Questions Asked on
June 5, 2013

  1. math

    A radio station's signal has a radius of 100 miles. If you drive at a constant speed of 40 miles an hour, nonstop, directly across the diameter of the signal, how long can you listen to the station before the signal fades?

    asked by dell
  2. Chemistry

    Automobile air bags employ a chemical reaction involving the rapid decomposition of sodium azide (NaN3) into sodium metal and nitrogen gas to inflate in a collision. How much sodium azide is required to decompose to inflate a 20.0 L air bag? Assume that

    asked by Anonymous
  3. Physics

    Two wires are identical, except that one is aluminum and one is copper. The aluminum wire has a resistance of 0.835. What is the resistance of the copper wire? Take the resistivity of copper to be 1.72 x 10-8 Ω·m, and that of aluminum to be 2.82 x 10-8

    asked by Tim
  4. Maths

    Hi, I am just doing some maths revision in light of my maths GCSE resit, which is very soon. I am sitting the higher paper for the first time, so some of the questions towards the end of the paper are very testing of my knowledge. At the moment I am going

    asked by Sam
  5. chemistry

    As pure elements. all of the halogens are diatomic molecular species. their melting points are: F2, 85 K, Cl2 239 K, Br2 332 K, and I2 457 K. using periodic table, how can i predict the molecular formula of elemental astatine. at the only radioactive

    asked by niki
  6. Math - Decimals

    Is 0.052 or 0.05 a bigger number?

    asked by Jess
  7. Chemistry

    If iridium has a density of 23.3 g/cm3 and forms a face-centered cubic lattice, what is the atomic radius of the iridium atom? a. 135.7 pm b. 203.7 pm c. 271.4 pm d. 648.0 pm

    asked by Anonymous
  8. Physics

    A block of mass m1=1.6kg, initially moving to the right with a velocity of +4m/s on a frictionless horizontal track, colides with a massless spring attached to a second block of m2=2.1kg moving left with a velocity of -2.5m/s. The spring constant is 600

    asked by Andrea
  9. Math

    2 cm green square is painted on a triangle with a base of 6 and a height of 7. A dot will be randomly placed on the triangle. What is the probability the dot will be placed outside of the square?

    asked by Bianca
  10. physics

    A solid sphere of mass 2 kg is rolling without slipping on a table with linear speed of 0.5 m/s. Calculate its total kinetic energy.

    asked by Anonymous
  11. Math

    John ran 600 meters at baseball practice.How many centimeters did he run?

    asked by ttuuffyy
  12. physics

    consider the 52 kg climber. find the tension in the rope and the force that the climber must exert with her feet on the vertical rock face to remain stationary. assume that the force is exerted parallel to her legs. also, assume negligible force exerted by

    asked by kim
  13. Thermodynamics

    An empty cannister of 0.002 m3 is filled with R-134a from a line flowing saturated liquid R-134a at 0°C. The filling is done quickly so it is adiabatic, but after a while in storage, the can warms up to room temperature, 20degC. Find the final mass in the

    asked by Kyle
  14. Math

    A spinner with three equal spaces (labeled A,B, and C) is spun. If the spinner lands on A or C a coin is flipped. If the spinner lands on B a standard 6-sided dice is rolled. What is the probability of spinning a B and rolling a prime?

    asked by Jennyy
  15. Chemistry

    Which of the following electron configurations belongs to an atom that is most likely to be involved in a covalent bond? a. 1s22s22p63s2 b. 1s22s22p6 c. 1s22s22p63s23p3 d. 1s22s22p63s23p6

    asked by Anonymous
  16. language arts

    compare and contrast the giver and the truman show

    asked by sue
  17. Chemistry

    Limestone (CaCO3) emits CO2 gas when exposed to HCl. What is the theoretical yield of CO2 if 56.1 grams of limestone is completely dissolved in HCl? CaCO3(s) + 2 HCl(aq) R CaCl2(aq) + CO2(g) + H2O(l) a. 21.5 g b. 4.16 g c. 9.53 g d. 24.7 g

    asked by Anonymous
  18. wilson

    Andrea is as talented as any person I know.

    asked by Anonymous
  19. Math

    12+12=9 25+25=49 18+18=81 29+29=???????

    asked by T.Reed
  20. Chemistry

    How long will it take to collect 1.0 L of H2(g) at STP in the electrolysis of 2.0 M HCl with a current of 4.25 A? a. 15 min b. 34 min c. 2.8 hr d. 11 hr

    asked by Anonymous
  21. physics

    A tennis ball is flying horizontally across the net. Air resistance is not negligible. Identify the forces on the ball

    asked by Khadija
  22. HELP!!! Math

    If a varies jointly as b and the square root of c, and a = 21 when b = 5 and c = 36, find a when b = 9 and c = 225.

    asked by Jnr John
  23. Math>> Help!!

    Seats for Mathematics, Physics and Biology in a school are in the ratio 5:7:8. There is a proposal to increase these seats by 40%, 50% and 75% respectively. What will be the ratio of increased seats?

    asked by Jnr John
  24. math

    Mike,Liz,and Danna are friends.They each measured the length of the sidewalk in front of their school for a project.Which friend do you think measured incorrectly? Mike -measured 280 inches Liz measured 24 ft. Danna measured 8 yards

    asked by ttuuffyy
  25. Physics

    A winch is capable of hauling a ton of bricks vertically two stories (6.50 ) in 22.5 If the winch’s motor is rated at 5.00 , determine its efficiency during raising the load.

    asked by Anonymous
  26. math

    Barbara Sultan works 40 hours per week as a registered nurse. At the rate of $31.50 per hour, what are her gross weekly earnings

    asked by Beth
  27. english

    What grammatical structure is the italicized portion of the sentence? By serving as a popcorn vendor, Don saw many good games. present participial phrase nominative absolute appositive past participial phrase prepositional phrase with a gerund

    asked by Chris
  28. economics

    how managerial economics is related with economics?

    asked by namrata
  29. science

    The latent heat of vaporization of water is 540 calories/gram. How many calories are required to completely vaporize 500 grams of water?

    asked by Quan
  30. Chemistry

    A "neon" sign contains 2.4¡Ñ10^2mL of argon. Assuming that the gas is at standard temperature and pressure, there is 1.00 moles of gas per 22.4 L of volume. How many argon atoms are present in this sign?

    asked by Anonymous
  31. Math

    A spinner with three equal spaces (labeled A,B, and C) is spun. If the spinner lands on A or C a coin is flipped. If the spinner lands on B a standard 6-sided dice is rolled. What is the probability of spinning a B and rolling a prime?

    asked by Jennyy
  32. Please Help!! Math

    If c varies directly as the square root of d, and c = 14 when d = 64, find c when d = 324.

    asked by Jnr John
  33. HELP!!! Math

    The volume of a pyramid varies jointly as its height and the area of its base. A pyramid with a height of 12 feet and a base with area of 23 square feet has a volume of 92 cubic feet. Find the volume of a pyramid with a height of 17 and a base with an area

    asked by Jnr John
  34. Chemistry

    Which of the following electron configurations belongs to an atom that is most likely to be involved in a covalent bond? a. 1s^22s^22p^63s^2 b. 1s^22s^22p^6 c. 1s^22s^22p^63s^23p^3 d. 1s^22s^22p^63s^23p^6

    asked by Anonymous
  35. Chemistry

    What is the molecular geometry of PCl3 a. trigonal pyramidal b. see-saw c. tetrahedral d. T-shape

    asked by Anonymous
  36. math

    Two runners are competing in a race. One runner averages a pace of 7 minutes per mile and finishes the race in 28 minutes. The second runner finishes the race in 30 minutes. Which of the following is the pace of the second runner?

    asked by lifesaver2
  37. Please Help!! Math

    Wind resistance varies jointly as an object's surface area and velocity. If an mile per hour with a surface area of 25 square feet experiences a wind resistance of 225 Newtons, how fast must a car with 40 square feet of the surface area travel in order to

    asked by Jnr John
  38. Chemistry

    As an electron moves closer to the nucleus, energy is: a. absorbed b. released c. remains unchanged d. transformed into a proton

    asked by Anonymous
  39. Chemistry

    Large jumps in ionization energy tend to occur whenever the removal of that electron disrupts an electron configuration ending in: a. ns^2 b. ns^1 c. np^6 d. np^4

    asked by Anonymous
  40. math

    If RS=8y+4, ST=4y+8, and RT=36, find the value of y.

    asked by Chris
  41. Engineering

    A tapered thin-wall circular shaft has constant wall thickness, t, length L, and diameters linearly varying between dA at the support A(x=0) and dB at its free end B(x=L). The shaft is homogeneous with shear modulus G HW6_1A : 20.0 POINTS Obtain a symbolic

    asked by Sat
  42. Biology

    Describe how you would prepare 10 mL each of 2 M, 1.5 M, and 1 M NaCl solutions from a 2 M stock NaCl solution. Describe your actions–exactly what you would do –step-by-step–when preparing this solution. Also show all calculations. Be sure all

    asked by Maria
  43. math

    Which is the best estimate for the length of a house? A.12 yards B.12 feet C. 12 miles D.12 inches

    asked by ttuuffyy
  44. Chemistry

    Large jumps in ionization energy tend to occur whenever the removal of that electron disrupts an electron configuration ending in: a. ns2 b. ns1 c. np6 d. np4

    asked by Anonymous
  45. math

    Mitch Anderson is a security guard. He earns $7.45 per hour for regular time up to 40 hours, time-and-a-half for overtime, and double time for the midnight shift. If Mitch worked 56 hours last week, including 4 hours on the midnight shift, how much were

    asked by Beth
  46. math

    how much water is needed to add to a half-pint of syrup with 60% sugar to obtain a drink with 5% sugar?

    asked by Deidre
  47. Reading Activity

    1. The old couch needed some new upholstery. What does the word upholstery mean in the sentence above? (1 point) fabric curtains pillows*** legs 2. The pet owner had many feline companions. What does the word feline mean in the sentence above? (1 point)

    asked by Gabby
  48. Physics

    1. A car is traveling at 85km/h, find the following: A) Its speed in m/s u = 85km/h = 85km/h * 1000m/km/ 60s/min * 60min/m/h = 85000/ 3600 = 23.61 ANS = 23.61m/s B) How many meters will it travel in 8 seconds = 23.61m/s * 8s ANS = 188.88m C) How long (in

    asked by DANNY
  49. Algebra

    A $130,000 home bought with a 20% down payment and the balance financed for 30 years at 7.5% Find the monthly payment for the loan

    asked by Becky
  50. Physics

    A 1.40- block is on a frictionless, 20 inclined plane. The block is attached to a spring ( = 40.0 ) that is fixed to a wall at the bottom of the incline. A light string attached to the block runs over a frictionless pulley to a 60.0- suspended mass. The

    asked by Anonymous
  51. Science

    Solar panels turn ___ energy into __ energy heat into electric?

    asked by Jerald
  52. statistics

    Suppose that 30% of all telephone calls at work are for personal reasons. If a random sample of 15 is taken, let X be the number of personal calls. The standard deviation of the # of personal calls is:

    asked by Anonymous
  53. life orientation

    Identify one enviromental or human factor that causes ill health or accidents within your community

    asked by kim
  54. Movie Essay Topic Help?

    Hi, I need to write a essay/narrative/anyotherstyleofessay for the movie "Lean on Me" with Morgan Freeman. I was wondering, if any of you guys have seen it, what would be a good topic to write about? Thanks

    asked by Michael
  55. Physics

    7) An apple falls from a tree (h = 9m). In the absence of air resistance, how fast is it traveling when it strikes the ground?

    asked by Mark
  56. Calculus

    Use Green's theorem to evaluate the integral: y^(2)dx+xy dy where C is the boundary of the region lying between the graphs of y=0, y=sqrt(x), and x=9

    asked by Elyse
  57. PHI 208

    Many philosophers insist that our most strongly held beliefs should be examined and critically evaluated. Using the required text and outside sources, explain what philosophers mean when they say that beliefs need justification? What is the importance of

    asked by lisa
  58. Business

    If a family planned to spend $370 for food during March but only spent $344, this difference would be referred to as a:

    asked by Henry
  59. accounting

    On November 30, the payroll register of Webster & Smith indicated the following information: Determine the amount of Social Security and Medicare taxes to be withheld. Round your answers to one decimal place. Social Security Tax=$ Medicare Tax=$136,30 I

    asked by Trish
  60. CHEMISTRY PLEASE HELP

    Cobalt was used as an internal standard to analyze a sample of titanium with atomic absorption spectroscopy. A mixture was prepared by combining a 4.00 mL Ti solution of unknown concentration with 3.00 mL of a 11.7 micrograms/mL solution of Co. The atomic

    asked by ScienceGeek
  61. HELP!!! Math

    The weight of an object on Earth varies directly as the weight of the same object on the moon. A 300 pound object would weight 48 pound on the moon. How muchg would a 65 pound object weigh on the moon?

    asked by Jnr John
  62. algebra

    For how many pairs of positive integers n and k with n and k less than or equal to 20, is the number (2n)!(2k)!n!k!(n+k)! an integer?

    asked by arjit
  63. HELP!!! Math

    Given the relation A = {(5,2),(7,4),(9,10),(x,5)}. What is the value of x that will make relation A a function?

    asked by Jnr John
  64. Chemistry

    What is the pH of a 0.200 M solution of HNO3? a. 0.70 b. 1.31 c. 6.18 d. 8.53

    asked by Anonymous
  65. Chemistry

    A "neon" sign contains 2.4¡Ñ102mL of argon. Assuming that the gas is at standard temperature and pressure, there is 1.00 moles of gas per 22.4 L of volume. How many argon atoms are present in this sign? a. 6.5¡Ñ10^21 b. 2.8¡Ñ10^22 c. 3.2¡Ñ10^24 d.

    asked by Anonymous
  66. BUSINESS

    The sales department tells management that they can increase revenue by 20 percent by increasing sales 20 percent, but the production department says that to achieve that number of units, they will have to buy a new piece of equipment that will add

    asked by LUCY
  67. math

    Find the sum of all positive integers m such that 2^m can be expressed as sums of four factorials (of positive integers). Details and assumptions The number n!, read as n factorial, is equal to the product of all positive integers less than or equal to n.

    asked by anonymous
  68. calculus

    A conical party hat made out of cardboard has a radius of 4cm and a height of 12cm. When filled with beer, it leaks at the rate of 4cm^3/min. (a)At what rate is the level of the beer failing when the beer is 6cm deep? (b) When is the hat half empty?

    asked by kristina
  69. Physics

    A block of weight 30N lies on a horizontal table top. A force of 40N acts parallel to the surface of the table top, but does not cause the block to move. What is the magnitude of the frictional force between the block and the table?

    asked by Ashley
  70. Precalculus

    Given f(x)=(2x+3)/(3x^2+7x-6) find the equations of any vertical, horizontal, or oblique asymptotes.

    asked by Jay
  71. Math

    A 20 foot ladder is leaning against a building. If the ratio of the base of the ladder's distance from the building to its top's height from the ground id 3:4, find how high the top of the ladder is from the ground.

    asked by Seth
  72. Math

    The area of a trapezium is 360 in2. If the ratio of the bases to the height is 6:10:5, find the dimensions of the trapezium.

    asked by Seth
  73. chemistry

    briefly explain the problem that will be created if you (a) mark the origin line with a washable flet-tip markromatogram until after you discover that the solvent front has reached the top of the paper.

    asked by mary
  74. Math>> Help!!

    A 20 foot ladder is leaning against a building.If the ratio of the base of the ladder's distance from the building to its top's height from the ground is 3:4, find how high the top of the ladder is from the ground.

    asked by Jnr John
  75. HELP!!! Math

    The area of a trapezium is 360 in^2. If the ratio of the bases to the height is 6:10:5, find the dimensions of the tarpezium.

    asked by Jnr John
  76. math

    Express (15x^2+5x+2)/(2-x)(1+2x^2) in partial fractions.

    asked by Regina
  77. math

    Express (15x^2+5x+2)/(2-x)(1+2x^2) in partial fractions.

    asked by Regina
  78. math

    Express (15x^2+5x+2)/(2-x)(1+2x^2) in partial fractions.

    asked by Regina
  79. science,

    1,3,5,2 ORDER IT

    asked by ENYEW
  80. heeeeeeeeeeeelp physics

    Estimate the time difference between the longest day and the shortest day of a year in seconds if you lived on the Earth's equator with the assumptions below. Note: this is not the difference between solstices as we are adjusting the earth's rotation axis

    asked by clavin
  81. calculus 2

    Test the series for convergence/divergence. The Summation from n=1 to infinity of: 1*3*5...(2n-1)/(2*5*8...(3n-1) I'm not sure what to do with the extra terms on the left.

    asked by Jane
  82. English

    Which of the following APA citations for a book with one author is correct? A. Percy, William Byrnes (1961). The Moviegoer. New York: Knopf. B. Percy, W. (1961). The Moviegoer. New York: Knopf. C. Percy, W., 1961. The Moviegoer. New York: Knopf. D. Percy,

    asked by Amy
  83. Math Trigonometry

    What is the maximum integer value of n, where n

    asked by Crow
  84. Physics/Mechanics

    tapered thin-wall circular shaft has constant wall thickness, t, length L, and diameters linearly varying between dA at the support A(x=0) and dB at its free end B(x=L). The shaft is homogeneous with shear modulus G HW6_1A : 20.0 POINTS Obtain a symbolic

    asked by MAN
  85. Foreign Language Translation French

    Le garcon n'a pas de stylo- does this mean "the boy does not have a pen?"

    asked by Anonymous
  86. fundamentals

    Calculate the total constant force needed to accelerate a vehicle with mass 1400kg and tractive resistance of 320N from 19km/h to 95km/h over a distance of 0.8km on a horizontal plane.show working?

    asked by David
  87. College Algebra

    When using the Quadratic formula, why is only necessary to examine the discrimant to determine if the equation only has real numbers?

    asked by Jennifer
  88. english

    Hey you :) Can you please read that letter to my host family? Can you maybe give me tips what I can add? what I don't have to say? And look up the grammar? Thank you Minnie Dear Host Family, My name is Minnie. I’m 21 years old, my birthday is on 2nd

    asked by Minnie
  89. College Algebra

    Suppose that the Quadratic equation had two X-intercepts. How could you use the intercepts to find the vertex?

    asked by Jennifer
  90. Pre-Calculus

    How to write this conic section in standard form? 3y^2 = 108 - 12x^2

    asked by B
  91. Pre-Calculus

    How to write this conic section in standard form? 3y^2 = 108 - 12x^2

    asked by B
  92. Math

    Determine 208/207+(208/207×206/205)+(208/207×206/205×204/203)+..+(208/207×206/205×204/203..4/3*2/1)

    asked by Clavin
  93. Math

    A rectangle has a length that is 1 less than twice its width. It's area is 21. Find its perimeter.

    asked by Bentley
  94. chemistry

    Whadetermines the behavior of an amphoteric compound?

    asked by noya
  95. Math

    Mr foster places 11 garden lights along an 80 meter path. Each light is placed an equal distance apart. How far away is the sixth garden light from the second?

    asked by Karen
  96. math

    Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.33 10−5watts/cm2

    asked by tekeria
  97. Math - Factorising

    Find the quotient and the remainder in the following. a). x^4 + 3x^3 + 5x^2 - 6x - 8 is divided by x + 2 b). 2x^4 - 3x^3 + 6x^2 - 5x - 4 is divided by 2x - 3 Please help, this is urgent. Thanks.

    asked by OHara
  98. math

    For a positive integer x, let f(x) be the function which returns the number of distinct positive factors of x. If p is a prime number, what is the minimum possible value of f(75p2)?

    asked by raja harishchandra
  99. Maths - factorising

    Find the quotient and remainder in the following: a) x^4 +3x^3 + 5x^2 - 6x - 8 is divided by x + 2

    asked by OHara
  100. math

    How many ordered pairs of positive integers 1≤k≤n≤50 are there, such that k divides n, and (n/k)!=n!/k!?

    asked by raja harishchandra
  101. HELP!!! Math

    The area of a yard is 15000 ft^2. If the ratio of the lenght to the width of the yard is 3:2, what are the dimensions of the yard?

    asked by Jnr John
  102. math

    Express (15x^2+5x+2)/(2-x)(1+2x^2) in partial fractions.

    asked by Regina
  103. math

    Express (15x^2+5x+2)/(2-x)(1+2x^2) in partial fractions.

    asked by Regina
  104. math

    Express (15x^2+5x+2)/(2-x)(1+2x^2) in partial fractions.

    asked by Regina
  105. HELP!!! Math

    If y varies jointly as x and z, and y = 33 when x = 9 and z = 12, find y and x = 16 and = 22.

    asked by Jnr John
  106. maths

    Determine 208/207+208/207×206/205+208/207×206/205×204/203+…

    asked by rohit
  107. algebra

    For a positive integer x, let f(x) be the function which returns the number of distinct positive factors of x. If p is a prime number, what is the minimum possible value of f(75p2)?

    asked by arjit
  108. help math!

    A curve has equation: 3siny + 4cosy = xy + x^2 Q:find dy/dx in terms of x and y.

    asked by Ying
  109. Chemistry

    Name each compound. /\/\NH2 (that's suppose to be a line diagram...) I got 1-pentanamine, but that's wrong. CH3CH2-O-CHCH2CH3 .....................| ..................CH3 I'm not sure how great this will turn out, but there's supposed to be a CH3 branching

    asked by a Canadian
  110. Calculus

    4. Find the volume of a pyramid of height 160 feet that has a square base of side 300 feet

    asked by Maryam
  111. Biology

    What are the three main type of producers?

    asked by Anonymous
  112. Math

    Which of the following holds about 1 liter of water spoon,glass ,pot, or eye dropper?

    asked by ttuuffyy
  113. heeeeeeeeeeelp math

    The integers from 1 through 10 (inclusive) are divided into three groups, each containing at least one number. These groups satisfy the additional property that if x is in a group and 2x≤10, then 2x is in the same group. How many different ways are there

    asked by clavin
  114. plllllllllls help math

    ABCD is a convex quadrilateral with AC and BD intersecting at E. F is a point on AD such that EF is parallel to CD. It is given that the circumcircle of triangle AED is tangential to DC. If FD=336 and FA=420, what is ED?

    asked by clavin
  115. math pls hurry

    A car travels 60 km in 1hr 30min.how long will it take to cover a distance of 100km at the same speed?

    asked by vaibhav
  116. heeeelp math

    For each positive integer n, let Hn=1/1 + 1/2 +⋯+ 1/n . If ∑ (up)∞ (base)(n=4) 1/n*Hn*H(n-1)= a/b for relatively prime positive integers a and b, find a+b.

    asked by clavin
  117. Chemistry

    How many liters of nitric acid are needed to neutralize 25mL of 4.2M calcium hydroxide?

    asked by Anonymous
  118. Pre-calculus

    Explain how the graph of f(x)=(-2)/(x-3)^2 can be obtained from the graph of y=1/x^2 by means of translations, compressions, expansions, or reflections.

    asked by Gina
  119. chattco

    Dave's age in 4 years is 18. Write an equation that represents Dave's age in 4 years. Use the variable, d, to represent Dave's age

    asked by ian
  120. Chemistry

    A "neon" sign contains 2.4¡Ñ10^2mL of argon. Assuming that the gas is at standard temperature and pressure, there is 1.00 moles of gas per 22.4 L of volume. How many argon atoms are present in this sign? a. 6.5¡Ñ1021 b. 2.8¡Ñ1022 c. 3.2¡Ñ1024 d.

    asked by Anonymous
  121. Chemistry

    A "neon" sign contains 2.4¡Ñ10^2 mL of argon. Assuming that the gas is at standard temperature and pressure, there is 1.00 moles of gas per 22.4 L of volume. How many argon atoms are present in this sign? (a). 6.5¡Ñ10^21 (b). 2.8¡Ñ10^22 (c).

    asked by Anonymous
  122. Science

    7) An apple falls from a tree (h = 9m). In the absence of air resistance, how fast is it traveling when it strikes the ground?

    asked by Mark
  123. math

    If you begin with 3000 fish in a pond and 20% die off each year, yet 1000 more are added each year, how many would you end up with at the end of 10 years?

    asked by Susan
  124. math

    A whole number which will divide exactly into another whole number.

    asked by kina
  125. Math Polynominal

    The following three sets A,B and C satisfy A ⊂ B and C ⊂ A: A={x∣(x−3)(x^2−20x+75)>0}, B={x∣x>α}, C={x∣x>β}. If the maximum value of α is a and the minimum value of β is b, what is the value of a+b?

    asked by Crow
  126. Chemistry - DrBob222

    When sodium burns in air it produces a bright white light and heat energy 2Na + O2 2Na2O ?H = -414kJ/mol What would you expect to be the heat energy associated with the reverse process 2Na2O 2Na + O2 Can you please show the entire calculation with units

    asked by Timofey
  127. fundamentals

    A playground has its highest point 2.2m above the lowest point, and the slide is 4.9m long. If the average resistance to motion is one-fifth of the weight of the child(mass 40kg), find the speed at which the child reaches the bottom show working?

    asked by David
  128. Physics

    1. A train traveling at a speed of 150km/h decelerates for 15 seconds. During that time it travels 400 meters. A) What is the acceleration? = m/s^2 B) What is its speed after deceleration? = km/h I need help with which formula to use and how to use it to

    asked by DANNY
  129. math

    (a)Given the points P(3,5),Q(8,10)and R(8,0),find the equation of a line which is perpendicular to QR and passes through the mid point of QR. (b)The line 2x+3y=2 and 7x-3y=10 intersect at A . Find the equation of the line which passes through A and is

    asked by JOJO
  130. chemistry

    if a 10 mL of the original 1.0M stock solution was added to a 500mL volumetric flask and diluted to the mark, what would be the new concentration?

    asked by Anonymous
  131. physics

    A car moving with a velocity of 24meters per seconds,acceleration for 15seconds at a rate of 1meter per second square,calculate the final velocity of the car

    asked by Henry
  132. PLIZ VERY URGENT

    Use implicit differentiation to show that a function defined implicitly by sin x + cos y = 2y has a critical point whenever cos x = 0. Then use the first derivative test to classify those critical numbers that lies in the interval (−2, 2) as relative

    asked by Anonymous
  133. Geometry

    To the nearest inch, what is the diameter of a minipizza if two minis have the same area as one 16-inch pizza?

    asked by Anonymous
  134. Math

    The ratio of the length of an altitude of an equilateral triangle to its base is A. 1:1 B. 1:2 C. 1:3 D. Square root of 3: Square root of 2 E. None of these

    asked by Anonymous
  135. Pre-calculus

    Given f(x)=6x^4-7x^3-23x^2+14x+3, approximate each real zero as a decimal to the nearest tenth.

    asked by Jen
  136. ELA

    I have an 89, 83, 82, and 74 for school year. I got a 59 on final which is worth 20%. what is my average?

    asked by brendan
  137. Math

    The area of a yard is 15000. If the ratio of the length to the width to the depth is 4:2:1, what are the dimensions of the pool?

    asked by Seth
  138. Math

    Given three vertices (3,5), (0,0), and (6,0). Which of the following could be the fourth? A (3,-5) B (9,5) C (-3,5) D (-3,-5)

    asked by Anonymous
  139. probabilities

    What is the probability of obtaining tails or a five

    asked by Anonymous
  140. Math

    Factorise : 1 + a + b + c + ab + bc + ca + abc

    asked by Roy
  141. calculus

    What is the antiderivative of. 3X/x^2?

    asked by Mary
  142. math

    Find the sum of all positive integers m such that 2^m can be expressed as sums of four factorials (of positive integers).

    asked by raja harishchandra
  143. math

    The integers from 1 through 10 (inclusive) are divided into three groups, each containing at least one number. These groups satisfy the additional property that if x is in a group and 2x≤10, then 2x is in the same group. How many different ways are there

    asked by raja harishchandra
  144. Please Help!! Math

    The volume of a pool is 1728 ft^3. If the ratio of the lenght to the width to the depth is 4:2:1, What are the dimensions of the pool?

    asked by Jnr John
  145. math

    The integers from 1 through 10 (inclusive) are divided into three groups, each containing at least one number. These groups satisfy the additional property that if x is in a group and 2x≤10, then 2x is in the same group. How many different ways are there

    asked by raja harishchandra
  146. Math>> Help!!

    If y varies as x, and x = 9 when y = 15, find y when x = 33.

    asked by Jnr John
  147. maths

    Find the smallest number N such that: The number of divisors of N is A. The number of divisors of A is B. The number of divisors of B is C. The number of divisors of C is 3.

    asked by rohit
  148. Geometry

    Triangle ABC has side lengths AB=8, BC=12 and CA=14. Given that D, E and F are midpoints of BC, CA and AB, respectively. Find the value of AD^2+BE^2+CF^2.

    asked by Shin
  149. Math>> Help!!

    A sum of money is to be distributed amoung A,B,C,D in the proportion of 5:2:4:3. If C gets K1000 more than D, waht is B's share?

    asked by Jnr John
  150. Calculus

    (c) find the integral of e^x/ e^3x + e^x dx

    asked by Maryam
  151. Calculus

    (c) find the integral of 1/squrt (x^2+2x+10) dx

    asked by Maryam
  152. Calculus

    Find the integral of sin(x) cos(x)/sin^2(x)-4 dx

    asked by Maryam
  153. Physics

    All answers should be in degrees. (a) Using the result of Lecture 31 Question 3, and Snell's law, derive and evaluate for the secondary rainbow for the following values of the incidence angle and index of refraction . 1 , 1.4 incorrect 45 , 1.3 incorrect

    asked by P
  154. Calculus

    (c) y=x2,y=2−x,and the vertical linex=2

    asked by Maryam
  155. Calculus

    3. Find the volume of the solid with cross-sectional area A(x) = 10 e^0.01x, 0 ≤ x ≤ 10.

    asked by Maryam
  156. Calculus

    5. Find the volume of the solid generated by revolving the region bounded by y = x2, y = 0 and x = 1 about (a) the x-axis (b) the y-axis

    asked by Maryam
  157. English

    To “elide” text is to ___________ text. A. plagiarize B. misspell C. omit D. verify is it C

    asked by Amy
  158. estimate with whole nubers

    Susie has a part-time job at the video store. She makes between $40.00 and $47.00 a day. Which is a reasonable amount of money that Susie makes for working 6 days?

    asked by Anonymous
  159. heeeeeeeeeeelp math

    Calvin and Dan are playing a game of chance. Calvin tosses 8 fair coins, and wins if he obtains at least 4 heads. The probability that Calvin wins can be expressed as a/b where a,b are coprime positive integers. What is the value of a+b?

    asked by clavin
  160. math

    The ratio of girls to boys in a class is 2:3, and you know there are 6 girls, how many boys are in the class?

    asked by mary
  161. Math

    If the total expenditure was 2.5 million euros determine: 1) cost of administration (which is 20%): i did 20x2.5 million divided by 100 2) by how much thr expenditure on production (30%) exceeded that of selling (25%)

    asked by Katherine :))
  162. Chemistry

    The ratio of isotopes for a given element can be measured instrumentally using a(n) ____________________.

    asked by Anonymous
  163. Grammar

    I want to give my Algebra teacher a letter to show how much her effort on helping me learn made me appreciate her and I just want to know if this sounds okay. Dear (my teacher's name), I just wanted to take some time to express how much I enjoyed being in

    asked by Angie
  164. Math Trigonometry

    Let f(x)=cos(pi*x/3) g(x)=1^x+(−1)^x h(x)=f(x)⋅g(x) where x is a positive integer. Given that h(x) has a range of exactly 3 different values: a, b and c, what is the value of a^2+b^2+c^2?

    asked by Crow
  165. Chemistry

    The lower the pH of a weak acid, the: a. higher the concentration of the weak acid. b. higher the dissolved H2(g) concentration. c. higher the Ka of the acid. d. none of the above

    asked by Anonymous
  166. Chemistry

    The ratio of isotopes for a given element can be measured instrumentally using a(n) ____________________.

    asked by Anonymous
  167. Approapriate logos

    For my school field day, I have to wear a white shirt and it can have logos or pictures. My shirt has the words "God save england" is that approapriate?

    asked by Celest
  168. Math

    can any one add or subtact this (m^2 - m - 4) + (m - 5)

    asked by William
  169. Chemistry

    When sodium burns in air it produces a bright white light and heat energy 2Na + O2 2Na2O ?H = -414kJ/mol What would you expect to be the heat energy associated with the reverse process 2Na2O 2Na + O2 Can you please show the entire calculation with units

    asked by Timofey
  170. BT

    What's the shortcut of sane in stenography?

    asked by Brit
  171. Math

    solve and find value of A,B,C and D. 4 + C = 5 + A*D C = 3 + 3*D -7 - C = 6 + B*D

    asked by Ying