Questions Asked on
February 8, 2015

  1. finite math

    Recall from Example 1 that whenever Suzan sees a bag of marbles, she grabs a handful at random. She has seen a bag containing three red marbles, five green ones, four white ones, and three purple ones. She grabs eight of them. Find the probability of the

    asked by Anonymous
  2. physics

    A 66-kg baseball player slides into third base. He starts his slide at a speed of 4.3 m/s and his speed is zero just as he reaches the base. If the coefficient of friction between his clothes and the surface of the baseball infield is 0.60, determine the

    asked by mathew
  3. math:order of operation

    TWO PART Ellen is playing a video game in which she captures butterflies. There are 3 butterflies onscreen, but the number of butterflies doubles every minute. After 4 minutes, she was able to capture 7 of the butterflies. A)LOOK FOR A PATTERN. Write an

    asked by Kara
  4. geometry

    Triangle DEF where angle E is a right angle. DE measures 55. EF measures x. Angle D measures 49 degrees. What is the value of x rounded to the nearest hundredth? Type the numeric answer only in the box below.

    asked by Bella
  5. Interior Design

    please check my answers? Your client wants his dining room to be a cozy, dark, nighttime room where he can entertain just one or two people for casual, intimate dinners. The room won't be used during the day. The unfurnished room has a low seven-foot

    asked by lila
  6. Physics

    A car traveling 85km/h slows down at a constant 0.52m/s2 just by "letting up on the gas." Calculate the distance the car coasts before it stops.

    asked by Katy
  7. Calculus

    At 2:00pm a car's speedometer reads 60mph, and at 2:10pm it reads 65mph. Use the Mean Value Theorem to find an acceleration the car must achieve. Answer( in mi/h2):

    asked by Dee
  8. math

    The third and fifth term of an arithmetic progression are 10 and-10 respectively. a)Determine the first and the common difference t3 = a + 2d = 10 t5 = a + 4d = -10 -a -2d = -10 a + 4d = -10 2d = -20 d = -10 a + 2(-10) = 10 a -20 = 10 a = 30; d = -2 b)The

    asked by kudu
  9. math

    if you were to sketch a circle graph for a data. what fraction of the circle would represent food and the food $450

    asked by leana
  10. language

    May this is it ; Storm over ocean torrents of rein dropping downward and theirs no sign that its stopping anytime soon/ face and fingers dripping./as into the see the slick skies slip. I'm not sure .

    asked by Gabe
  11. English

    Correct punctuation for Boston, Massachusetts Played an important role in American history and politics.

    asked by Diane
  12. English

    Words: curtail devastate Disgress Incentive Incorporate Indispensable Intermittent Rigor Squander Succumb (1,2)Duane feels he ____(e)d too many years in inactivity, so now he welcomes the _______s of an exercise program. (3,4) The company decided to

    asked by Celine
  13. math

    Gabe went to the amusement park with $40 to spend. His ticket cost $26.50. Write and solve an inequality to show how much he might spend on souvenirs and snack. Please tell me how you got this answer to this question.

    asked by maria
  14. math

    A recipe for 1 batch of muffin included 2/3 cup of raisins. Ina made 2 1/2 batches of muffins. How many cups of raisin did she use. Is the answer 1 5/6

    asked by anonymous
  15. geometry

    Isosceles trapezoid JKLM has legs Jk and LM and bases KL and JM. Jk=8X+5 KL=4X+1 LM=10x+4 and MJ=18X+3, area of JKLM?

    asked by al
  16. science

    A nail is driven into a board with an initial kinetic energy of 150 j. If the potential energy before and after the event is the same, what is the change in the internal energy of the board and nail?

    asked by nireen
  17. Chemistry

    What mass of sucrose (C12H22O11) should be combined with 477g of water to make a solution with an osmotic pressure of 8.15atm at 275K ? (Assume the density of the solution to be equal to the density of the solvent.)

    asked by chemstud
  18. Stats

    A basketball player makes 80% of her free throws. Recently during a very close game, she shot 5 free throws near the end of the game and missed 3 of them. The fans booed. What is the probability of her missing 3 (or more) free throws out of 5? Set up and

    asked by Maddie
  19. math

    Two angles of a quadrilateral measure 130° and 20°. The other two angles are in a ratio of 5:16. What are the measures of those two angles?

    asked by theodore jabooa
  20. algebra

    A math class has a total of 47 students. the number of females is 17 less than the numberof males. how many males and how many females are in class?

    asked by greg
  21. chemistry

    Calculate the energy of a photon of wavelength 3.1 µm with that of wavelength 0.166 nm. What I Got: 3.1 µm photon: 6.36x10^22j 0.166nm photon: 1.23x10^19j Also, what region of the electromagentic spectrum would each of these measurements belong to?

    asked by alex
  22. Math

    Leena bakes a loaf of bread. She eats 1/8 of the loaf and gives 1/6 of it to each of her 3 friends. What fraction of the loaf of bread is left?

    asked by Sophia
  23. Math

    Find all the solutions of the equation in the interval {o,2pi) sec^2x+tanx=1

    asked by Tonya
  24. math

    kellys dog eats 1 2/3 bones in 10 days. How many bones will he eat in 18 days?

    asked by Johnny
  25. chemistry

    A solution contains naphthalene (C10H8) dissolved in hexane (C6H14) at a concentration of 11.39{\rm \\%} naphthalene by mass. Calculate the vapor pressure at 25 ∘C of hexane above the solution. The vapor pressure of pure hexane at 25 ∘C is 151 torr.

    asked by kales
  26. Physics

    One gram of palladium has 5.66×10^21 atoms, and each palladium atom has 46 electrons. How many electrons are contained in 7.00g of palladium? The elemental charge is1.6×10^−19C. Answer in units of electrons. The answer is 1.82252x10^24 for Part A. i

    asked by Danny
  27. physics

    You work at a garden store for the summer. You lift a bag of fertilizer with a force of 122 N, and it moves upward with an acceleration of 0.760 m/s2.

    asked by Eva
  28. Algebra

    A rectangular swimming pool is twice as long as it is wide. A small concrete walkway surrounds the pool. The walkway is a constant 2 feet wide and has an area of 196 square feet. Find the dimensions of the pool.

    asked by Carlos
  29. art103

    Describe the shapes in this painting. Are the shapes organic or geometric? Which ones? Describe how the shapes interact, or "touch" each other. Are the edges of the shapes soft or hard? Do they bump, blend, or overlap? Support your answers with specific

    asked by abdulkadir
  30. Physics

    A rope is attached from a truck to a 1403 kg car. The rope will break if the tension is greater than 2375 N. Neglecting friction, what is the maximum possible acceleration of the truck if the rope does not break? m/s2 If the truck can reach 30 mph within

    asked by Eva
  31. English(ASAP)

    Hi, I need help on this as soon as possible. Thank you. 1. Which of the following events, characters, or objects can be said to make a swerve? A. A snowstorm and a cloudburst. B. A roller skater and a seal. C. A rainstorm and a bicyclist. D. A seal and a

    asked by Tia
  32. physics

    The drawing shows a square, each side of which has a length of L = 0.250 m. Two different positive charges q1 and q2 are fixed at the corners of the square. Find the electric potential energy of a third charge q3 = -7.00 x 10-9 C placed at corner A and

    asked by ciaran
  33. Calculus

    Graph the function f(x)=x+4/x Graph the secant line that passes through the points (1,5) and (8,8.5) on the same set of axes Find the number c that satisfies the conclusion of the Mean Value Theorem for f on [1,8] c= Notice that if you graph the tangent

    asked by Bob
  34. chemistry

    Balance redox reaction. Fe(s) + O2(g) + H2O(l)-->Fe2+(aq) +OH-

    asked by michelle
  35. solid mensuration

    A pyramid V-ABCD is cut from a cube of edge 12 in.,as shown in the figure. The vertex V is the midpoint of an upper edge of the cube. Compute the lateral surface of the pyramid.

    asked by Rosebymae
  36. physics

    a boy of mass 40kg and a girl of 30kg play on a see saw of negligible weight.if the boy sits 270cm from the pivot of the see-saw where must the girl sit to make it balance

    asked by randy
  37. Physics Dynamics

    A 10-kg block is pushed against a vertical wall by a horizontal force of 100 N. What is the coefficient of static friction between the block and the wall if the block is about to slide down?

    asked by Anonymous
  38. Math (Pre-Calc)

    Find all the solutions of the equation in the interval {o,2pi) 5sqrt3 tan x+3=8sqrt3 tan x

    asked by Fiona
  39. physics

    A wheel starts from rest and rotates with constant angular acceleration to an angular speed of 9.3 rad/s in 1.39 s. Find the magnitude of the angular acceleration on the wheel

    asked by Johnny
  40. Criminal Justice/Judicial System

    History makes it clear that the federal bench has attracted people from a fairly select demographic, usually the __________ and __________ classes. A. lower upper; upper upper B. upper middle; upper C. middle; upper middle D. lower; middle I think it's D,

    asked by Pat
  41. Criminal Justice/Judicial Process

    While legal experts recommend a felony caseload of no more than __________ per attorney per year, some attorneys represent upwards of 1,000 indigent defendants in any given year. A. 200 B. 100 C. 150 D. 50 I think it's A, but not sure

    asked by Pat
  42. physics

    A tennis ball (mass 57.0 g) moves toward the player's racquet at 46.4 m/s. It is in contact with the racquet for 3.60 ms, after which it moves in the opposite direction at 49.8 m/s. What is the average force on the ball due to the racquet? (Assume the ball

    asked by Ava
  43. Language

    Rewrite each line of poem by putting capital letters and punctuation marks where they belong.I have tried to get this but i'm lost. Poem : Storm over ocean torrents of rein dropping downward, and theirs no sign that its stopping anytime soon. Face and

    asked by Gabe
  44. Math

    If a and b are positive numbers, find the maximum value of f(x)=x^a(1−x)^b, 0≤x≤1 Your answer may depend on a and b.

    asked by Dee
  45. History

    Where is the erie canal located? A- New york B- New Jersey C-Maryland D- Maine Cities grew along railroads and canals because A- the government designed the cities B- workers could not live anywhere else C- settlers could obtain cheap land nearby D- there

    asked by Katie
  46. physics

    REALLY NEED HELP WITH THIS PLEASE. One gram of palladium has 5.66×10^21 atoms, and each palladium atom has 46 electrons. How many electrons are contained in 7.00g of palladium? The elemental charge is1.6×10^−19C. Answer in units of electrons. The

    asked by Danny
  47. physics

    In the lab, a relativistic proton has a momentum of 1.00 × 10-19 kg · m/s and a rest energy of 0.150 nJ. What is the speed of the proton in the lab? (c = 3.00 × 108 m/s, m proton = 1.67 × 10-27 kg): *

    asked by Anonymous
  48. statistics

    a researcher weighs each individual in a sample of 25 laboratory rats and calculates the average weight for the group. the average weight is an example of a ____ .

    asked by Anonymous
  49. Calculus

    I am in a car and travel for 12 minutes. Below are the speeds in mph, recorded every two minutes. Use trapezoids, right-bound rectangles, and midpoint rectangles to estimate the distance I traveled. Min 0 2 4 6 8 10 12 Speed 20 22 35 46 50 50 20

    asked by Anonymous
  50. algebra

    A cash register contains only five dollar and fifty dollar bills. It contains four times as many five dollar bills as fifty dollar bills and the total amount of money in the cash register is $2,870. How many fifty dollar bills are in the cash register?

    asked by nelson
  51. 6th grade math

    To qualify for a store discount, Clay's soccer team must spend at least $560 for new jerseys. The team needs 20 jerseys. Write and solve an inequality to represent how much the team should spend on each jersey to qualify for the discount.

    asked by Alex
  52. physics

    an arrangement of four disks are suspended by cords. The longer, top cord loops over a frictionless pulley and pulls with a force of magnitude 81.2 N on the wall to which it is attached. The tensions in the shorter cords are T1 = 62.7 N, T2 = 33.6 N, and

    asked by Anonymous
  53. Physics Dynamics

    A 4-kg block is connected by means of a massless rope to a 2-kg block. What is the magnitude of the acceleration if the coefficient of kinetic friction between the 4-kg block and the surface is 0.20? Note : The 4kg block is on the table, the pulley is on

    asked by Anonymous
  54. physics

    One gram of palladium has 5.66×10^21 atoms, and each palladium atom has 46 electrons. How many electrons are contained in 7.00g of palladium? The elemental charge is1.6×10^−19C. Answer in units of electrons. The answer is 1.82252x10^24 for Part A. i

    asked by Danny
  55. Math

    Find all pairs of integers whose difference is 5 and product is 234.

    asked by Anonymous
  56. Physics

    A uniform rod of weight 5N and lenght 1m is pivoted at a point of 20 cm from one of its ends. A weight is hung from the other end so that te rod balances horizontally. What is the value of the weight? How do I find it if I don't know the weight at the

    asked by Kiwiwi
  57. science

    an electric water pump raises 500 kg of water through a vertical height of 25 m in 50 sec. Calculate the power of electric pump. Take g=10N/kg

    asked by Ayantika
  58. Chemistry

    When 20.1 g Sb2S3 reacts with an excess of Fe, 9.84 g Sb is produced. What is the percent yield of this reaction? My work so far... converted 20.1g of Sb2S3 to moles 20.1/149.8=.134 .134Sb2S3*2moles Sb/1 mole Sb2S3=.268*121.7=32.6 of Sb

    asked by Gianna
  59. chem II

    0.959 g of a hydrocarbon is dissolved in 10.00g of benzene. The freezing point of the solution is 1.16C. Find the molecular mass of the hydrocarbon. Benzene has a Kf of 5.12 and a freezing points of 5.53 degrees C. Not sure how to go about solving this

    asked by Steph
  60. Chemistry

    For a one step reaction, the activation energy for the forward reaction is 40.0 kJ mol-1, and the enthalpy of reaction is -20.0 kJ mol-1. Calculate the activation energy for the reverse reaction. Is my answer correct? (40 kJ mol-1)-(-20 kJ mol-1) = 20kJ

    asked by Anonymous
  61. Business Math

    Ms. Hardin invested $60,000 in three stocks. The first year, stock A paid 7% dividends and increased 4% in value; stock B paid 8% dividends and increased 5% in value; stock C paid 9% dividends and increased 3% in value. If the total dividends were $4620

    asked by Hali
  62. physics

    Starting from rest, a 11.70 kg suitcase slides 3.14 m down a frictionless ramp inclined at 40° from the floor. The suitcase then slides an additional 4.68 m along the floor before coming to a stop. (a) Determine the suitcase's speed at the bottom of the

    asked by sarah
  63. stats

    On a test of motor coordination, the population of average bowlers has a mean score of 24, with a standard deviation of 6. A random sample of 30 bowlers at Fred's Bowling Alley has a sample mean of 26. A second random sample of 30 bowlers at Ethel's

    asked by lisa
  64. Trigonometry

    The shadow of an electric pole is 5 m. long when thr angle of elevation of the seen is 60 degrees. Find the length of the shadow when the angle of elevation of the seen is 45 degrees

    asked by Res
  65. Math

    Jenny was planting flowers for her garden. She had to plant 4 rose flowers for every jasmine flower she planted. If she plants 100 flowers in all, how many will be jasmine flowers?

    asked by Student
  66. English

    In a well organized essay, analyze the language and rhetorical devices the narrator uses to convey his attitude toward Hester and toward women in general Thesis The narrator conveys his attitude towards Hester through descriptions of her during her

    asked by Amy
  67. math

    This problem is about pizza. You have a circular pizza and you want to slice it with n straight cuts into the maximum number of pieces possible (not necessarily all of the same size). Let Pn = this maximum number of pieces you can slice a pizza into with n

    asked by Ralph
  68. chemistry

    A 25.0 mL sample of drinking water suspected to contain lead(II) ions is treated with excess 0.800 M sodium chloride. A precipitate forms, which is filtered, dried, and weighed. 1.36 g of precipitate are collected. What was the concentration of lead in the

    asked by Nguyen
  69. Chemistry

    How many joules of energy are released when 45.0g of water cools from 18.0C to 70.0C? Specific heat of water is 4.184J/gC.

    asked by Mary
  70. physics

    In a game against the White Sox, baseball pitcher Nolan Ryan threw a pitch measured at 44.8 m/s. If it was 18.4 m from Nolan's position on the pitcher's mound to home plate, how long did it take the ball to get to the batter waiting at home plate? Treat

    asked by Ava
  71. Calculus

    By applying Rolle's theorem, check whether it is possible that the function f(x)=x^5+x−5 has two real roots. Answer: (input possible or impossible ) Your reason is that if f(x) has two real roots then by Rolle's theorem: f′(x) must be (input a number

    asked by Sarah
  72. math

    jeff has a big scoop of ice cream that is 10 inches tall it melts by 25% in a minute whats the height of the ice cream after one minute

    asked by joey
  73. Physics

    Can someone show me and explain a step by step process how to do this problem? Thanks 1) Two equal but opposite charges re separated by a distance d. Determine a formula for VBA = VB – VA for points B and A on the line between the charges situated as

    asked by Lyn
  74. physics

    A man stands at the midpoint between two speakers that are broadcasting an amplified static hiss uniformly in all directions. The speakers are 37.0 m apart and the total power of the sound coming from each speaker is 0.448 W. Find the total sound intensity

    asked by David Egan
  75. pre-calc

    A box with an open top is to be constructed by cutting equal-sized squares out of the corners of a 18 inch by 30 inch piece of cardboard and folding up the sides. a) Let w be the length of the sides of the cut out squares. Determine a function V that

    asked by moshie
  76. problem

    Value Rent-A-Car rental a luxury car at a daily rate of $42.15 plus 50 cents per mile. A business person is allotted $130 for car rental each day. How many miles can the business person travel on the $130?

    asked by B
  77. physics

    A 2011 kg elevator moves with an upward acceleration of 1.9 m/s2. What is the tension in the cable that supports the elevator?

    asked by Eva
  78. math

    A point is directly below a window. Another point B is 15 m from A and at the same horizontal level. From B angle elevation of the top of the bottom of the window is 300 and the angle elevation of the top of the widow is 350. Calculate the vertical

    asked by kudu
  79. science

    i need help with a reason for the season science lab of how earth orbits sun

    asked by selina
  80. physics

    A 0.60 kg object with an initial velocity of 3.0 m/s in the positive x direction is acted on by a force in the direction of motion. The force does +2.5 J of work. What is the final velocity of the object?

    asked by Anonymous
  81. Math 1105

    if two identical squares have a total area of 18x^2+36x+18, find the length of one side of one of the squares

    asked by Anonymous
  82. maths

    find the number of revolutions taken by the wheel of a truck to cover a distance of 78.5 km if the diameter of the wheel is 1m

    asked by shehzad
  83. math1979

    A stock that sold for $17per share at the beginning of the year was selling for$96 at the end of the year. If the stock paid a dividend of $3.57 per share, what is the simple interest rate on the investment in this stock? Consider the interest to be the

    asked by mako
  84. geometry

    The first term of a geometric sequencf is 3 and the sum of the second and the third term is 60.determine the first three terms and the general term Tn

    asked by Snontia
  85. algebra

    An alligator’s tail length, T, varies directly as its body length, B. An alligator with a body length of 4.5 feet has a tail length of 2.5 feet. What is the tail length of an alligator whose body length is 5.4 feet?

    asked by lynn
  86. Math

    There are 750 students in a school. If the number of girls is 120 more than the boys, how many boys are there in the school?

    asked by Student
  87. math

    Show how to write and evaluate an expression to represent and solve this problem: Jeff and his friend each text four classmates about a concert. Each classmate then texts four students from another school about the concert. If no one receives the message

    asked by kyle
  88. Criminal Justice/Judical System

    A federal judge can be removed from the bench via: A. public vote. B. impeachment in the House of Representatives and conviction by the Senate. C. discretion by the president of the United States. D. a majority vote by other federal judges. I think it's

    asked by Pat
  89. English

    In a well organized essay, analyze the language and rhetorical devices the narrator uses to convey his attitude toward Hester and toward women in general I felt that my previous thesis was not strong at all and I would like to change it and make it better.

    asked by Amy
  90. math

    let X1,X2,X3 be random sample with pdf f(x)=exp(-x),x>0,find the joint pdf of Y1=X1/X2, Y2=X3/(X1+X2) ,Y3=X1+X2, and find pdf of Y1. Are Y1,Y2,Y3 independent?

    asked by assma
  91. art

    What is the salary in Canada for the following careers: Fashion Designer Comic book artist Hair stylist/designer (theater and stage) I need help i have to know this for art because these careers relate to art.

    asked by human
  92. statistics

    Suppose we want to estimate the average number of purchases in a given hour in a local convenience store. Using this example describe in your own words how you would go about determining this average through: A.) Drawing a random sample: Drawing a random

    asked by slomo
  93. Physics

    A projectile is launched at 5.4 m/s with an initial angle of 22 degrees from an initial height of 2.6 meters. Where will it land? How fast, and at what angle will it be going when it hits the ground?

    asked by Zach
  94. math

    A bag contains 5 red and 4 green apples. Michael takes one apple at random from the bag. His sister Ashley then takes an apple at random from he bag. What is the probability that the two apples are the same colour? Can you explain to me how to do this

    asked by Anna
  95. math

    Tuition of $1762 will be due when the spring term begins in 8 months. What amount should a student deposit today, at 5.47%, to have enough to pay the tuition?

    asked by mako
  96. Physics

    I am reviewing for a test and I don't know how to attempt this question. Could someone please work through this problem and then have the general steps that I need to take to solve the question? Here is the question: A rocket expels gases at a rate of 1.30

    asked by Baxter Reus
  97. math

    trying to help the kid with hw but not smart enough. please help. Thank You! -(5/7) ^ -2/5 can be written as -(a)^b where "a" is a positive rational number that is greater than 1 and "b" is a positive rational number that is less than 1. Find 'a' and 'b'

    asked by john
  98. Genetics

    which do you think was the more far-reaching accomplishment, determining the structure of dna, or sequencing the human genome? state a reason for your answer

    asked by Shala
  99. math

    let X1,X2,X3 be random sample with pdf f(x)=exp(-x),x>0,find the joint pdf of Y1=X1/X2, Y2=X3/(X1+X2) ,Y3=X1+X2, and find pdf of Y1. Are Y1,Y2,Y3 independent?

    asked by assma
  100. Physics

    I don't really know where to start on the problem. Would I use V = k(q/r)? But what would I do afterwards. Much explanation on how to go about the problem is much appreciated. Thank you. 1) Three point charges are arranged at the corner of a square of side

    asked by Aria
  101. Vectors/Scalars?

    is (u dot v)dot (a dot c) a scalar quantity or vector quantity? What's the difference? (I'm thinking scalar since it has no direction and it only has magnitude.)

    asked by annonymous
  102. math

    A lamp that normally sells for $35 is on sale for 35% off. How much will the lamp cost after a 8% sales tax?

    asked by Lauren
  103. History

    Which of the following types of institutions played a significant role in supporting and disseminating scientific knowledge in the 17th Century? (choose all that apply) a. scientific journals b. royal academies of science c. coffeehouses d. research

    asked by Lilly
  104. history

    Which factors has revolutionised world history by patrick manning ?.I have written about world war and industrial but am not sure i wrote the right answers.

    asked by comeford
  105. precalculus

    Find the number of negative integers greater than -500 that are divisible by 33. Also find their sum. How do I set up this problem?

    asked by anon
  106. Physics Dynamics

    A 5.0-kg box is pulled horizontally with a 45-N force that makes angle of 40 degree with the horizontal. The coefficient of kinetic friction of the surface is 0.20. What is the magnitude of the acceleration of the box?

    asked by Anonymous
  107. phys chem

    how much energy (kj/mol) is required to break the hydrogen bond in water (Er=80.0) (Er= Relative permitivity) I'm really not sure how to approach this, and if i need enthalpies of vaporization or not...

    asked by Tom
  108. math

    Samuel bought three cups and four spoons for Kshs 324. Daniel bought five cups and Mary bought two sppons of the same type as those bought by Samuel. Daniel paid Kshs 228 more than Mary. Find the price of each cup and spoon.

    asked by John
  109. Physics

    A light string is attached to both a hanging mass m1 = 5 kg and to a pulley of mass m2= 6 kg, and radius R = 0.75 m. If the pulley is a solid disc rotating about its center with a moment of inertia of I = 0.5*m2R2, and the string does not slip on the

    asked by Anonymous
  110. Math

    Expand then collect like terms: 3(x + 2) + x + 2

    asked by Person
  111. geometry

    The third term of a geomatrie sequence is 6 and the sixth term is 3/32.determine the fist three terms and the general term Tn

    asked by Snontia
  112. trigo

    find the period, amplitude,zeros, extreme points at maximum and minimum of the given function: 1.y = sin( -2x) 2.y = 4 sin( 5x) 3.y = -3 sin (3x/5) 4.y = 1/2 cos (-4x)

    asked by rhine
  113. maths please help and explain

    A. 16p^2-4q^2/(6p^2-7pq+2q^2) *6p^2-13pq+6q^2/(4p^2-4pq-3q^2) B. a^2+a-2/(6a-12) / a+2/(a^2-3a+2) C.3/(x-3) -x^2/(6+x-x^2) -2/(x+2) D.x+1/(x^3-1) - 1/(x^2+x+1) Key * multiplication !

    asked by Lesley
  114. physics

    If there is a constant towing force of 1.5 kN, how long would it take a tow truck to tow a 1400 kg car from rest to 52 km/h? (Assume a rolling resistance of 215 N).

    asked by nesh
  115. STATS

    . The time to fly between New York City and Chicago is normally distributed with a mean of 180 minutes and a standard deviation of 17 minutes. What is the z-score that corresponds to a random variable X outcome of 190 minutes?

    asked by Susan
  116. physics

    isolate for t s = ut + 1/2at^2 please show all ur steps  

    asked by samuel
  117. physics

    3. Calculate the magnitude of the force required to cause an anterior dislocation of the glenohumeral joint given that he force has a lever arm of 52 cm, the maximum magnitude of the resistance force is 1080 N and the resistance force has a lever arm of

    asked by kkuh
  118. mechanics

    (ii) Calculate the direction and magnitude of the joint force at the mid-point between the fourth and fifth lumbar vertebrae by considering the forces and moments acting on the lower body. Direction of joint force at midpoint between L4 and L5 = F =? ILB

    asked by kkuh
  119. chemistry

    given relative permitivity of water, how much energy (kj/mol) is required to break the hydrogen bond in water? (Er=80.0)

    asked by tom
  120. Math

    On January 31, a count of ending inventory was completed, and 7,200 units were on hand. Using the periodic inventory system, calculate the cost of goods sold and ending inventory using LIFO, FIFO, and weighted-average inventory methods.

    asked by Theresa
  121. math

    jeff has a big scoop of ice cream that is 10 inches tall. it melts by 25%in a minute.whats the height of the ice cream after one minute

    asked by joey
  122. Vectors and Math

    Find x, y, and z if 2(x,-1,4)-3(-4,y,6)-1/2(4,-2,z)=(0,0,0) What I did: (2x,-2,8)-(-12,3y,18)-(2,-1,1/2z)=(0,0,0) (2x-14,-1-3y,-10-1/2z)=(0,0,0) Textbook answer is -5, -1/3, -20

    asked by annonymous
  123. math

    Let x1,x2,x3 be random sample with pdf f(x)=exp(-x),x>0 find the joint pdf of y1=x1/x2, y2=x3/(x1+x2),y3=x1+x2 find pdf of y1 Are y1,y2,y3 independent?

    asked by assma
  124. Physics

    Help I don't understand how to do this homework question, we didn't go over any like it in class. A car has an average speed of 80.0km/h for 1 hour, then an average speed of 90.0km/h for 2 hours during a 3 hour trip. what was the average speed for the 3

    asked by Sam
  125. Math

    This is trigonometry: A tree's height is unknown so we have to solve for the height of the tree. The tree casts a 11m shadow. And the angle of the triangle is 36 degrees.

    asked by Izzy
  126. geom.

    Given a triangle ABC, draw straight lines from the vertex A to n points on the opposite side BC. (None of these n points can equal B or C.) Then do the same for the vertex B, drawing n lines from B to the side AC. Into how many parts do these 2n lines

    asked by Ralph
  127. English

    An upper-secondary school is a senior high school. Then is a lower-secondary school a junior high school? Where is the expression 'a lower-secondary school' used?

    asked by rfvv
  128. math

    Let x1,x2,x3 be random sample with pdf f(x)=exp(-x),x>0 find the joint pdf of y1=x1/x2, y2=x3/(x1+x2),y3=x1+x2 find pdf of y1 Are y1,y2,y3 independent?

    asked by assma
  129. college algebra

    Solve the equation with rational exponents. (X-1)^2/3=36

    asked by Brittany
  130. MATHS

    Long ago when apples were cheap, two ladies went to market and each sold 30 apples on different stalls; Mrs Rosy sold hers at 2 for a penny, Mrs Juicy at 3 for a penny. The next week they decided to share a stall and sell 60 apples between them at 5 for 2

    asked by LISA
  131. Genetics

    Researchers at the University of Rochester studies children born with an infection called roseola. The children also have the causative herpesvirus inserted into their chromosomes. At least one percent of each child had the virus in a chromosome of a

    asked by Hampton
  132. Math

    If x+2y=4 and xy=-8, what is the value of x^2+4y^2. I have been thinking about this and can't make heads or tails of it.

    asked by Bethany
  133. stats

    Joes test score was 450(1 standard deviation below the population mean550) A good guess for Joes test score is

    asked by ben
  134. Physics

    Why are household lamps are not connected series?

    asked by Penny
  135. Math

    Yalda has six $5 notes, ten $10 notes and four $20 notes in her purse. If she takes out one note, what is the probability that it will be: A) a $20 note B) a $5 or $10 note C) a $50 note D) she buys a new toaster with a $20 note and a $10 note. If she now

    asked by Arzam
  136. chem

    Calculate the energy of a photon of green light with a frequency of 5.96 ✕ 10^14 s−1 I keep getting 3.88e-21, but the quiz keeps saying I'm wrong...

    asked by james
  137. math

    Prove that it is impossible to tile an 8 × 8 checkerboard with 1 × 3 tiles

    asked by Ralph
  138. accounting

    what accounts are affected when you invest in additional equipment for the business?

    asked by marie
  139. math

    Two towns P and Q are 400 km apar. A bus left for P and Q. It stopped at Q for one hour and then started the return to P. one hour after the departure of the buse from P, a trail also heading for Q left P. the trailer meth the returning bus ¾ of the way

    asked by kudu
  140. 4th grade math fraction

    How do I show the work to find the fraction with the greatest value? 7/10, 1/5, 9/10 5/6, 7/12, 7/10

    asked by fraction with the greatest value
  141. Science

    I am reviewing for a test and I don't know how to attempt this question. Could someone please work through this problem and then have the general steps that I need to take to solve the question? Here is the question: A rocket expels gases at a rate of 1.30

    asked by Baxter Reus
  142. Chem

    Write equation showing how to 2-phenylethanol could be prepared for each of the following starting materials: a) ethyl 2-phenylethanoate Thank you!

    asked by Help!
  143. religion

    What are benefits and challenges you can experience in trying to love according to biblical teachings? What are benefits and challenges you can experience among people of different cultures and faiths?

    asked by rose
  144. Math

    The sum of two counting numbers is 243. Half of one number is four times the other number. What are the numbers? 121.1+122.2=243.2

    asked by Anonymous
  145. technology - automotive

    what is a long frame jack?

    asked by thi
  146. math

    Below is a sequence an, for n = 0, 1, 2, ... n 0 1 2 3 4 5 6 7 8 9 an 25 25 19 25 61 145 295 529 865 1321 Use the method of finite differences to find a closed formula for this sequence.

    asked by Ralph
  147. Maths, consumer studies, CAT, life science,

    Which careers can i persue with those subjects?

    asked by Kutullo
  148. unknown fractions

    Is there an easier way to solve the following problem without going through 100 guesses trying to find two numbers that total de area and the perimeter. ps I'm the mom trying to explain to my kid The perimeter of a rectangular banner is 72 inches. The

    asked by Lilly
  149. maths

    find the following lonear equqtion by mtrix method 12p+4q+17r+11s=5 14p+8q+9r+4s=8 3p+7q+2r+5s=12 5p+12q+9r+7s=7

    asked by saloni
  150. math

    use these 5 digits to make 24 0-1-2-3-4 Use each digit only once. record how you made 24

    asked by jeff
  151. Chemistry, HELP!!

    Write two hydrolysis reactions for Cu^2+ reacting with water in each step to form CuOH^+ and Cu(OH)2. The hydrolysis constants for the two reactions are: log kh1 = -7.7 and log Kh2 = -6.1

    asked by Brian
  152. math

    compare 2 fractions with different numerators and denominators

    asked by tony
  153. math

    what is the answer for the question I posted!!!!!!!!!!!!!!!

    asked by madeline
  154. Math

    identify the conditions on x that make the following statement true, if they can be made true at all: 9^x > 1 9^x < 1 9^x = 1 9^x = 0 9^x < 0 what is the question asking for?

    asked by Dan
  155. math

    simplify: ____1____ _____1______ ¡Ì2 ¡Ì3 ¡Ì2 ¡Ì4 ¡Ì3

    asked by rutvik
  156. Physics

    Can someone please help me solve this question please: In the following position as a function of time equation, find the units of the constants A, B, and C. Where x is the position and has units of L, and v is velocity, and t is time.  x = Av + Bt^2 + C

    asked by Sammie
  157. 6th grades math

    Alyssa's shelves hold 31 books each. How many shelves will Alyssa need if Alyssa has 248 books?

    asked by haley
  158. phi 103

    For John Dewey, open-minded inquiry is: (Points : 1) The virtue that prevents habit from making us unwilling to hear other ideas Something only a child can do For people who are weak in their beliefs Reinforcing our own beliefs by talking with people who

    asked by sam
  159. math

    Among the integers from 1 to 10, 000, 000, 000 which are there more of: Those in which the digit 1 occurs or those in which it does not occur?

    asked by Ralph
  160. math algebra 8

    Jim creates mixtures for new candies. His boss gives him 20 pounds of 12% milk powder, and 32 pound of 20% milk powder. How many pounds of 12% milk powder jim uses if Boss wants him make 30 pounds of 18% milk powder for candies. Please help to answer , and

    asked by khu
  161. Math

    Hi! My teacher told my class that the answer to this question is "1-sin x/cosx" but she wants us to figure out why. I tried solving it but I didn't end up with the answer given. Can someone help me? Thank you! Problem: cos x/1+sinx

    asked by Kelly
  162. chemistry

    how do I calculate the area occupied by one single molecule, given # of molecules per meter^2 (9.6e15), the Molarity? (.1 m/dm^3) and surface excess? (1.6e-8)

    asked by Tom
  163. science

    write the formulea for combining sodium and water balance the equation

    asked by josiah
  164. chemistry

    why would dipole moment increase with temperature for a planar molecule? even though those are inversely related...

    asked by paul
  165. Math

    A jet pilot is making a 1000 mile trip in her military Tomcat. She flies 800 mph for one hour and decides she wants to finish the trip so that she would have flown at an average of 1000 mph. How fast should she go to finish the trip and meet her

    asked by Anonymous
  166. physics

    isolate for f 1/di = 1/f - 1/do show all the steps pls

    asked by samuel
  167. math

    what was the answer that i posted to you about if you subtract the tens digit from the ones digit.

    asked by madeline
  168. english

    Research skills are primarily valued for which of the following reasons

    asked by davis
  169. phi 103

    Don’t you dare vote for universalized healthcare. (Points : 1) Proposition Non-proposition

    asked by sam
  170. Math

    Solve the system of linear equations by substitution: 1.) y=2x+3 y=3x+5 2.) y=1/3x+2 y=1/6x+4

    asked by Janey
  171. math

    I'm trying to work on this practice question But got confuse on this question: find the value of P = Q ( 1 - 1.03^-20 / 0.03) where Q is 1000 to the nearest whole number? Thank you =)

    asked by Luc
  172. Ecology

    under what conditions might phenotypic plasticity not evolve and why

    asked by Bri
  173. Science

    What are some effects of predation?

    asked by Student