Most popular questions and responses by Jane
  1. 8need a function rh grade math

    a 154 lb person burns 420 calories per hr riding an exercise bike at 15 mph. Need a function rule to represent the total calories burned over time.

    asked on May 14, 2013
  2. Math

    There are 12 more toy cars than toy trucks in a toy box with a total of 38 toy cars and trucks. How many toy trucks are in the toy box?

    asked on July 5, 2016
  3. English

    8. which of the following quotes from "the morning of june 281948" best describe the aversion that the public felt toward Shirley Jackson's short story "The lottery" a. "as a matter of fat when I read it over later I decided that except for one or two

    asked on May 19, 2016
  4. physics

    At a picnic, there is a contest in which hoses are used to shoot water at a beach ball from three directions. As a result, three forces act on the ball, F1, F2, and F3 (see drawing). The magitudes of 1 and 2 are F1 = 55.0 newtons and F2 = 95.0 newtons.

    asked on September 12, 2010
  5. math

    A local citizen wants to fence a rectangular community garden. The length of the garden should be at least 110 ft, and the distance around should be no more than 380 ft. Write a system of inequalities that models the possible dimensions of the garden.

    asked on December 29, 2011
  6. Statistics

    The lengths of pregnancies are normally distributed with a mean of 273 days and a standard deviation of 20 days. If 64 women are randomly selected, find the probability that they have a mean pregnancy between 273 days and 275 days.

    asked on February 10, 2013
  7. physics

    An airplane flies 200km due west from city A to city B and then 305km in the direction of 33.5 degrees north of west from city B to city C. a.) in straight-line distance, how far is city C from city A? b.) relative to city A,in what direction is city C?

    asked on January 28, 2013
  8. physics

    A 0.400 kg ball is shot directly upward at initial speed 40.0 m/s. What is its angular momentum about a point 2.0 m horizontal from the launch point, when the ball is a) at maximum height and b) halfway back to the ground? What is the torque on the ball

    asked on June 13, 2009
  9. arithmetic

    The initial term of an arithmetic sequence is 5. The eleventh term is 125. what is the common difference of the arithmetic sequence?

    asked on October 25, 2011
  10. geometry

    Algebra BD bisects

    asked on September 14, 2012
  11. history

    Which statement about ethnic groups in Southwest Asia is accurate? A. Arabs are the majority in every country in the region. B. Arabs are the largest ethnic group in the region. C. Kurds make up the largest ethnic group on the Arabian Peninsula. D. People

    asked on January 14, 2019
  12. Government

    Explain the principle of checks and balances as it relates to the power of the president. Provide one example to support your explanation.

    asked on September 10, 2018
  13. medicinal chemistry

    the solubility product of PbSO4 at 298K is 1.6x10^-8 mol^2dm^-6. Calculate the solubility of PbSO4 in 0.10mol dm^-3 sulphuric acid.Thanks!

    asked on May 28, 2012

    paid two months rent deposit and one month advance, P40,500

    asked on August 23, 2014
  15. Math

    A surveyor sights two signs and the angle between the two lines of sight measures 55. If the first and the second signs are 70 m and 50 m away,respectively,from the surveyor, find the distance between the two signs .Express your answer to the nearest

    asked on March 5, 2018
  16. Chemistry

    Use the balanced equation for the reaction of lithium oxide with water: Li2O(s) + H2O(g) --> 2LiOH(s) to determine how many grams of H2O can be removed from the air by 250g of Li2O. Show your step-by-step solution with unit conversions.

    asked on September 26, 2018
  17. Alg 1

    Landon is standing in a hole that is 6.5 ft deep. He throws a rock and it goes up into the air, out of the hole, and then lands on the ground above. The path of the rock can be modeled by the equation y = -0.005x^2 + 0.45x - 6.5, where x is the horizontal

    asked on April 16, 2013
  18. physics

    The energy given off by 300 grams of an alloy as it cools through 50°C raises the temperature of 300 grams of water from 30°C to 40°C. The specific heat of the alloy (in cal/g C ) is: i know Q=CpM(delta T) but what is what?

    asked on June 22, 2009
  19. Chemistry

    Consider the following reaction, equilibrium concentrations, and equilibrium constant at a particular temperature. Determine the equilibrium concentration of H2O(g). C2H4(g) + H2O(g) C2H5OH(g) Kc = 9.0 × 103 [C2H4]eq = 0.015 M [C2H5OH]eq = 1.69 M

    asked on December 2, 2014
  20. Alg 1

    What are the approximate solutions of 2x^2 -x + 10 = 0 In working this, I came up with a negative (-79) under the radical sign. Can I take the sq rt of a negative? my choices are: -2, 2.5 -1.97, 2.47 -2.5, 2 No solution I think it is no solution. Is this

    asked on April 15, 2013
  21. social studies

    Which of the following factors is impeding economic growth in India? A. poor infrastructure B. its command economy C. microlending D. outsourcing

    asked on December 23, 2018
  22. math

    Simplify the radical expression by rationalizing the denominator: 2(square root)108 / (square root) 180y Please show me how to set up and how to solve

    asked on March 21, 2012
  23. trig

    ABC is rightangled triangle. AD is the bisector of angle BAC. Angle DAC=15 degrees. X=CD. Find X. I know the answer is 7.1 but do not know how to do the actual sum. Can you please help AB = 23 CM

    asked on May 5, 2011
  24. Math

    Peter has 1200 yards of fencing to enclose a rectangular area. Find the dimensions of the rectangle that maximize the enclosed area?

    asked on December 4, 2012
  25. Math

    Describe how to draw a line that passes through the origin and has a slope of 3/5.

    asked on November 9, 2011
  26. Microeconomics

    The new york times reported that subway ridership declined after a fare increase: " There were nearly four million fewer riders in December 1995, the first full month after the price of a token increased 25 cents to $1.50, than in the previous December, a

    asked on October 21, 2009
  27. physics

    To what temperature must you raise a copper wire, originally at 20.0°C, to double its resistance, neglecting any changes in dimensions? (Does this happen in household wiring under ordinary circumstances?)

    asked on September 13, 2014
  28. chemistry

    A silver ring contains 0.0134 mmol Ag. How many silver atoms does it contain?

    asked on July 2, 2010
  29. Math

    Two ships leave the same port at the same time. One ship sails on a course of 110 degree at 32 mi/h. The other sails on a course of 230 degree at 40 mi/h. Find the distance between them after 2 hours. Express your answer to the nearest mile.

    asked on March 5, 2018
  30. physics

    An object is released from rest and falls in free fall motion. The speed v of the object after it has fallen a distance y is given by v2 = 2gy. In an experiment, v and y are measured and the measured values are used to calculate g. If the percent

    asked on February 5, 2017
  31. math

    what is the answer to did you hear about... on worksheet page 106

    asked on May 15, 2012
  32. Math please help quick

    Which of the following are identities? Check all that apply. (Points : 2) sin2x = 1 - cos2x sin2x - cos2x = 1 tan2x = 1 + sec2x cot2x = csc2x - 1 Question 4. 4. Which of the following equations are identities? Check all that apply. (Points : 2) Question 5.

    asked on January 12, 2014
  33. last calc question, i promise!

    given the curve x + xy + 2y^2 = 6... a. find an expression for the slope of the curve. i got (-1-y)/(x + 4y) as my answer. b. write an equation for the line tangent to the curve at the point (2,1). i got y = (-1/3)x + (5/3). but i didn't any answer for c!

    asked on February 20, 2009
  34. Alg 1

    Simplifying Radicals A gardener is mowing a 20-yd-by-40 yd rectangular pasture using a diagonal pattern. He mows from one corner of the pasture to the cxorner diagonally opposite. What is the length of this pass with the mower? Give your answer in

    asked on April 2, 2013
  35. math

    A carpenter is building rectangular walls for a room addition. The width of a section of wall is two times the height h. Each section has a brace that connects two opposite corners of the section. What is a simplified expression for the length of a brace?

    asked on April 2, 2013
  36. math

    The amount of Jen’s monthly phone bill is normally distributed with a mean of $50 and a standard deviation of $10. Find the 25th percentile. A. About $46.30 B. About $43.30 C. About $43.40 D. about $43.20 I came up with $43.26 which its not a choice.

    asked on April 16, 2015
  37. History/ Civics

    1.How did the capture of Vicksburg, Mississippi, take advantage of a Confederate weakness? A-The Confederacy had few soldiers and relied on its well-trained generals to win battles. B- The Confederacy had few weapons manufacturers and relied on Vicksburg

    asked on April 29, 2015
  38. calc

    i did this problem and it isn't working out, so i think i'm either making a dumb mistake or misunderstanding what it's asking. A particle moves along the x axis so that its velocity at any time t greater than or equal to 0 is given by v(t) = 1 -

    asked on April 2, 2009
  39. chemistry

    One step in the isolation of pure rhodium metal (Rh) is the precipitation of rhodium(III) hydroxide from a solution containing rhodium(III) sulfate According to the following balanced chemical equation: Rh2(SO4)3(aq)+ 6NaOH(aq)→ 2Rh(OH)3(s)+ 3Na2SO4(aq)

    asked on March 14, 2013
  40. Algebra

    Classrooms on one side of the drama building are all numbered with consecutive even integers. If the first room, the room with the smallest classroom number, on this side of the building is numbered x, write an expression in x for the sum of the first five

    asked on September 1, 2017
  41. math

    An artist is going to sell two sizes of prints at an art fair. The artist will charge $20 for the small print and $45 for a large print. The artist would like to sell twice as many small prints as large prints. The booth the artist is renting for the day

    asked on January 4, 2012
  42. Math

    A golfer stands 420ft(140 yd) horizontally from the hole and 50ft above the hole. Assuming the ball is hit with an initial speed of 120ft/s, at what angle should it be hit to land in the hole? Assume the path of the ball lies in a plane.

    asked on March 6, 2014
  43. Math

    3. In the small country of Varia, a bill becomes law only if of the senators approve it. What percentage is ? (1 point) 53% 58% 68% 88% 4. Write the percent 96.55% as a decimal. (1 point) 9655 965.5 0.9655 9.655 5. Liam wants to buy a bicycle that costs

    asked on December 6, 2012
  44. physics

    A truck is pulling a car. FT is the magnitude of the force that the truck exerts on the car FC is the magnitude of the force that the car exerts on the truck Consider the following scenarios independently. 1)The truck is driving with a constant velocity,

    asked on February 13, 2014
  45. math

    a garden 7m by 12m will be expanded by planting a border of flowers,the border will be of the same width around the entire garden and has an area of 92m

    asked on June 18, 2016
  46. Alg 1

    The length of a rectangular prism is four times the width. The height of the prism is 8 ft. If the volume of the prism is 160 ft^3, what is the width of the prism? Round to the nearest tenth of a foot. Please solve and explain. Thanks

    asked on April 6, 2013
  47. Genetics

    A pure-breeding white mouse with a long tail was crossed to pure-breeding pink mouse with a short tail. The F1 progeny were all pink with long tails. These F1 mice were test crossed to white mouse with a short tail. If the gene controlling color and the

    asked on October 24, 2016
  48. Geometry

    Please explain how to work this problem: A pair of earrings has blue wedges that are all the same size. One earring has a 25 degree yellow wedge. The other has a 14 degree yellow wedge. Find the angle measure of a blue wedge. How do the angle measures of

    asked on September 13, 2012
  49. Math

    We are studying pythagorean Theorem. How do I set this up to solve? A jogger goes half a mile north and then turns west. If the jogger finishes 1.3 mi from the starting point, how far west did the jogger go?

    asked on February 15, 2012
  50. physics

    what pressure (in atm) would be exerted by 76g of fluorine gas in a 1.5 litre vessel at -37 degrees Celsius?

    asked on April 26, 2013
  51. chemistry

    How many moles of carbon monoxide are needed to react completely with 1.75 moles of iron oxide? based on this equation: Fe2O3(s)+3CO(g)--->2Fe(s)+3CO2(g)

    asked on April 11, 2011
  52. Physics

    A current of 60 mA passes through a loudspeaker of resistance 6 Ω. What is the potential difference across the resistance of the loudspeaker? 36.0 V 10.0 V 0.36 V 0.10 V Answer B seems like it would be the obvious answer..

    asked on October 22, 2012
  53. Geometry

    If U is between T and B, find the value of x and the measure of TU. TU=4x-1, UB=2x-1, TB=5x Please help!

    asked on February 4, 2011
  54. Math

    A copy center offers its customers two different pricing plans for black and white photocopies of 8.5 in. by 11 in. pages. Customers can either pay $0.08 per page or pay $7.50 for a discount card that lowers the cost to $0.05 per page. Which equation can

    asked on January 5, 2012
  55. Chemistry

    If 1.50 g of H2C2O4 2H2O were heated to drive off the water of hydration, how much anhydrous H2C2O4 would remain? Thank you! Please explain clearly.

    asked on December 19, 2013
  56. Chemistry

    How much energy is needed to convert 90g of water (ice) at -85 degrees C to water (liquid) at 48 degree C?

    asked on March 28, 2012
  57. Trigonometry- Application of Sine and Cosine Law

    Q: A 4m flag pole is not standing up straight. There is a wire attached to the top of the pole and anchored in the ground. The wire is 4.17m long. The wire makes a 68 degree angle with the ground. What angle does the flag pole make with the wire? Show all

    asked on February 12, 2019
  58. math

    100 meters of fencing is available to enclose a rectangular area next to a river .Give a function that can represent the area that can be enclosed in terms of X

    asked on June 28, 2016
  59. chemistry

    At 90C the following equilibrium is established H2(g) + S(s) = H2S(g) Kc= 6.8x10^-2 If 0.17 moles of H2 and 0.4 mole of Sulfur are heated in a 1L vessel up to 90C, what will be the partial pressure of H2S at equilibrium? Dr. Bob, first is 0.32 atm correct?

    asked on February 26, 2018
  60. American Government

    The federal government sets requirements that all public schools must follow, while state governments set standards listing what students need to learn. This is an example of what constitutional system? A. dual federalism B. cooperative federalism C.

    asked on November 26, 2016
  61. Math

    Please explain in detail how to solve this: During one year, about 163 million adults over 18 years old in the U. S. spent a total of about 93 billion hours online at home. On average, how many hours per day did each adult spend online at home? How do you

    asked on January 5, 2012
  62. Organic chemistry

    Suggest an appropriate reducing reagent for the following substrates and predict the product of the reaction: a) 2-hexanone b) ethyl 4-nitrobenzoate (reduction of the nitro group) c) hexanal

    asked on February 7, 2009
  63. interest

    Bryan invests $500 in an account earning 4% interest that compounds annually. If he makes no additional deposits or withdraws, how much will be in the account: About how long would it take to double his $500 investment? Round to one decimal place.

    asked on April 10, 2016
  64. math

    Please show me how to solve: At the local ballpark, the team charges $5 for each ticket and expects to make $1,300 in concessions. The team must pay its players $1,800 and pay all other workers $1,500. Each fan gets a free bat that costs the team $3 per

    asked on December 29, 2011
  65. physics

    A body at rest is given an initial uniform acceleration of 8m/s2 for 30s after which the acceleration is reduced to 5m/s2 for the next twenty seconds. The body maintains the speed attained for 60s, after which it is brought to rest in 20s. 1. Draw the

    asked on August 28, 2011
  66. Math

    Pythagorean Theorem A rectanglar box is 9 in. wide, 11 in. tall, and 20 in. long. What is the diameter of the smallest circular opening through which the box will fit? If necessary, round to the nearest tenth of a centimeter.

    asked on April 1, 2013
  67. HS Calculus

    Having trouble with this questions. Please help. A particle moves on the x-axis so that its position at any time t (is greater than or equal to) 0 is given by x(t) = 2te^-t a) Find the acceleration of the particle at t=0 b)find the velocity of the particle

    asked on March 29, 2009
  68. math

    Find p such that px^2-12x+4=0 has only one solution. Thank you!!!

    asked on April 14, 2016
  69. Alg 1

    A baseball player hit a ball with an upward velocity of 46 ft/s. Its height h is feet after t seconds is given by the function h = -16t^2 + 46t + 6. What is the maximum height the ball reaches? How long will it take the baseball to reach the maximum

    asked on April 4, 2013
  70. Chemistry

    Please help! Calculate the standard change in enthalpy, ΔH°rxn, for the decomposition of calcium carbonate to calcium oxide CaCO3 (s) → CaO (s) + CO2 (g) Given that: ΔH°f CaCO3 (s) = -1206.9 kJ/mol ΔH°f CaO (s) = -635.1 kJ/mol ΔH°f CO2 (g) =

    asked on September 27, 2014
  71. 12th grade Physics

    how much tension must a rope withstand if it is used to accelerate a 1200-kg car vertically upward at .80 m/s^2?

    asked on October 24, 2009
  72. math

    Please explain how to solve: Reid and Maria both play soccer. This season, Reid scored 4 less than twice the number of goals that Maria scored. The difference in the number of goals they scored was 6. How many goals did each of them score?

    asked on December 31, 2011
  73. Chemistry

    How would you solve this problem? C4H8(g)--> 2C2H4 Determine the order of the reaction and the rate constant based on the following pressures, which were recorded when the reaction was carried out 430 C in a constant volume vessel. Time (s) P(C4H8)(mmHg) 0

    asked on July 17, 2010
  74. Chemistry

    If delta G for the dissociation of Borax at 30 degrees C (higher than room temperature) is positive, why does it dissolve at room temperature?

    asked on April 5, 2010
  75. Absolute and relative change

    You are charged $279 on your credit card for a hotel stay, you call to complain about the unexpectedly high charge, but are told there are a total of 24% taxes for hotel rooms where you stayed. What was the advertised price of the room before taxes?

    asked on April 24, 2016
  76. chemistry,

    ,I NEED TO DRAW A LEWIS STRUCTURE for C2n2,cyanogen,and to state the noble gas,i know the answer is neon,but i have far to many electrons and am getting the gas argon,please help :N:::C:C:::N: please where do u think i am going wrong I don't know. You

    asked on March 3, 2007
  77. precalculus

    Luigi sells one size of pizza but he claims that his selection of toppings allows for :more than 4000 different choices." What is the smallest number of toppings Luigi could offer?

    asked on September 9, 2007
  78. math

    A rectanglar blacktop with a length of 5x and a width of 3x has been erected inside a rectangular field that has a length of 12x and a width of 7x. What is the area of the part of the field that is not blacktop? (I believe the answer is 69x^2) There is a

    asked on March 1, 2013
  79. Data management

    1)SOLVE: a) 2nP3 = 2(nP4) b)6(n+1P2) = 3nP2 2) If (nC12 = (nC8), find (nC17) and (22Cn) 3)simplify. a) n(squared) (n-2)! - n(n-2)! / n! b) (nC2) - (nCn-2) 4)If nPr - 506 and (nCr_ = 253, find n and r. 5) If (28C2r)/(24C2r-4) = 225/11, find r.

    asked on October 27, 2011
  80. biology

    Which of the following organs remove nitrogenous waste from the body? a. Liver b. Large Intestine c. Kidneys d. Gall Bladder

    asked on January 26, 2017
  81. Poetry

    2. Which of the following lines from the poem includes an example of alliteration? (1 point) Waiting, huddled close together Our food was gone. Our fuel was low. Amundsen had reached the Pole. We had come pursuing glory

    asked on November 27, 2012
  82. Chemistry

    The concentration of fluoride ions in a saturated solution of barium fluoride is __________ M. The solubility product constant of BaF2 is ???

    asked on December 2, 2014
  83. chemistry

    The active ingredient in some antiperspirants is aluminum chlorohydrate, Al2(OH)5Cl. Analysis of a 2.000-g sample of antiperspirant yields 0.334 g of aluminum. What percent (by mass) of aluminum chlorohydrate is present in the antiperspirant? (Assume that

    asked on December 19, 2018
  84. math

    An amount of $27,000 is borrowed for 6 years at 8.25% interest, compounded annually. If the loan is paid in full at the end of that period, how much must be paid back?

    asked on May 5, 2015
  85. Chemistry

    A 10.0 gram sample of a mixture of CH4 and C2H4 reacts with oxygen at 25°C and 1 atm to product carbon dioxide gas and liquid water. If the reaction produces 520 kJ of heat, what is the mass percentage of CH4 in the mixture? I am all out of tries on the

    asked on October 27, 2014
  86. Math

    The table shows the height of an elevator above ground level after a certain amount of time. Let y stand for the height of the elevator in feet and let x stand for the time in seconds. Which equation models the data below? Time (s) Height (ft) 10 235 20

    asked on January 5, 2012
  87. math

    Alyssa is enrolled in a public-speaking class. Each week she is required to give a speech of greater length than the speech she gave the week before. The table below show the length of several of her speeches: WK #/Length of Speech (seconds) 3/150, 4/180,

    asked on April 29, 2013
  88. math

    Please explain in detail how to solve each question: At a certain high school, 350 students are taking an algebra course. The ratio of boys to girls taking algebra is 33:37. How many more girls are taking algebra than boys? How can you write a system of

    asked on January 4, 2012
  89. math

    The Fiedler family has up to $130,000 to invest. They decide that they want to have at least $40,000 invested in stable bonds yielding 5.5% and that no more than $60,000 should be invested in more volatile bonds yielding 11%. How much should they invest in

    asked on November 21, 2018
  90. Math

    Translate the sentence into an inequality. Ten times the sum of a number and 27 is at least 26.

    asked on October 1, 2017
  91. maths

    i have two piece of ribbon one is 17.5cm longer than the other and 1/3 of one ribbon is the same as 3/4 of the other what is the size of the smaller ribbon

    asked on July 9, 2017
  92. math

    The radius of a cylinder is 3x-2 cm. The height of the cylinder is x+3 cm. What is the surface area of the cylinder? The choices are: 2pi(3x^2 + 10x - 8) 2pi(12x^2 + 7x - 2) 2pi(12x^2 - 2x + 13) 2pi(12x^2 - 5x - 2) Please help me in setting this up and

    asked on March 4, 2013
  93. math

    You have $47 to spend on music and movie downloads. Each album download costs $7 and each movie download costs $8. Write and graph a linear inequality that represents this situation. Let x represent the number of albums and y the number of movies.

    asked on December 31, 2011
  94. Alg 1

    Diana is driving 182 miles to Orlando for a math convention. She has already driven x miles of th trip. If Diana drives below 70 miles per hour for the remainder of th trip, which inequality best represents the amount of time in hours, t, that is will take

    asked on April 29, 2013
  95. Alg 1

    Factoring to solve quadratic equations: Use the Zero-Product Property to solve each equation. Write your solution in roster form: The volume of a storage tub shaped like a rectangular prism is 24 ft^3. The height of the tub is 3 feet. The width is w feet

    asked on April 8, 2013
  96. Ap Chem

    Why is it possible for Kp to be less than Kc? If this is the case then when Kc>1 it favors products, but if Kp

    asked on October 9, 2011
  97. chemistry

    i already posted this question, but im still confused on it. Dinitrogentetraoxide partially decomposes according to the following equilibrium: N2O4 (g) -> 2NO2 (g) 2NO2 (g) Initial conc. 0.400 mol 0 mole (no reaction yet) Change -0.3945 mol + 2 x 0.3945

    asked on October 26, 2010
  98. math

    A walking path is shaped like a rectangle with a width 7 times its length "l". What is a simplified expression for the distance between opposite corners of the walking path?

    asked on April 2, 2013
  99. Programming

    Language - PYTHON Design a program that calculates the total amount of a meal purchased at a restaurant. The program should ask the user to enter the charge for the food, and then calculate the amount of a 15% tip and 7% sales tax. Display each of these

    asked on January 5, 2012
  100. Physics

    The speed limit on a particular freeway is 28.0 m/s (about 101 km/hour). A car that is merging onto the freeway is capable of accelerating at 5.50 m/s2. If the car is currently traveling forward at 13.0 m/s, what is the shortest amount of time it could

    asked on September 19, 2011


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