anonymous on March 28, 2013
  41. Math

    Suppose that a cyclist began a 450 mi ride across a state at the western edge of the state, at the same time that a car traveling toward it leaves the eastern end of the state. If the bicycle and car met after 7.5 hr and the car traveled 30.4 mph faster

    asked by Daniel on November 29, 2015
  42. Reading

    Herbs have been an integral part of our diet and pharmacy since humans began roaming the Earth. Dog owners can apply the results of using herbal nutrition and medicine for the dogs they love. To keep your dog healthy, use herbs to on a daily basis. If you

    asked by Lili on May 10, 2019
  43. Statisitics

    In a large section of a Chemistry class, the points for the final exam are normally distributed, with a mean of 72, and a variance of 81. Grades are to be assigned according to the following rule: the top 10% receive As, the next 20% receive Bs, the middle

    asked by Hulio on March 28, 2013
  44. Algebra

    if y varies direct as 8, and y is -60 when x is -5, find y when x is 3. gurl i don't no i need help myself Assume y's direct function is either a multiplication or division; I chose the second one. So a trial shows y at -60 = x at (-5 + const 1) x const 2

    asked by Ashley on December 5, 2006
  45. H.W in Partial economy

    Bundle** Oranges/Week ** Total Utility A 0 50 B 1 80 C 2 100 D 3 115 E 4 125 F 5 133 G 6 139 H 7 144 I 8 146 J 9 147 K 10 147 L 11 147 M 12 147 N 20 147 From the above table draw TU curve and MU curve find MU when using the fourth oranges, then derive the

    asked by sara on October 7, 2011
  46. Math Multiplying Fractions

    A swimming pool in the shape of a rectangular prism is 50 meters long 25 meters wide and 3 meters deep. A liter is the same as 0.001 cubic meters. How many liters of water are needed to completely fill the pool? I know how to find the volume which is 3750

    asked by Jerald on February 4, 2014
  47. 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 choose marble A-he wants to honor the politician by using an expensive material B-marble is cheap and easy to find

    asked by Lauren on February 10, 2015
  48. Algebra

    If anyone could please just look these over: The given measures are the perimeters of squares. Find (a) the length of a side and (b) the area of the square. Perimeters: 1.) 20 cm 2.) 100mm 3.) 4ft 4.) 2in 5.) 2.8m My answers: 1.) a- 5cm b- 25cm squared 2.)

    asked by Jamie on September 15, 2007
  49. Uniswa

    A stone thrown from the top of a building which is 30m is given an initial velocity 20m/s verticaly upward.the stone misses the edge of the building on its way down. A,what is the velocity of the stone after 1second,n after 3seconds. B,find the maximum

    asked by Mancoba on February 16, 2011
  50. simple intrest

    My daughter brought home a work sheet and I have no clue where to begin to help her and she seems to have no clue either. the questions are 1. Find the final balance in each account. $800 at 4.25% simple intrest for 6 years 2. $2,000 at 6% compounded

    asked by Veronica on February 20, 2007
  51. math

    Im stuck on this question. Could someone answer it. Id appreciate it. The projected rate of increase in enrollment at a new college is estimated by: dE/dt = 9000(t + 1)^-3/2 where E(t) is the projected enrollment in t years. If the enrollment is 5000 now

    asked by JL on April 24, 2011
  52. algebra1 HELP PLEASE Thanks you!!

    The function f(x)=5 square root of x gives the speed in feet per second (ft/s) of a free-falling object after it has fallen x feet (ignoring air resistance). FInd the speed of the object after it has fallen 25 feet. If necessary, round your answer to the

    asked by lisa on July 12, 2013
  53. College algebra

    The population P of a city has been increasing at an annual rate of 1.4%. It's population was 173 thousand in 1992. A. Find a formula for P(t), where t is the year and P is in thousands. B. Estimate the population in 2010, to the nearest thousand. C. In

    asked by Taylor on May 12, 2013
  54. Calculus - need help!

    Use the definition of the derivative to find f'(x) 1. f(x) 2x^2 + x - 1 Before the final step, my 'result' looked weird and I think I did something wrong in my arithmetic...someone correct me? Here's my work... BEGINNING STEP: lim [2(x + deltaX)^2 - (x +

    asked by NaNa on October 11, 2007
  55. math, drbob222

    For this problem is it only asking for the exprssion(formula). Or do they want me to solve it. (1) A triangle has sides 3x+7,4x-9,and 5x+6. Find the expression that represents its perimeter. My answer:P=a+b+c I think the question is asking for the

    asked by Jasmine20 on December 12, 2006
  56. Math

    Use a system of equations to find the quadratic function f(x) = ax^2 + bx + c that satisfies the equations. Solve the system using matrices. f(−2) = 4, f(1) = −2, f(2) = −12 The answer i got is f(x)=-2x^2-4x+8 this is the steps of how i got

    asked by anonymous on April 9, 2019
  57. Oral Book Report

    My book is titled The Battle Of The Labyrinth. I have to do a Sentence Outline for this Oral Book Report. But i don't know where to start from to write my sentence outline. Should i go over the book again, or just find important stuff about it? The author

    asked by Losa on October 7, 2012
  58. Math/Probability/Statistics

    Find the expected value and the standard deviation in the following raffle: Value Tickets Grand Prize: $2,000.00 1 Second Place Prize: $800.00 20 Third Place Prize: $40.00 60 Fourth Place Prize: $30.00 300 Total Number of Tickets Sold: 10000

    asked by Anonymous on October 22, 2015
  59. Phys

    A person stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.74 of the person's regular weight. Calculate the magnitude of acceleration of the elevator. Find the direction of acceleration

    asked by Ashley on September 23, 2009
  60. Geometry

    1) Find the lengths of the legs of two possible triangles whose areas would be as close as possible to one square inch without going under. 2) What if the triangle has to be an isoceles triangle? (area must be close to one square inch) (Give answers in

    asked by Katie on November 11, 2010
  61. physics

    a girl pulls a wagon along a level path for a distance of 15.0 m. the handle of the wagon makes an angle of 20.0 degrees with the horizontal, the girl exerts a force of 35.0 N on the handle. Friction provides a force of 24.0 N. Find the net work done on

    asked by lalaglaze on October 19, 2009
  62. Physics

    A speedboat moves on a lake with initial velocity vector v1,x = 8.57 m/s and v1,y = -2.61 m/s, then accelerates for 6.67 seconds at an average acceleration of aav,x = -0.105 m/s2 and aav,y = 0.101 m/s2. What are the components of the speedboat\'s final

    asked by Breauna on February 13, 2015
  63. Chemistry

    A silver-copper alloy had a mass of 0.1264g. When the alloy was dissolved in nitric acid and the silver precipitated as silver chloride, the precipitate had a mass of 0.1375g. Calculate the percent of silver in the alloy. So, how would you do this? Is it

    asked by Mat on September 4, 2008
  64. Algebra

    A person invested $7000 for 1 year, part at 5%, part at 10%, and the remainder at 15%. The total annual income from these investments was $815. The amount of money invested at 15% was $200 more than the amount invested at 5% and 10% combined. Find the

    asked by Emma on November 24, 2015
  65. math

    In vanessa's coin bank there are 4 times as many quaters as nickels, 2 fewer dimes than nickels, and 15 pennies. the total amount in the bank is $5.80. How many of each coin are in the bank? assign a variable to unknown and write an equation to find

    asked by Niki on July 24, 2012
  66. math

    A card is drawn at random from an ordinary deck of playing cards. Find the following odds. A. Odds in favor of drawing a 5,6,7 B. Odds against drawing a king, queen, jack, or ace D.Odds against drawing an even numbered (2,4,6,8,10)card. Can I get some help

    asked by grey on March 25, 2010
  67. Math

    An open box is made from a square piece of metal by cutting out a 4 inch square from each corner and turning up the sides. Find the area of the original square if the box is to contain: A) 16 cubic inches And B) 400 cubic inches

    asked by Nikki on January 30, 2013
  68. AP Physics

    A flywheel turns through 46 rev as it slows from an angular speed of 3.1 rad/s to a stop. Assuming a constant angular acceleration, find the time for it to come to rest? What is its angular acceleration (in rad/s^2) ? How much time is required for it to

    asked by ed on January 27, 2008
  69. maths

    there are two circles touching each other at one point. The radius of bigger circle is 4cm and smaller is 1cm. A small third circle is drawn which touches both the first two circles at one point each. A common tangent passes through all the three

    asked by faizel on December 21, 2012
  70. math

    Doug had scores of 80, 85, 75, and 80 on his first four exams in a course. a. Find the mean, median, and mode for these exam scores. b. Which “average” would Doug want the teacher to use in determining his grade? c. What score would Doug have to get on

    asked by please help on October 11, 2009
  71. math

    In a group of 9 coins, one is fake and weighs slightly more. What is the fewest number of times you need to use a pan balance to find the counterfeit coins? (A pan balance is a scale used to measure weights, where weights are placed in two pans. The

    asked by claudia on January 22, 2012
  72. GED

    Is the English Writing test the most difficult GED test? I find Math easy. Am I required to memorize the Science and Social Studies? or will I be provided information and is the Science and Social Studies actually a reading test? Thank You in Advance.

    asked by Mohammed on October 25, 2013
  73. Math

    One fourth of herd of goats was seen in the forest. Twice the square root of the number of the herd had gone up the hill and the remaining 15 goats were on bank of the river. Find the total number of goats. I got the equation to be x/4 + 2 root x + 15 = x

    asked by Steve on April 27, 2013
  74. algebra

    There are 12 red checkers and three black checkers in a bag. Checkers are selected one at a time, with replacement. each time the color of the checker is recorded, find the probability of selecting a red checker exactly seven times in 10 selections. Show

    asked by Alecia on June 16, 2016
  75. Algebra1 Word Problem HELP#2

    Part A: Explain why the x-coordinates of the points where the graphs of the equations y = 2^x and y = 4^x−2 intersect are the solutions of the equation 2^x = 4^x−2. (4 points) Part B: Make tables to find the solution to 2^x = 4^x−2. Take the integer

    asked by Tony K on July 30, 2017
  76. Mechanics & hydromechanics

    Three forces pulling on a body are in equilibrium. The direction of one is due south, the direction of another is 80 degrees east of north, and the third force acts in the direction of 35 degrees west of north. If the magnitude of southerly force is 38 N,

    asked by joe on January 16, 2013
  77. algebra

    The projected annual sales (in dollars) of a new product are given by the equation S=150,000+3000t, where t is the time in years from 2005. Such an equation is called a trend equation. Find the projected annual sales for 2010. Is S a function of t?

    asked by lieyn on March 2, 2012
  78. Arithmetic Operations

    Find a set of 4 distinct positive integers a,b,c,d such that the smallest positive integer that can not be represented by such expressions involving a,b,c,d (instead of 1,2,3,4) is greater than 22.You can use digits exactly once. You are allowed to reuse

    asked by Parashar on November 3, 2006
  79. Physics

    A circuit consists of a 10 ohm resistor in series with 3 identical batteries each with an emf = 1.0V and internal resistance of 5 ohms. a) find potential difference between the terminals b) potential difference across the 10 ohm resistor c) power

    asked by Joe on March 3, 2016
  80. chemistry

    N2 + 2 O2 ---> 2 NO2. Suppose 31.25 g of N and 44.0 g of oxygen react. A. Calculate the mass of Nitrogen dioxide formed. B. Which reactant is the limiting reactant? C. Calculate the mass of the excess reactant left after the reaction. D. Find the % yield

    asked by Stacy on October 30, 2013
  81. chemistry

    N2 + 2O2 -->2 NO2 Suppose 31.25 g of N and 44.0 G of O react A. Calculate the mass of Nitrogen Dioxide formed. B. Which reactant is the limiting reactant? C. Calculate the mass of the excess reactant left after the reaction. D. Find the % yield if 52.3 g

    asked by Andrew on October 30, 2013
  82. Physics

    Using energy considerations and assuming negligible air resistance, find the speed of a rock just before it hits the water if it is thrown from a bridge 20.2 m above water with an initial speed of 13.4 m/s? (Verify that the speed is independent of the

    asked by Anonymous on March 16, 2016
  83. Maths

    A stone is thrown up at an angle of 30degrees to the horizontal with a speed of 20metres per second from the edge of a cliff 15m above sea level, so that the stone lands in the sea. Find how long the stone is in the air and how far from the base of the

    asked by Viviana on November 22, 2015
  84. statistics

    27. Consider the following hypothesis test. H0: µ = 15 Ha: µ ≠ 15 A sample of 10 gives a sample mean of 8.9 and population variance of 9. Consider the following data drawn from a normally distributed population: 4, 8, 12, 11, 14, 6, 12, 8, 9, 5, α =

    asked by charlie on August 8, 2011
  85. math

    Find the cost of buying 4 dozen of exercise books at sh 6000 per dozen,a half dozen of pencil at sh 2050 per dozen,5 dozen rulers at sh 3600 per dozen #i need anyone to help me please# and in case someone know where i can get such the questions,i am kindly

    asked by kelvin on February 22, 2017
  86. Math

    We have 48$ to spend on soda and chips for a party. A six-pack of soda cost $6 and a bag of chips cost $4. The number of six-packs we can afford, y, is a function of the number of bags of chips we decide to buy,x. Find an equation relating x and y.

    asked by George Carl on January 30, 2018
  87. maths

    A party of bush walkers have an average speed of 50km/minute and walk for 4 hours on a bearing of 231°T. they then walk for 6(1)/(3) hours on a bearing of 117°T. Find a.How far are they from bas e camp? b. The bearing they must travel along to get to

    asked by Tammy on March 15, 2011
  88. geometry

    A flagpole has a height of 10 yards. It will be supported by three cables, each of which is attached to the flagpole at a point 4 yards below the top and attached to the ground at a point that is 8 yards from the base of the pole. Find the total number of

    asked by Betty on November 26, 2013
  89. business calculas

    A cylindrical can is to hold 20 pie mraised to the 3rd power. The material for the top and bottom costs $10/m raised to the 2nd power and material for the side costs $8/m to the 2nd power. Find the radius r and height h of the most economical can.

    asked by tonya on April 5, 2009
  90. physic

    A Carnot engine takes an amount of heat QH = 113 J from a high-temperature reservoir at temperature TH = 1170°C, and exhausts the remaining heat into a low-temperature reservoir at TL = 13.3°C. Find the amount of work that is obtained from this process

    asked by John on May 13, 2011
  91. chemistry

    When 0.451g of biphenyl (C12H10) undergoes combustion in a bomb calorimeter, the temperature rises from 26.7∘C to 29.6∘C.Find ΔErxn for the combustion of biphenyl in kJ/mol biphenyl. The heat capacity of the bomb calorimeter, determined in a separate

    asked by Anonymous on April 6, 2014
  92. Pre-calculus

    Initially 600 milligrams of a radioactive substance was present. After 7 hours the mass had decreased by 3%. Construct an exponential model A(t) = A0ekt for the amount remaining of the decaying substance after t hours. Find the amount remaining after 24

    asked by Kim on November 23, 2015
  93. Emily

    Iddetifying Adverbs, need to find all adverbs in the sentences below some might not have any. 1. There is a big sale at the mall. Is no adverb 2. She fells happy when she finds a real deal. Is no adverb 3. If you want a good deal, stay close to Denicece.

    asked by English on May 12, 2011
  94. linear equation in one variables

    The organisers of an essay competition decide that a winner in the competition gets a prize of Rs 100 and a participant who does not win gets a prize of Rs 25. The total prize money distributed is Rs 3,000. Find the number of winners, if the total number

    asked by sunil on April 8, 2016
  95. Math

    A rectangular flowerpot is 20 inches long 8 inches wide and 6 inches high. true or false if andy fills the flowerpot 2/3 fullof potting soil the expression 2/3(20 + 8 + 6) could be used to find the amount of potting soil he needed

    asked by Lisa on December 5, 2010
  96. Maths - Vectors

    The position vectors a,b,c of the points A,B,C relative to the origin O are ai, bj and ck respectively.Find: 1) a vector equation for the line l throught O which is normal to the plane ABC. 2) a vector equation of the plane ABC The answers should be: 1)

    asked by Claire on February 2, 2009
  97. math

    Jewel uses 1/8 lb of cheese to make a sandwich in the cafeteria where she works.She purchased a 5 lb block of cheese earlier this week and has already used 1 3/4 lb from the block.Which equation could be used to find n, the number of sandwiches that jewel

    asked by thmas on February 20, 2014
  98. Calculus/Optimisation

    An open water tank with a square base is to be made from a thin sheet of metal. find the length of the square base and the height of the tank so that the least amount of metal is used to make a tank of capacity 8 meters cubed

    asked by J. on March 17, 2017
  99. Geometry

    Triangle RSU has two of its points(R and S) on the sides of a circle. Line SU forms a secant ray that passes through the diameter of the circle. Angle S is 30 degrees, the measure of arc RS is 84 degrees, and RU is tangent to the circle at R. Find the

    asked by Paige on May 22, 2012
  100. Algebra ll

    Help me with this please There are 12 red checkers and 3 black checkers in a bag. Checkers are selected one at a time, with replacement. Each time, the color of the checker is recorded. Find the probability of selecting a red checker exactly 7 times in 10

    asked by Me and I on April 24, 2014

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