1. pre calculus

    Question 1: Explain why the equation of the line y=5 has a slope that is undefined. Explain in words or mathematically. Question 2: Given any circle, the coordinates of one endpoint of a diameter is (3,-2). If the coordinates of the center are (2,-4), find

    asked by maxine on May 14, 2009
  2. Math

    To travel 88 miles, it takes Sue, riding a moped, 4 hours less time than it takes Doreen to travel 72 miles riding a bicycle. Sue travels 13 miles per hour faster than Doreen. Find the times and rates of both girls. Doreen _ mph for _ hr Sue _ mph for _ hr

    asked by John on October 3, 2017
  3. Algebra

    The Kinetic energy (k)of a moving object varies jointly with it mass (m) and the square of its velocity (v).If an object has a mass of 22.5 kilograms and moving with a velocity of 20 meters per second has a kinetic energy of 4500 joules, find it kinetic

    asked by rosa on May 21, 2010
  4. physics

    the total electric field e consists of the vector sum of two parts. one part has a magnitude of e1 = 1284 n/c and points at an angle θ1 = 30° above the +x axis. the other part has a magnitude of e2 = 1833 n/c and points at an angle θ2 = 62° above the

    asked by katie on January 31, 2014
  5. Physics

    A wooden block of mass 9 kg is at rest on an inclined plane sloped at an angle theta from the horizontal. The block is located 5 m from the bottom of the plane. A) Find the frictional force for theta = 20 B)If the angle is increased slowly the block starts

    asked by Olivia on September 28, 2016
  6. Physics

    A 0.9-kg block (mass m) and a second block (mass M) are both initially at rest on a frictionless inclined plane. Mass M rests against a spring that has a force constant of 12.2 kN/m. The distance d along the plane between the two blocks is 3.64 m. The

    asked by Anonymous on November 9, 2014
  7. Differential equations

    Suppose a cup of coffee is at 100 degrees Celsius at time t = 0, it is at 70 degrees at t = 10 minutes, and it is at 50 degrees at t = 20 minutes. Compute the ambient temperature. So in the book I was given Newton's Heat equation. dT/dt=k(A-T) where T is

    asked by Maddie on April 13, 2018
  8. Chemistry

    In chemistry lab we did an experiment trying to find the empirical formula of an oxide and tin. The question is "suppose some of the oxide splattered out of the crucible. How would this affect your calculated ratio of the number of moles of oxygen to the

    asked by Bee on November 3, 2010
  9. physics

    Two students are on a balcony 18.3 m above the street. One student throws a ball (ball 1) vertically downward at 12.2 m/s; at the same instant, the other student throws a ball (ball 2) vertically upward at the same speed. The second ball just misses the

    asked by B on August 29, 2011
  10. Math (geometry)

    A diagonal of one cube is 2 cm. A diagonal of another cube is 4*sqrt3 cm. The larger cube has volume 64 cubic cm. Find the volume of the smaller cube. --------------------------------------------------------------------------------------------------- There

    asked by Emily on April 3, 2008
  11. Chemistry

    The question reads, "A spaceship is found to have a tiny leak that allows the effusion of air into space. Air in the spaceship is a mixture of nitrogen (N2), oxygen (O2), argon (Ar), and trace amounts of other gases. Predict how the percentages of the

    asked by SarahF275 on December 15, 2017
  12. Calculus

    Find the equation of the tangent plane at the given point. 1)x^2+y^2-z=1 at the point (1,3,9) 2)x^2*y^2+z-40=0 at x=2, y=3 3) x^2+ln(xy)+z=6 at point (4,0.25,2) For the first one I got the partial fraction in terms of x, y and z and my final answer was

    asked by Alicia on October 4, 2012
  13. French-Simple question

    Im trying to find out what each person is studying. Every person in my text has a bubble over their heads, and in that bubble is a picture such as...one person had a bubble picture of a microscope over their heads, so that would mean that they are studing

    asked by Anna on February 16, 2011
  14. algebra 1

    Jaun drives to work. he averages 22mph, he returnes home averaging 32mph. total travel time is 2.25 hours. a. define a variable for the time Jaun takes to travel to work. write an exprension for the time it takes to return home. b. write and solve an

    asked by skot on September 17, 2007
  15. Algebra

    Could someone point me in the right direction I think I got it if it is m=y2-y1 over x2-x1. Examine the rise in gasoline prices from 1997 to 2006. The price of regular unleaded gasoline in January 1997 was $1.26 and in January 2006 the price of regular

    asked by Anonymous on June 18, 2008
  16. economics

    How do you calculate economic profit without knowing the quantity? Here is the information included in the question I'm trying to answer regarding finding the economic profit. price - $8.50 current output - 100 units ATC at current output - $9.00 AVC at

    asked by kailee on December 3, 2014
  17. physics

    Two students are on a balcony 18.3 m above the street. One student throws a ball (ball 1) vertically downward at 12.2 m/s; at the same instant, the other student throws a ball (ball 2) vertically upward at the same speed. The second ball just misses the

    asked by B on August 29, 2011
  18. Chemistry

    An archeological artifact was subjected to radiocarbon dating. The artifact showed a carbon-14 decay rate of 13.8 disintegrations/ min per gram of carbon. Carbon-14 has a half-life of 5715 years, and currently living organisms decay at the rate of 15.3

    asked by Rachel on December 5, 2014
  19. College Math

    farmer wishes to fence a rectangular area along the river bank. No fence is required on the side adjacent to the river. The material for the fence costs P16.00 per meter for the side parallel to the river, P12.00 per meter for the side perpendicular to the

    asked by J on August 25, 2010
  20. physics??

    Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 41.3 km/s and 52.7 km/s. The slower planet's orbital period is 7.74 years. (a) What is the mass of the

    asked by Gina on February 15, 2011
  21. area of a rectangle, i think?

    Okay, so Spot the dog is on a 10 foot leash. The leash is attatched to the CENTER of a 24ft by 8ft rectangular shed. So basically, imagine a 24 by 8 rectangle, with a leash attatched to the CENTER of the 24in side. K? - I NEED TO ANSWER THESE 2 QUESTIONS

    asked by sarah on December 2, 2007
  22. statistics

    Simple question I may be over thinking 30. Gift Baskets: The Gift Basket Sore had the following premade gift baskets containing the following combinations in stock. cookies mugs candy -------------------------------------- coffee 20 13 10 tea 12 10 12

    asked by Anonymous on February 20, 2014
  23. Math

    At the regional swim meet the swimmer with the fastest time finished in 2 5/6 minutes. The last place finisher has a time of 4 2/3 minutes. What was the difference in minutes between the first and last place? A.2 1/6 B.1 5/6 C.2 1/5 D.1 1/6 B? Farmer Brown

    asked by Jerald on November 10, 2012
  24. physics

    A ball on the end of a string is whirled around in a horizontal circle of radius 0.22 m. The plane of the circle is 1.69 m above the ground. The string breaks and the ball lands 2.68 m away from the point on the ground directly beneath the ball’s

    asked by squires on September 9, 2011
  25. Dine

    Men spend an average of 29 minutes per day on weekends and holidays exercising and playing sports. They spend an average of 23 minutes per day reading. A random sample of 25 men resulted in a mean of 35 minutes exercising with a standard deviation of 6.9

    asked by angie on November 10, 2014
  26. MATH

    In a study 42% of adults questioned reported that their health was excellent. A researcher wishes to study the health people living close to a nuclear power plant. Among 13 adults randomly selected from this area, only 3 reported that their health was

    asked by M on October 30, 2012
  27. Science

    Which procedure is the best way to find the correct mass of an object in a laboratory experiment? 1)make sure the balance works correctly before starting the measurement. Record the mass for three trials. Then average the masses. 2)Readjust the balance

    asked by Nicole on October 17, 2013
  28. Algebra

    I am in need of some help with the following problem; Examine the rise in gasoline prices from 1997 to 2006. The price of regular unleaded gasoline in January 1997 was $1.26 and in January 2006 the price of regular unleaded gasoline was $2.31 (Bureau of

    asked by Anonymous on June 18, 2008
  29. Algebra2?????

    What would be the missing piece of information given the following information: Find the equation of the line that passes through the points (3, -1) and (2, 5). y = -6x + ? 17 15 20 11 Good. Try this one just like we did the last one...let me know how you

    asked by Margie on October 14, 2006
  30. AP Physics Springs - very confusing question

    This is part of a lab with a mass attached to a spring, and the mass attached is of unknown weight. Which of the following can you measure to find one of the unknown masses? You can select more than one. a) the distance the mass stretches the spring b) the

    asked by Tyger2020 on September 4, 2017
  31. physics

    A downhill skier crosses the finishing line at a speed of 30 1 ms − and immediately starts to decelerate at 10 m s − 2 . There is a barrier 50 metres beyond the finishing line. (a) Find an expression for the skier’s speed when she is V metres beyond

    asked by Triana on July 24, 2014
  32. Physics

    On a drive from your home to town, you wish to average 44 mph. The distance from your home to town is 106 miles. However, at 53 miles (half way), you find you have averaged only 33 mph. What average speed must you maintain in the remaining distance in

    asked by Joe on August 20, 2015
  33. physics - sound level

    The source of a sound wave has a power of 2.50 µW. Assume it is a point source. (a) What is the intensity 6.70 m away? I used I = Power / 4*pi*r^2 and found I to be 4.43x10^-9 W/m^2 (b) What is the sound level at that distance? Sound level = 10 dB*log

    asked by COFFEE on April 21, 2007
  34. algebra

    1. a chemical compound requires 8 ounces of chemical a and 12 ounces of chemical b. a mixture contains 24 ounces of chemical a and 30 ounces of chemical b. how can you fix the mixture to make the chemical compound? 2. in an animal shelter, the ratio of

    asked by leya on April 17, 2015
  35. Physics

    On a drive from your home to town, you wish to average 52 mph. The distance from your home to town is 108 miles. However, at 54 miles (half way), you find you have averaged only 39 mph. What average speed must you maintain in the remaining distance in

    asked by Karen on September 9, 2015
  36. Calculus

    The power P (in W) generated by a particular windmill is given by P = .015 V^3 where V is the velocity of the wind (in mph). Find the instantaneous rate of change of power with respect to velocity when the velocity is 5.7 mph. P = 0.015 V^3 dP/dV = 0.045

    asked by Anonymous on February 13, 2007
  37. Math

    The length of a rectangle is 5 inches less than 3 times the width. The perimeter of the rectangle is 14 inches. Find the length and width of the rectangle. I did this: Length 3x-5; width 3x Then I did guess and check and came up with X=2 solving the

    asked by Katie on December 5, 2015
  38. Physics

    A particle undergoes three displacements. The first has a magnitude of 15 m and makes an angle of 30 degrees with the positive x axis. The second has a magnitude of 8.6 m and makes an angle of 149 degrees with the positive x axis. After the third

    asked by Preston on February 5, 2013
  39. Math

    One summer, Jared earned $26 each time he mowed the lawn. He mowed the lawn a total of 13 times that summer. He had to fix his lawn mower one time during the summer, which cost him $32.42. Which number sentence could be used to find M, Jared's profit for

    asked by Thomas on March 13, 2011
  40. physics

    On a drive from your home to town, you wish to average 52 mph. The distance from your home to town is 106 miles. However, at 53 miles (half way), you find you have averaged only 39 mph. What average speed must you maintain in the remaining distance in

    asked by amanda and leah on August 9, 2012
  41. Math

    during a match, pat kicks a football onto the roof of the stand. The stand and the path of the ball are at righ angles to each other. The path of the ball is given by y=2.5x-x^2÷15 The roof of the stand is given by y=x÷2+48 ÷5, where 18

    asked by Ellie on November 13, 2012
  42. algebra

    Driving down a mountain, Tom finds that he has descended 1800 ft in elevation by the time he is 3.25 mi horizontally away from the top of the mountain. Find the slope of his descent to the nearest hundredth. I put the numbers into the equation like:

    asked by Lindz on July 26, 2007
  43. Statistics

    Total plasma volume is important in determining the required plasma component in blood replacement theory for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that sample of some

    asked by Desperate on July 7, 2012
  44. chemistry

    N2(g) + 3 F2(g) → 2 NF3(g) ΔH° = –264 kJ/mol ΔS° = –278 J/(mol∙K) a. calculate the maximum amount of non-PΔV work that can be accomplished through this reaction at a temperature of 500°C. b. Determine the temperature at which the equilibrium

    asked by chamy on April 22, 2012
  45. Physics

    A large disk of mass M and radius R is spinning like a CD of merry-go-round - that is, about an axis perpendicular to the plane of the disk. It is rotating at an angular velocity ? (initial). At some instant, a sphere of mass M/4 , which is initially not

    asked by Roxy on April 16, 2007
  46. History

    Can someone please check my history answers/questions? Thank you very much for your help! 1) How did the federal government use tariffs in the late 1800s to help the United States grow into an industrial power? A) to tax U.S. industry as a source of

    asked by Abby on October 24, 2015
  47. Math quick check thx

    Out of 42 kids in a class twice as many failed Ela as math,4 failed both. If 7 failed neither, find how many failed each subject. I made a venn diagram the middle part of the venn diagram would be 7 and the math part would be 13 and the ela part would be

    asked by Dam on June 6, 2011
  48. math

    the angle of elevation from point on the ground to the top of a pyramid is 20 degrees 20 degrees the angle elevation from a point 189 feet farther back to the top of the pyramid is 10 degrees 20 degrees. find the height of the pyramid

    asked by Anonymous on April 6, 2013
  49. maths help needed!(urgent)

    find the equation of the tangent to y=x-(a^3/x^2) at the point (a,0) how to i work this out??can someone please show me how to do it step by step?thanks!!! Take the dervative of y y= x- a^3 x^-2 y'=1+2a^3/x^3 so the equation for the tangent is y= mx + b

    asked by Emma on May 30, 2007
  50. Statistics

    Of the parts produced by a particular machine, 1.5% are defective. If a random sample of 11 parts produced by this machine contains 2 or more defective parts, the machine is shut down for repairs. Find the probability that the machine will be shut down for

    asked by HELP on November 30, 2013
  51. Physics

    How do I find the instantaneous acceleration of the earth orbiting the sun? Everything I am trying is incorrect. I am using 1 second as my time and get 1.99E-7 rads/second. First I tried: acceleration = theta x t / radius Where: theta = 1.99E-7 rads radius

    asked by Brenda on October 23, 2012
  52. Trigonometry

    From the top of a building 85ft high, the angle of elevation of the top of a vertical pole is 11 degree 6'. At the bottom of the building the angle of elevation of the top of the pole is 26 degree 7'. Find the height of the pole and the distance of the

    asked by Ayomide on April 21, 2017
  53. math

    the angle of elevation from point on the ground to the top of a pyramid is 20 degrees 20 degrees the angle elevation from a point 189 feet farther back to the top of the pyramid is 10 degrees 20 degrees. find the height of the pyramid

    asked by Anonymous on April 6, 2013
  54. Math

    After polling a class of 20 music students by a show of hands, you find that 8 students play the guitar and 9 students play the piano. Given that information, what is the minimum number of students in this music class who play both the guitar and the

    asked by Anonymous on April 24, 2015
  55. Algebra

    Wk 6 Sec 12.7 #24 World population growth In 2008 the world population was 6.7 billion and the exponential growth rate was 1.14% per year. A.Find the exponential growth function B.Predict the world’s population in 2014 C.When will the world’s

    asked by mema on June 8, 2011
  56. math

    Jon and Remy were in a car race. When Jon finished the race in 45min, Remy had only driven 2/3 of the distance. Remy's average speed for the race was 50m/min less than Jon's. a) Find the distance of the race. b) What was Remy's speed?

    asked by Al on April 30, 2012
  57. Math

    Dominic used the equation below to find d, the amount in dollars he would spend on gasoline to drive a distance of m, miles. d= m/25(3.5) Based on this equation how much would Dominic need to spend on gasoline to drive a distance of 1800 miles? A. $25.50

    asked by Reid on April 9, 2015
  58. Math (Algebra)

    Two groups went to the movies. The first group included 3 adults and 5 kids and paid a total of $71. The second group included 5 adults and 3 kids and paid a total of $81. If ticket prices were the same for each group, find the cost of each type of ticket.

    asked by Alyssa on November 5, 2015
  59. Calculus - Integrals

    Consider the region enclosed by the graphs of x=y^2-5 and x=3-y^2 a)Express the area of this region by setting up an integral with respect to x b) Express the area of this region by setting up an integral with respect to y c) Find the area of this region

    asked by Beth on April 13, 2017
  60. Physics

    Can someone please help me out on this... An ideal transformer has 50 turns in its primary and 250 turns in its secondary. 12 V ac is connected to the primary. Find: a. The volts ac available at the secondary. b. Current in the 10  device connected to

    asked by Alex on November 1, 2007
  61. math

    There are 25 red beads,x blue beads and y green beads in a box.When a bead is picked at random,the probability that it is blue is 1 over 4 and the probability that it is green is 1 over 3. (a)Find the value of x and y. (b)How many blue beads must be added

    asked by mandy on July 7, 2014
  62. Physic

    an someone please help me out on this... An ideal transformer has 50 turns in its primary and 250 turns in its secondary. 12 V ac is connected to the primary. Find: 1. The volts ac available at the secondary 2. Current in the 10  device connected to t

    asked by Ollie on November 2, 2007
  63. Statistics

    Find an example of application of Normal Distribution (or approximately Normal Distribution) in your workplace or business (or any other business that you are familiar with). Prove that the variable has the characteristics of a Normal Distribution. Recall

    asked by Kathy on October 8, 2010
  64. Math

    Marianna's cell phone company charged her an upfront fee and a monthly fee. After three months of service, she had paid a total of $154.95. After a year of service, she had paid a total of $559.95. Her monthly fee was $______. The upfront fee was $______.

    asked by John Doswell on March 23, 2016
  65. Algebra

    solve x+21/x+3

    asked by Cynthia on April 4, 2008
  66. Physics

    A spring has a spring constant that is 120 N/m, and has a 0.1 kg block attached to it. The spring and mass sit on a horizontal surface that has no friction. The block is pulled 0.2 m and then released. Please find the frequency of the oscillations, the

    asked by Jose Luis on November 26, 2015
  67. Success

    What is your definition of being successful? I suspect that your teacher would like for you to consider what makes a person successful. Each person must have his own measuring stick for his own feeling of having lived a successful life. This is what Ralph

    asked by bryan on March 16, 2007
  68. Math

    1. Iodine-131 is used to find leaks in water pipes it has a half life of 8.14 days. If 36 days have passed and there is now 2.34g left. What is the initial amount? 2. Sr-85 is used in bone scans and has a half life of 64.9 days. If there is 23 percent of

    asked by Scott on April 19, 2018
  69. Math

    You start a search for a buried object by marking the center of the field as (0,0), with coordinates giving distances in yards. Coordinates to the north or east are positive, and the coordinates to the south or west are negative. You find nothing at

    asked by Music on May 11, 2018
  70. physics

    An electronic tracking device is placed on a police dog to monitor its whereabouts relative to the police station. At time t1 = 23 minutes, the dogs placement from the station is 1.2km, 33 degrees north of east. At time t2=57 minutes, the dog's

    asked by Joe on July 8, 2008
  71. physics

    A baby elephant is stuck in a mud hole. To help pull it out, game keepers use a rope to apply a force FA, as part a of the drawing shows. By itself, however, force FA is insufficient. Therefore, two additional forces FB and FC are applied, as in part b of

    asked by thaokieu on January 30, 2011
  72. Math

    1.Which solid has one base that is a triangle and three lateral surfaces that are triangles? A:Triangular Pyramid*** B:Triangular Prism C:Rectangular Prism D:Rectangular Pyramid 2.A solid with two parallel and congruent bases cannot be which of the

    asked by Reeces on March 6, 2017
  73. masterin quantum

    Consider the left shift operator on the space of infinite sequences of complex numbers: L(z1,z2,…)=(z2,z3,…). Is L injective? Yes Yes - incorrect No Is L surjective? Yes Yes - correct No Find the eigenvalues and eigenvectors of L. Then complete the

    asked by JuanPro on April 6, 2015
  74. maths-urgently needed

    Atul invested Rs 75000 in buying Rs 200 shares of ABC Ltd paying a dividend of 20%. He bought them at a rate which gave him a yield of 16%. After a year he sold them at Rs 350 and invested the proceeds along with the dividend obtained in buying Rs 175

    asked by anoynomous on May 4, 2013
  75. physics

    A bar made of a particular metallic alloy has a length of 10 cm at a temperature of 24 oC and a length of 10.015 cm at the boiling point of water. (a) If a second bar made of the same material were 10 m at 24 oC, how much longer would this bar be at the

    asked by kelly on March 27, 2011
  76. Calculus

    Find the area of the region bounded by the curves y = x^2 - 1 and y = cos(x). I've tried doing this and I got -1.54 which doesn't make sense because area should always be positive right? And I put it in an online calculator to check and it gave me 3.11. I

    asked by Kait on March 8, 2018
  77. physics help

    A bar made of a particular metallic alloy has a length of 10 cm at a temperature of 24 oC and a length of 10.015 cm at the boiling point of water. (a) If a second bar made of the same material were 10 m at 24 oC, how much longer would this bar be at the

    asked by sam on March 26, 2011
  78. Math

    Hi Drawing a diagram will help: A ladder 5m long leans against a wall, with the top of the ladder (B) reaching 4m up the wall and the foot of the ladder (A) is 3m from the wall (C). A man is at a point D which is 2m up the ladder.Point E lies on line AC

    asked by Mintz on July 8, 2010
  79. maths-urgently needed ,plse

    Atul invested Rs 75000 in buying Rs 200 shares of ABC Ltd paying a dividend of 20%. He bought them at a rate which gave him a yield of 16%. After a year he sold them at Rs 350 and invested the proceeds along with the dividend obtained in buying Rs 175

    asked by anoynomous on May 4, 2013
  80. chemistry(total pressure)

    Two cylinders at 27C are connected by a closed stopcock ystem. One cyclinder contains 2.4 L of hydrogen gas at o.600 atm; the other cylinder contains 6.8L of helium at 1.40 atm. Assume valve take up no room. what is the total pressure when the valve is

    asked by Suzie on October 15, 2009
  81. Probability

    An image , corrupted with noise, has pixels which take the value 1 with probability q and 0 with probability 1−q, with q being the value of a random variable Q which is uniformly on [0,1]. Xi is the value of pixel i, but we observe Yi=Xi+N for each

    asked by organicCoco on November 15, 2018
  82. French

    Rédige un texte réaliste dans lequel tu inséreras, en les soulignant, a)3 termes qui se termine pas les sons /ar/ (ex:cigare,canard,tard...) b)3 termes poysémiques (un mot qui a plusieurs sens) qui appartient au champ lexical (un ensemble de mot qui

    asked by Anonymous on February 26, 2008
  83. Science

    Which adaptation helps some plants that live in the dry deserts? A.tall trunks B.long roots C.thin stems D.floating parts B? An animal that sleeps during the day MOST LIKELY lives in A.a tropical rain forest B.a tundra region C.a tide pool D.a hot desert

    asked by Colton on February 13, 2012
  84. math

    A card is selected from a deck. Find the following probabilities. A standard deck of cards has 52 Cards. There are 13 values and 4 suits. Suits are Spades, Clubs, Diamonds and Hearts. Each suit has 13 cards. There are 3 face cards Jack, Queen, and King. a

    asked by Erica on July 3, 2017
  85. physics

    There are two +q charges and two -q charges on the corners of a square of size a. Left upper corner= +q charge, right upper corner= -q charge, left lower corner= -q charge, and right lower corner= +q charge. Compute the net force on each charge. I know

    asked by Jessica on February 20, 2008
  86. chemistry

    Naturally occurring cobalt consists of only one isotope Co59 whose relative atomic mass is 58.9332. A synthetic radioactive isotope of cobalt Co60, relative atomic mass 59.9338, is used in radiation therapy for cancer. A 1.8516 sample of cobalt has an

    asked by Candace on June 30, 2012
  87. Math

    A pan of cold water with a temeprature of 35 degrees F is brought into a room with a temperature of 75 degrees F. After one hour, the temperature in the pan is 45 degrees F. a) Write a formula for the temperature (T) as a function of time (according to

    asked by Melissa on May 12, 2010
  88. alg

    2. Examine the rise in gasoline prices from 1997 to 2006. The price of regular unleaded gasoline in January 1997 was $1.26 and in January 2006 the price of regular unleaded gasoline was $2.31 (Bureau of Labor Statistics, 2006). Use the coordinates (1997,

    asked by Anonymous on July 5, 2009
  89. math

    An airplane travels with a speed of 145 mph in calm air. the wind is blowing with a velocity of 23 mph from N72degreesE. If the plane is headed in a direction N63W, find the magnitude of the speed and the direction of the airplane with reference to the

    asked by Dan on February 24, 2015
  90. Chemistry

    Naturally occurring cobalt consists of only one isotope, 59Co, whose relative atomic mass is 58.9332. A synthetic radioactive isotope of cobalt, 60Co, relative atomic mass 59.9338, is used in radiation therapy for cancer. A 1.8276g sample of cobalt has an

    asked by Vanessa on September 3, 2014
  91. math

    A community group bought 25 tickets to a play. Adult tickets cost $30 each and student tickets cost $20 each. In all, the group spent $620 on the tickets. Determine if each equation is a part of the system of equations that can be used to find the number

    asked by j on April 27, 2015
  92. chemistry... please help!

    Pure glacial acetic acid HC2H3O2 has a freezing point of 16.62 degrees C. Its freezing point depression constant is Kf=3.57 Cm^-1. A solution was made by taking 9.755 g of an unknown non-electrolyte and dissolving it in 90.50 g of glacial acetic acid. The

    asked by Anonymous on February 13, 2009
  93. Algebra

    John and Kathleen each improved their yards planting rose bushes and shrubs . They bought their supplies from the same store. John spent $228 on 12.rose bushes and 11 shrubs. Kathleen spent $108,on 6 rose bushes and 5 shrubs. Find the cost of one rose bush

    asked by Kevin on February 12, 2017
  94. Math

    he physics department of a college has 9 male professors, 8 female professors, 10 male teaching assistants, and 13 female teaching assistants. If a person is selected at random from the group, find the probability that the selected person is a teaching

    asked by Junior on July 2, 2014
  95. Math-geometry

    A regular polygon with all sides that are congruent and all angles that are congruent. Thus, the regular triangles are equilateral triangles, and the regular quadrilaterals are squares. All equilateral triangles are similar to one another and all squares

    asked by PLEASE HELP on February 26, 2013
  96. Math

    An examination is partly constantly as the number of subject entered. When the examination fee is 55000. Three subjects are entered when that examination fee is 700, five subjects are entered. Write a law of variation and find the number of subject if the

    asked by Saaior on March 8, 2018
  97. Physics

    The potential at location A is 370 V. A positively charged particle is released there from rest and arrives at location B with a speed vB. The potential at location C is 790 V, and when released from rest from this spot, the particle arrives at B with

    asked by Mary on September 25, 2007
  98. Machanics

    An electron moving at a speed of 5 multiply by 10 raise to power six m/s was shot through a sheet of paper which is 2.1 multiply by 4cm thick.the electron emerges from the paper with a speed of 2 multiply by 10 raise to power six m/s,find the time taken by

    asked by Anonymous on January 13, 2013
  99. math-pre calc

    On a drive from your home to town, you wish to average 48 mph. The distance from your home to town is 106 miles. However, at 53 miles (half way), you find you have averaged only 36 mph. What average speed must you maintain in the remaining distance in

    asked by liz on September 24, 2014
  100. Math-geometry

    A regular polygon with all sides that are congruent and all angles that are congruent. Thus, the regular triangles are equilateral triangles, and the regular quadrilaterals are squares. All equilateral triangles are similar to one another and all squares

    asked by Urgent!! on February 25, 2013

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