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. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. math

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

    asked on May 15, 2012
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  17. 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
  18. 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
  19. 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
  20. chemistry

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

    asked on July 2, 2010
  21. 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
  22. 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
  23. 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
  24. geometry

    Algebra BD bisects

    asked on September 14, 2012
  25. 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
  26. 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
  27. 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
  28. 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
  29. 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
  30. 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
  31. 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
  32. 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
  33. 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
  34. 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
  35. Math

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

    asked on November 9, 2011
  36. 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
  37. 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
  38. 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
  39. 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
  40. 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
  41. 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
  42. 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
  43. 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
  44. 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
  45. 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
  46. Math

    Jeff and his friend each text four classmates about a concert. Each classmate then text four students from another school about the concert. If no one receives the message more than once, how many students from the other school receive a text about the

    asked on December 2, 2015
  47. 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
  48. 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
  49. 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
  50. 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
  51. 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
  52. 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
  53. 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
  54. 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

    3. Which of the following methods of reporting research is not followed by most scientists? (Points : 1) publishing a research paper online publishing a research paper in print holding a press conference presenting a talk at a meeting Question 4. 4. Who

    asked on January 8, 2014
  56. 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
  57. 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
  58. 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
  59. 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
  60. 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
  61. math

    Please explain how to set this up and how to solve: A school's rectangular athletic fields currently have a length of 125 yd and a width of 75 yd. the school plans to expand both the length and the width of the fields by x yards. What polynomial is

    asked on March 21, 2012
  62. 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
  63. 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
  64. 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
  65. 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
  66. physics

    A loaded dogsled has a mass of 400kg and is being pulled across a horizontal, paced snow surface at a velocity of 4.0m/s (N). Suddenly, the harness separates from the sled. If the coefficient of kinetic friction for the sled on the snow is 0.0500, how far

    asked on October 22, 2010
  67. 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
  68. 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
  69. 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
  70. 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
  71. math

    A parallelogram has an area of 8x^2 - 2x -45. The height of the parallelogram is 4x + 9. I know the formula for a parallelogram is A=bh. Please work and explain how I get the length of the base of the parallelogram. Thanks

    asked on March 27, 2013
  72. 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
  73. math

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

    asked on April 14, 2016
  74. Physics

    A 66-kg water skier is being pulled by a nylon (Young's modulus 3.7 x 109 N/m2) tow rope that is attached to a boat. The unstretched length of the rope is 20 m and its cross-section area is 2.8 x 10-5 m2. As the skier moves, a resistive force (due to the

    asked on March 23, 2016
  75. math

    A community center is expanding the size of its rectangular meeting hall. The hall is currently 300ft long and 150ft wide. The center plans to expand both the length and the width of the meeting hall by 3x ft. What polynomial in standard form represents

    asked on March 4, 2013
  76. 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
  77. 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
  78. Math

    During one year, people in the U.S. older than 18 years old watched a total of 342 billion hours of television. The population of the U.S. older than 18 years old was about 209 million people. On average, how many hours of television did each person older

    asked on January 4, 2012
  79. 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
  80. chemistry

    What would be the final temperature of the system if 28.4 g of lead at 99.5 ◦C is dropped into 14.0 g of water at 8.61 ◦C in an insulated container? The specific heat of lead is 0.128 J/g◦C.

    asked on March 28, 2019
  81. chemistry

    What mass of steam is required to release 3.15×105 kJ of heat energy on condensation? Answer in units of g.

    asked on March 28, 2019
  82. english

    Compare Robert Fulghum’s list of things learned in kindergarten (see the Connection on page 72) to Franklin’s list of virtues. Which list do you think would be more useful to people today? In general, how does Franklin’s scheme for moral perfection

    asked on November 11, 2014
  83. 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
  84. 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
  85. College Physics

    1. A spring gun is made by compressing a spring ina tube and then altching the spring at the compressed position. A 4.97-g pellet is placed against the compressed and latched spring. The spring latches at a compression of 4.06 cm, and it takes a force of

    asked on June 29, 2011
  86. Calculus

    This is the question - you are designing a rectangular poster to contain 256 in^2 of printing with a 3 " margin at the top & bottom and a 2 " margin at each side. What overall dinmensions will minimize the amount of paper used? Round to the nearest whole

    asked on March 30, 2009
  87. Science

    Suppose a mutation occurs in the gene for a particular aminoacyl-tRNA synthetase. The mutation changes which amino acid is recognized, without affecting which tRNA molecule is recognized. How is this likely to affect protein synthesis?Find all that apply.

    asked on October 26, 2017
  88. 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
  89. math

    You have a total of 52 dimes and quarters. You have 10 more quarters than dimes. Which system of equations can you use to find the number x of quarters and number y of dimes you have? Use the system to determine how much money you have in quarters and

    asked on March 15, 2017
  90. algebra 1

    top and bottom margins are 7/8 inch there are 5 rows of pictures with 3/16 inch between the vertical what would be the height of each picture

    asked on October 22, 2012
  91. 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
  92. Math

    A school is fencing in a rectangular area for a playground. It plans to enclose the playground using fencing on three sides (One length is a wall) The school has budgeted enough money for 75 ft of fencing material and would like to make a playground with

    asked on February 12, 2012
  93. chemistry

    The standard molar heat of vaporization for water is 40.79 kJ/mol. How much energy would be required to vaporize 2.00 mol of water? Answer in units of kJ.

    asked on March 28, 2019
  94. 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
  95. 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
  96. 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
  97. chemistry

    Calculate ∆H0 for the reaction 2 N2(g) + 5 O2(g) −→ 2 N2O5(g) given the data H2(g) + 1 2 O2(g) −→ H2O(ℓ) ∆H0 f = −283 kJ/mol N2O5(g) + H2O(ℓ) −→ 2 HNO3(ℓ) ∆H0 = −78.7 kJ/mol 1 2 N2(g) + 3 2 O2(g) + 1 2 H2(g) −→ HNO3(ℓ)

    asked on March 28, 2019
  98. Chemistry

    The human body obtains 885 kJ of energy from a chocolate chip cookie. If this energy were used to vaporize at 100 degree Celsius, how many grams of water could be vaporized? The heat of vaporization of water at 100 degrees Celsius is 40.7 kJ/mole.

    asked on July 20, 2016
  99. math

    The batting averages of the first three batters in the Eureka College women’s softball team lineup are .310, .301, and .277. If the first three batters are considered as the “lead-off group”, what is the batting average of the group? A. .301 B. .296

    asked on April 15, 2015

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

    asked on August 23, 2014


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