1. Chemistry

    8-hydroxyquinoline (Q) can complex and precipitate many metals. A mixture of the aluminium and magnesium complexes weighed 1.0843g (MW=459.43; 312.61). When ignited, the mixture decomposed and left a residue of Al203 (MW 101.96) and MgO (MW 40.304)

    asked by David on August 24, 2014
  2. AP CALCULUS!!! HELPP

    related rates: the base of a pyramid-shaped tank is a square with sides of length 12 meters, and the vertex pyramid is 13 meters above the base. the tank is filled to a depth of 5 meters, and water is flowing into the tank at the rate of 2 cubic meters er

    asked by Raven on April 14, 2011
  3. chemistry

    If I contain 3 moles of gas in a container with a volume of 60 liters and at temperature of 400 K, what is the pressure inside the container? Ideal Gas Law: PV=nRT I know I'm given the volume, temperature, and numbers of moles of gas, but how do I know

    asked by kara on May 30, 2015
  4. phy

    a watermelon seed has the following coordinates: x= -5.0, y = 8.0m, and z = 0m. find its position vector (a) in unit-vector notation and as (b) a magnitude and (c) an angle relative to the positive direction of the x axis (d) sketch the vector on the

    asked by stephen on February 9, 2013
  5. physics

    A light of ray is incident at an angle of 58degrees on the plane surface of a block of glass of refractive index 1.60. Some light is reflected on the other side of the normal att he same angle as the angle of incidence. Find: a.the angle between the light

    asked by help on October 24, 2012
  6. AP CALCULUS!! HELPPP URGENT

    related rates: the base of a pyramid-shaped tank is a square with sides of length 12 meters, and the vertex pyramid is 13 meters above the base. the tank is filled to a depth of 5 meters, and water is flowing into the tank at the rate of 2 cubic meters er

    asked by Raven on April 15, 2011
  7. Physics

    The density of a 5.0-m long rod can be described by the linear density function λ(x) = 140 g/m + 14.8x g/m2. One end of the rod is positioned at x = 0 and the other at x = 5 m. (a) Determine the total mass of the rod. (b) Determine the center-of-mass

    asked by James on June 11, 2012
  8. Chemistry

    The standard internal energy change for a reaction can be symbolized as ΔU°rxn or ΔE°rxn. For the following reaction equations, calculate the energy change of the reaction at 25 °C and 1.00 bar. Sn(s) + 2Cl2(g) --> SnCl4(l) ΔH°rxn = -511.3 kJ/mol

    asked by Anonymous on September 21, 2013
  9. Math

    Information about 3 Indian & 3 foreign mathematicians. You'll find information about dozens of mathematicians -- from India and other places in the world -- in these sites. http://www-groups.dcs.st-and.ac.uk/~history/BirthplaceMaps/Countries/India.html

    asked by M Sandhya on May 12, 2007
  10. English Literature

    I need help with "THe Noisless Flash" from herishoma written by john hersey. I have a project and my job is to fina and record two objective details from the character Reverend Tanimoto's account. Then, change those details to subjective ones. Next, find

    asked by Sally on February 17, 2012
  11. Number operations/math

    Bill is selling funnel cakes at the county fair. After lunch, he has 2/3 of his original funnel cakes remaining. That evening, when the fair closes, he determines he sold 5/8 of the reaming funnel cakes. What expression can be used to find the fraction of

    asked by Alia on December 22, 2011
  12. Physics

    A watermelon seed has the following coordinates: x = -8.7 m, y = 1.6 m, and z = 0 m. Find its position vector as (a) a magnitude and (b) an angle relative to the positive direction of the x axis. If the seed is moved to the xyz coordinates ( 3.4 m, 0 m, 0

    asked by Kelly on February 2, 2015
  13. british english

    I have to find out what this part of a story is about. 1) don't know where professor got it 2)I think it might pertain to Victorian era: They measured each other with the eye. to her he was a spidery thing against the velvet blackness and hard silver

    asked by elda on April 24, 2007
  14. Genetics part b only

    You are studying genetics in domestic chickens (Gallus gallus) and you find a mutant with no wings. Assume that the mutant wingless phenotype is due to a mutation at a single gene. In contrast to mammals, chickens use ZZ/ZW sex-linkage. That is, male

    asked by grad2013 on April 2, 2013
  15. Stats

    In the game Roulette, a ball spins on a circular wheel that is divided into 38 arcs of equal lenght, numbered 00, 0, 1, 2, ... , 35, 36. The number on the arc on which the ball stops is the outcome of one play of the game. The numbers are also colored as

    asked by tom on July 13, 2017
  16. graphing question

    Write the equation of the line with slope 4 and y-intercept (0, –5). Then graph the line i wrote the equation which i think is y=4x-5 i point the y intercept (0,-5) in the graph how do i find the other point would the 4x become 4/1 x y=4/1x-5 then move

    asked by linda on April 13, 2007
  17. physic

    1)a pitched ball is hit by a batter at a 45 degree angle and just clears the outfield fence,98m away. assume that the fence is at the same height as the pitch and find the velocity of the ball when it left the bat. 2)an arrow is shot at 30.0 degree above

    asked by jamie on November 11, 2007
  18. Algebra 2

    Dante is making a necklace with 18 rows of tiny beads in which the number of beads per row is given by the series 3+10+17+24+... a. If you were to write this series in summation notation, give i. the lower limit of the sum ii. the upper limit of the sum

    asked by T on May 6, 2019
  19. vectors/work

    . In many applications a bolt is required to be tightened to a specific moment (torque), this is measured with a torque wrench. A bolt is located at the origin and is rotated so that the axis of rotation should be the z axis. A 0.5 m wrench is attached to

    asked by Mason on April 25, 2017
  20. math

    In the year 2003, the population of a certain district was 1.8 million. Thirty percent of the population was in the age group 15-40 years. In the same year, 120,000 people in the district the Voluntary Counseling and Testing (VCT) contra for an HIV test.

    asked by kudu on March 15, 2015
  21. math

    using this information: if an object is thrown straight up into the air from the height H feet per second then at time tseconds the height of the object is -16.1t^2 +Vt+ H feet. This formula uses only gravitational force, ignoring air friction. It is valid

    asked by deana on February 10, 2012
  22. math

    The equation P=240I-8I^2 represents the power, P, (in watts) of a 240 volt circuit with a resistance of 8 ohms when a current of I amperes is passing through the circuit. Find the maximum power (in watts)that can be delivered in this circuit. I had posted

    asked by Shirley on February 23, 2008
  23. 12th Grade Physics

    Q. a 2.0 kg block is placed against a spring of force constant 800 N/m, which has been compressed 0.15m. The spring is released, and the block moves 1.2m along a horizontal surface with a coefficient of friction of 0.19. The block then slides up the

    asked by Ring on October 14, 2008
  24. math

    using this information: if an object is thrown straight up into the air from the height H feet per second then at time tseconds the height of the object is -16.1t^2 +Vt+ H feet. This formula uses only gravitational force, ignoring air friction. It is valid

    asked by deana on February 10, 2012
  25. physics

    The acceleration due to gravity near a planet's surface is known to be 3.20 . Part A If the escape speed from the planet is 9.54 , determine its radius. Part B Find the mass of the planet. Part C If a probe is launched from its surface with a speed twice

    asked by sammy on September 29, 2012
  26. Fashion

    Does anyone know where i can find pictures of old clothing brands from the 90's? Especially Eclipse Jeans, Spliffy Jeans, Naf Naf co 54, Paco sweaters, Kickers shoes and sweaters, Fido Dido shorts etc... anymore pics of any more brands would be amazing!

    asked by Krystal on February 28, 2007
  27. math. can someone explain this!

    using this information: if an object is thrown straight up into the air from the height H feet per second then at time tseconds the height of the object is -16.1t^2 +Vt+ H feet. This formula uses only gravitational force, ignoring air friction. It is valid

    asked by deana on February 10, 2012
  28. math

    Mia is stacking copies of a new book in a square-pyramid display by the front window of her bookstore. for each consecutive layer, she places one book where four meet. A. I the bottom row of the display has 144 books and there is one book on the top,

    asked by Vivian on March 14, 2012
  29. math

    In the year 2003, the population of a certain district was 1.8 million. Thirty percent of the population was in the age group 15-40 years. In the same year, 120,000 people in the district the Voluntary Counseling and Testing (VCT) contra for an HIV test.

    asked by kudu on March 16, 2015
  30. math

    You have just opened a new nightclub, Russ' Techno Pitstop, but are unsure of how high to set the cover charge (entrance fee). One week you charged $9 per guest and averaged 160 guests per night. The next week you charged $11 per guest and averaged 140

    asked by Bud on August 27, 2012
  31. psychology

    Kevin hates his job,his girl friend dropped him, and he had a hedeache this morning from staying uo too late eating hamburgers and drinking beer by himself.He has decided to initiate a new attack today and take control of his life.He will find new

    asked by vedrana on November 17, 2011
  32. geometry

    Angles BAC and Angle CAD are supplementary angles. Find the measures of each angle if the measure of Angle BAC is 10x + 16 and the measure of Angle CAD is 7x + 8. Round angle measures to the nearest tenth

    asked by marley on October 3, 2011
  33. Statistics

    In a village with a population of 1500,the probability of a person falling sick is 0.002. Find the probability that a)3people fall sick in a week b)less than 3 fall sick in a week c)at most 3 fall sick in a week d)more than 2 fall sick in a week

    asked by Auma Stephen Onyango on January 20, 2018
  34. geometry

    Given a triangle the middle size angle measures 8 degrees more than twice the smaller angle. The middle size angle measures 44 degrees less than the sum of the smallest and largest angle. Find the measure of each angle of the triangle.

    asked by Kier on April 30, 2012
  35. MATH

    in a contest, Bello. Adamu, and Lawi are asked to solve a mathematical problem. the probability that they solve the problem correctly are 1/5, 2/3, and 2/5. find the probability that:(1)None of them solve the problem correctly(2)At least one of them solve

    asked by biliyaminu on January 13, 2016
  36. Math

    The earth takes 365 1/4 days to go around the sun. Mercury takes 3 days less than 1/4 of this time. How many days does Mercury take to go around the sun? I believe I would have to find 1/4 of the 365 1/4 days then take 3 days out. I was given this do as

    asked by Arianna on July 19, 2016
  37. french

    please can you help me find the translations on the agenda = 2 words first one begins with a to eat = 2 words first one begins with s i think it might be 'se manger' to spend on = 2 words first one begins with c to remember = 2 words first one with s i

    asked by kiko on September 20, 2009
  38. Math - Trigonometry

    Let f(x) be a polynomial such that f(cos theta) = cos(4 theta) for all \theta. Find f(x). (This is essentially the same as finding cos(4 theta) in terms of cos theta; we structure the problem this way so that you can answer as a polynomial. Be sure to

    asked by Sam on November 6, 2013
  39. Chemistry

    Tap water that contains Cl− at a concentration of 50 ppm is used to prepare a 0.100 mol/L AgNO3 solution. Does a precipitate form? How much? I don't know how to find out how much precipitate will form but a precipitate will form based on my calculations

    asked by Rez on May 31, 2015
  40. calc check: average value

    Find the average value of the function "f(x) = x^2 sqrt(1+x^3)" on the interval [0,2]. and this is what i did.. please check for mistakes. thanks :D f(x) = x^2 sqrt(1+x^3), [0,2] f ave = (1/(b-a))*inegral of a to b for: f(x) dx f ave = (1/(2-0))*integral

    asked by COFFEE on June 30, 2007
  41. algebra

    A. The speed of train A is 6mph slower than the speed of train B. Train A travels 220 miles in the same time it takes for train B to travel 250 miles find the speed of each train solve and check: q+9/3 + 9-4/4 = 13/3 simplify by removing factors of 1 :

    asked by Anonymous on November 21, 2010
  42. AED

    I need help bad with the following Use at least three sources—other than the text for this course—to support your plan. Construct either a 1,050- to 1,400-word paper or a 15- to 20-slide Microsoft® PowerPoint® presentation (with presenter’s notes),

    asked by troyer0269 on February 15, 2009
  43. Social Studies

    I have read the chapter concerning this subject several times in my text book and cannot find the answer for my study page. Please assist. Mercantilism encouraged economic polic makers to: A. Develop national monopolies over trade and resources B.

    asked by Keith on August 10, 2007
  44. poetry

    ok so im supposed to create a poem about child abuse...and i have some good ones but i totally just got writers block and i need help..here is part of the poem, any suggestions MY PAIN it started with a pen and paper... i write my emotions without thinking

    asked by symantha on December 2, 2008
  45. Math

    A bag contains 5 red marbles, 3 green, 1 lavender, 3 yellow, 2 Orange. Q. How many sets of four marbles include none of the red ones? First I computed C(14,4) to find out how many sets of 4 could be formed. Total # sets =1001. Then I subtracted the number

    asked by Gilberto on April 6, 2016
  46. Physics

    I'm stuck on this problem. "You mix 100 ml 60 degree C water with 100ml 20 degree C water. Find the final temperature" Changing 100 ml to .1kg, I set .1*4186*(60-final temp.) + .1*4186*(final temp-20)=0 but my t's cancel out. I know it would work if I set

    asked by Brigid on April 28, 2009
  47. math

    if someone could please help that would be muchly appreciated. A group of mountain climbers are using trigonometry to find the height of a mountain located in the rockies. From point A, which is due west of the mountain, the angle of elevation to the top

    asked by deborah on April 3, 2010
  48. Child Development

    Please Check my answers 1. A type of communication that isn't only about the present and that promotes higher level thinking such as planning and reminiscing is called A. child-child conversation. B. chanting. C. early production. D. decontextualized talk.

    asked by Danielle on December 8, 2014
  49. Calculus

    1. Suppose that the outdoor temperature (in Fahrenheit) on a particular day was approximated by the function T(t) = 50 + 14sin[(pi(t))/12] Where t is time in hours after 9 AM. a) find the max (Tmax) and min (Tmin) temperature, And the average temperature:

    asked by Anonymous on September 18, 2018
  50. math

    1.During the soccer season, Michelle attempted 130 goals and made about 70% of them. a. How many goals did Michelle make? b. The team made a total of 456 goals. What percent of the teams made goals did Michelle make? 1. 13 goals; 2.85% 2. 39 goals; 85.5%

    asked by :) on December 18, 2014
  51. physics

    A rectangle has a length of 2d and a height of d. Each of the following three charges is located at a corner of the rectangle: +q1 (upper left corner), +q2 (lower right corner), and -q (lower left corner). The net electric field at the (empty) upper right

    asked by Daniel on February 22, 2012
  52. physics

    There is a block on top of an incline plane. The incline is going down to the right. The angle to the right of the 90 is 36.9 degree. There is a force pushing on it from the left. Find the applied force (F) needed to prevent the block from sliding down the

    asked by k9 on June 26, 2011
  53. physics

    Two wooden crates with masses are as shown are tied together by a horizontal cord. Another cord is tied to the first crate and it is pulled with a force of 199N at a angle of 20.0 degrees. Each crate has a coefficient of kinetic friction of 0.55 . Find the

    asked by Ashley on October 27, 2011
  54. Calculus

    The speed of a runner increased steadily during the first three seconds of a race. Her speed at half-second intervals is given in the table below. Find lower and upper estimates of the distance she covered during the first three seconds of the race. Use

    asked by Anonymous on April 11, 2013
  55. English

    A lot of students find English Language a difficult language to learn. Can you think of the reasons or causes of their difficulties in understanding English and can you also write the results or effects of these difficulties on their educational and

    asked by Imran on October 4, 2008
  56. Math

    The Lions Gate bridge in Vancouver is a suspension bridge. The main span between the two towers, is 427m long. Large cables are attached to the ends of the both towers, 50m above the road. Each large cable forms a parabola. The road is suspended from the

    asked by Hamza on October 6, 2012
  57. PROBABILITY MATH HELP!!!!!

    A die is rolled. Find the probability of the given event. (a) The number showing is a 5; The probability is? (b) The number showing is an even number; The probability is ? (c) The number showing is greater than 5; The probability is?

    asked by Sarah on September 30, 2016
  58. Math

    At a local deli, two beef sandwiches and a chicken sandwich cost 12.25. Three beef and two chicken sandwiches cost $20. Find the cost of each sandwich.

    asked by Henry P on May 27, 2012
  59. algerbra

    find the slope of any line perpendicular to the line through points (0,5) and (-3,-4) would I be right y=-1/12 No. What is the slope of the line through those points? 9/3 ?What is the negative reciprocal of that? -9/-3? Goodness, 9/3 is 3. What is the

    asked by patti on May 31, 2007
  60. math

    The ratio of zinc and copper in an alloy is seven ratio nine if weight of copper in the alloy is eleven point kg then find the weight of zinc in the alloy

    asked by nisha on January 2, 2013
  61. Math

    David and Sam had an equal number of marbles. After Sam gave 50 marbles to David, he had 5x as many marbles as Sam. Find the total number of marbles they had.

    asked by Patrice on January 20, 2016
  62. Math

    A square has an area of 27 square units. If the perimeter of the square is equal to the perimeter of an equilateral triangle, find the area of the equilateral triangle.

    asked by Arch on August 12, 2013
  63. Math

    The larger of two numbers is 1 less than 3 times the smaller number. If twice the smaller number is increased by the larger number, the result is 18 more than the larger number.Find both numbers

    asked by Omer on August 29, 2016
  64. math

    Beaker A,B and C contain water with a total volume of 1 litre.Beaker B has 125 millilitres less water than beaker A. Beaker B has twice as much water than Beaker C.Find the volume of water in beaker B.

    asked by harry on September 3, 2015
  65. Chemistry

    If an element N has isotopic abundances X% of mass number 12, atomic number 6, and Y% of N of mass number 13, atomic number 6. If their relative isotopic mass is 12.35. Find X and Y.

    asked by Adigun on January 31, 2014
  66. algebra

    To find the area of a triangle, you can use the expression b times h divided by 2, where b is the base of the triangle and h its height. what is the area of a triangle with a base of 6 and a height of 8? the area of the triangle is?

    asked by lei on February 8, 2017
  67. Math

    Manyatta Village is 74 km North West of Nyangata Village. Chamwe village is 42 km west of Nyangata. find the bearing of Chamwe from Manyatta

    asked by kudu on March 26, 2015
  68. Chemistry

    If an element N has isotopic abundances X% of mass number 12, atomic number 6, and Y% of N of mass number 13, atomic number 6. If their relative isotopic mass is 12.35. Find X and Y.

    asked by Adigun on January 31, 2014
  69. math

    40% of the 25 students in the class are boys. Write 40% as a fraction? Then find the ratio of girls to boys in the class. 10 of the students are boys the ratio would be 10:15? would 40% as a fraction be 4/10??

    asked by Jill on November 7, 2010
  70. History

    Who are israel's 3 most important musicians. I can't find this answer anywhere, I've had to look at almost every website. Try these sites. your word "important" musicians is ambigous. http://en.wikipedia.org/wiki/List_of_Israeli_musical_artists

    asked by Blaine on December 16, 2006
  71. algebra

    In 2018, the number of people employed as registered nurses in the U.S. is expected to be 3,200,000. This represents a 22% increase over the number of people employed as registered nurses in 2008. Find the number of registered nurses employed in 2008.

    asked by jaimecarlon on May 9, 2015
  72. Calculus

    Find the values of x that give relative extrema for the function f(x)=3x^5-5x^3 A. Relative maximum: x= 1; Relative minimum: x=sqrt(5/3) B. Relative maximum: x=-1; Relative minimum: x=1 C. Relative maxima: x=+or- 1; Relative minimum: x=0 D. Relative

    asked by Anonymous on January 11, 2015
  73. Chemistry

    Suppose that 0.483 g of an unknown monoprotic weak acid, HA, is dissolved in water. Titration of the solution with 0.250 M NaOH(aq) required 42.0 mL to reach the stoichiometric point. After the addition of 21.0 mL, the pH of the solution was found to be

    asked by Val on March 12, 2010
  74. ela

    can you proof read for me PLEASE Seventeen year old boy, Alex is the main character of novel. Alex comes from school and find out his father in study. He saw his father talking on phone. His father Ted Jackson,is a cameraman of Canadian Broadcasting

    asked by anu on January 11, 2010
  75. pyhsics

    So I already got the answer for the first part: An airplane is flying in a horizontal circle at a speed of 102 m/s. The 80.0 kg pilot does not want the centripetal acceleration to exceed 6.18 times free-fall acceleration. Find the minimum radius of the

    asked by julie on November 19, 2012
  76. English

    I forgot to include this part. Thank you. 1) The principal of my school has asked me to find an Irish school which would be interested in a Comenius partnership with our school, a French high school and a German high school. 2) The project will be mainly

    asked by Henry2 on January 12, 2012
  77. HELP ASAP BIO EXAM TOMRROW

    what is the purpose of step 5 in glycolysis. Can pyrutate be made without the enzyme that catalyzes step 5? In this step(5), two main events take place: 1) glyceraldehyde-3-phosphate is oxidized by the coenzyme nicotinamide adenine dinucleotide (NAD); 2)

    asked by cubanita on March 29, 2009
  78. physics

    So I already got the answer for the first part: An airplane is flying in a horizontal circle at a speed of 102 m/s. The 80.0 kg pilot does not want the centripetal acceleration to exceed 6.18 times free-fall acceleration. Find the minimum radius of the

    asked by julie on November 19, 2012
  79. fish tank;; deals with volume. :]

    A cylinder shaped fish talk is 40cm high and has a radius of 12cm. The tank with be layed with a decorative gravel on the bottom. The blue layer will be 2 cm high. The yellow layer will be 3 cm high. And the green layter will be 2cm high. [assume water

    asked by blah. volume... on October 28, 2007
  80. physics

    One end of a cord is fixed and a small 0.300 kg object is attached to the other end, where it swings in a section of a vertical circle of radius 2.50 m as shown in the figure below. When è = 15.0°, the speed of the object is 6.20 m/s. At this instant,

    asked by carlton on October 25, 2011
  81. maths

    if the arithmetic mean of four numbers is 20 and the arithmetic mean of other six numbers is 10 then,find the arithmetic mean of all the numbers taken as one group

    asked by john on March 30, 2017
  82. physics steve or damon help!!!!

    SIG FIGS. how many sig figs in 6:70. hOW TO FIND SIG FIGS IN TIMe.

    asked by brahtherfrmanothermather on September 25, 2016
  83. calculus

    Find the limit if it exists. The limit of (sqrt(x+1)-2)/(x-3) as x tends to 3. The limit of (sqrt(x+5)-sqrt(5))/x as x tends to 0

    asked by Anna on September 12, 2010
  84. AP World History

    Well we are doing a project on empire building and we had to answer a couple of questions. I looked all over the internet and I can't find answers to these four questions. this is due tomorrow so I'm really desperate. Can someone help me out? My empire is

    asked by Alice on January 11, 2009
  85. physics

    A mass m = 9.0 kg is attached to the lower end of a massless string of length L = 83.0 cm. The upper end of the string is held fixed. Suppose that the mass moves in a circle at constant speed, and that the string makes an angle theta = 21 with the

    asked by sam on July 3, 2015
  86. physics-E&M

    An infinite line charge of uniform linear charge density lambda = -2.5 micro Coulombs lies parallel to the y axis at x = 0 m. A point charge of 3.5 micro Coulombs is located at x = 2.5 m, y = 3.5 m. Find the x- and y-components of the electric field at x =

    asked by aaron b. on January 27, 2012
  87. Physics

    One cubic meter (1.00 m^3) of aluminum has a mass of 2.70 multiplied by 10^3 kg, and the same volume of iron has a mass of 7.86 multiplied by 10^3 kg. Find the radius of a solid aluminum sphere that will balance a solid iron sphere of radius 1.40 cm on an

    asked by Z32 on August 27, 2010
  88. calculus

    Given f(x)= (2x^2 −5x+2) / ( 3x^2 −10x+3) a. find the derivative f
′
(x)
, b. determine the open intervals of increase of f(x)
 c. determine the open intervals of decrease of f(x)
 d. determine the local maximum. Give your answer as (x,y)

    asked by baby on October 6, 2010
  89. Math--Calculus

    Let y = f(x) be the continuous function that satisfies the equation x^4 - (5x^2)(y^2) + 4y^4 = 0 and whose graph contains the points (2,1) and (2,2). Let L be the line tangent to the graph of f at x = 2. (a) Find and expression for y'. (b) Write an

    asked by Sophee on November 12, 2007
  90. Geometry

    find the radius of a sphere withh the given property. A.The number of square meters of a surface area equals the number of cubic meters of volume. B. The ratio of surface area in square meters to volume in cubic meters is 1:5.

    asked by George on September 29, 2013
  91. dma 040

    Sports competition, France won more medals than Italy who won more medals than Korea. The total number of medals won by three countries is three consecutive integers who sum is 37, find the number of medals won by each France Italy Korea

    asked by Anonymous on September 15, 2013
  92. algebra

    A motorboat traveling a distance of 225 miles in 5 hours while traveling with the current. Against the current, the same trip took 9 hours. Find the rate of the boat in calm water and the rate of the current. rate of boat mph rate of current mph

    asked by Jer on November 23, 2014
  93. Physics

    A pilot wants to bomb his target on the ground. If the angle of the plane from the horizontal is 20° and the velocity of the plane is 80 m/s , find A). The distance that the pilot must release the bomb to his target B) the time before the bomb hits the

    asked by Harrieth on February 18, 2017
  94. calculus

    A conical tank( with vertex down) is 10 feet across the top and 18 feet deep. As the water flows into the tank, the change is the radius of the water at a rate of 2 feet per minute, find the rate of change of the volume of the water when the radius of the

    asked by sara on October 17, 2007
  95. math

    During the playoffs you score 2 goals per game. By the end of the second playoff game you had 22 goals for the year. Find an equation that gives you the total number of goals scored for the year in terms of the number of playoff games. How many goals did

    asked by Michaela on November 6, 2012
  96. statistics

    A jar contains 7 red balls, 5 green balls, 4 blue balls, and 3 white balls. A sample of size 7 balls is selected at random without replacement . Find t the probability that sample contains two red balls, 2 green balls, 2 blue balls, and 1 white ball.

    asked by kp on December 26, 2014
  97. MATH

    A(2,1) , B(4,3) and C(3,5) are the vertices of a triangle ABC. If r1 represents the reflection in X axis and r2 represents the reflection in the line x=5, find the image of triangle ABC under combined transformation r2 o r1. Should we perform r2 first or

    asked by clive on January 26, 2016
  98. Algebra

    A tree is 38.5 feet tall casts a shadow that is 9 feet 4 inches long.A utility pole beside the tree casts a shadow that is sixty-four inches long.Find the height of the utility pole. Show work

    asked by Sirena on October 18, 2014
  99. Physics

    The active element of a certain laser is an ordinary glass rod 19.5 cm long and 1.04 cm in diameter. If the temperature of the rod increases by 77.3°C, calculate its increase in length.Calculate its increase in volume. Calculate its increase in diameter.

    asked by Ashley on November 17, 2016
  100. Pre-Algebra

    If the perimeter of a rectangle is 38 ft and the width is 9 ft, find its length. [Hint: The perimeter of a rectangle is given by P = 2L + 2W.] I don't know why this is a problem for you. P = 38 and W = 9. Solve for L. You have only one unknown in the

    asked by Tammy Evert on July 16, 2006

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