Popular questions and responses by Carly
  1. math

    One member of the debate team is going to be chosen President. Each member is equally likely to be chosen. The probability that a girl is chosen is 2/3 the probability that a boy is chosen. If the debate team has 20 people, how many girls are there?

    asked on May 19, 2019
  2. math

    A lawyer drives from her home, located 6 miles east and 10 miles north of the town courthouse, to her office, located 4 miles west and 14 miles south of the courthouse. Find the distance between the lawyer's home and her office. I know the answer is 26

    asked on July 19, 2016
  3. Calculus

    Find the largest and smallest values of the given function over the prescribed closed, bounded interval of: f(x)=(3x-1)e^-x for 0

    asked on July 10, 2011
  4. Maths

    Two ships leave from the same port. One ship travels on a bearing of 157 degrees at 20 knots. The second ship travels on a bearing of 247 degrees at 35 knots. (1 knot is a speed of 1 nautical mile per hour). Calculate the bearing of the second ship from

    asked on September 30, 2017
  5. Physics

    Musicians can use beats to tune their instruments. One flute is properly tuned and plays the musical note A at exactly 440Hz. A second player sounds the same note and hears that her flute is slightly "flat" (that is, at too low of a frequency). Playing at

    asked on December 9, 2014
  6. math

    How do I solve for F here? Solve C = 5/9(F-32) for F

    asked on October 2, 2018
  7. math

    16. Assume that there are 20,000 runners in the New York City Marathon. Each runner runs a distance of 26 miles. If you add together the total number of miles for all the runners, how many times around the globe would the marathon runners have gone?

    asked on September 4, 2018
  8. Mathematics question

    A zoo keeper weighed some of the animals at Melbourne Zoo. He found that the lion weighs 90 kg more than the leopard, and the tiger weighs 50 kg less than the lion. Altogether the three animals weigh 310 kg. How much does the lion weigh? (A) 180 kg (B) 150

    asked on June 4, 2017
  9. Calculus

    A manufacturer can produce digital recorders at a cost of 60 dollars each. It is estimated that if the recorders are sold for P dollars a piece, consumers will buy q= 150-p recorders each month. What is the average rate of profit obtained as the level of

    asked on July 18, 2011
  10. Math

    The producer of a 30 minute tv documentary about world war 1 divided it into two parts. four times as much program time was devoted to the causes of the war as to the outcome. how long is each part of the documentary?

    asked on November 22, 2016
  11. math

    When a situation can be modeled by a linear equation, what information do you need in order to find an equation?

    asked on October 29, 2016
  12. Math

    Find all points on the x-axis of a Cartesian coordinate system that are 20 units from the point (0,12) The point (0,12) would just be 12 points up on the y axis, so wouldn't I just count 20 spaces to the left and right so it would be (20, 12) and (-20,

    asked on March 1, 2016
  13. physics

    if you use a horizontal force of 30 N to slide a 12 kg wooden crate across a floor at a constant velocity, what is the coefficient of kinetic friction between the crate and the floor?

    asked on October 12, 2015
  14. Math

    slope and y intercept form of these two problems? Y-5=1/3(x-9) 2y+6a-4x=0

    asked on October 11, 2012
  15. Science

    1. An electric space heater draws 15.0 A from a 120 V source. It is operated, on average, for 5.0h (hours) each day. a) How much power does the heater use and b) At $.10 per kWh, what does it cost to operate the heater for 30 days? 2. Suppose each person

    asked on May 15, 2012
  16. chemistry

    Refer to 3CuCl2 (aq)+2Na3PO4 (aq) = Cu3(PO4)2+6NaCl (aq) If a student started with 18 grams of CuCl2 and enough Na3PO4 to completely react, how many grams of Cu3(PO4)2 will (theoretically) be produced?

    asked on October 16, 2011
  17. Calculus

    Solve the separable differential equation: dy/dt=4y^6 and find the particular solution satisfying the initial condition y(0)=-3 y(t)=?

    asked on July 29, 2011
  18. Math

    5432-54342890n3-432983n-34njnkjdm-49-fjsok n=4569 j=498323 k=678 d=567 m=5803 f=5647 s= 128 s=647382

    asked on February 5, 2009
  19. science

    In science, my question is What is the volume of a pea? 1)What does pea means? i think it is a fruite, buut i am not sure.. 2)I forgot what volume means in science. 3)i don't know what to do. AND 4)I NEED HELP!!!!!!!!!!

    asked on October 2, 2008
  20. grade 8 math

    At the annual Grade 8 ski trip, for every 2 students who skied, 3 snowboarded. Ninety-six students snowboarded. How many students skied? Show your work. Can someone help???

    asked on September 28, 2008
  21. math

    Direct vs. Indirect Variation The volume of the water in a swimming pool as it is filled at a rate of 200 gallons per minute. I said this is direct variation V = 200t The volume of the water in a swimming pool as the water drains at a rate of 200 gallons

    asked on November 23, 2019
  22. math

    Suppose a radio active substance decays at a rate of 3.5% per hour. First write an exponential decay function that describes a quantity of radio active substance that starts at 100. Then determine how much is left after 6 hours? Round to the nearest

    asked on April 18, 2019
  23. math

    How do I find the x intercepts of the function f(x) = -6x^2 + 2700x - 63,750 I know the y has to = 0, but I'm not sure how to solve for x.... Thank you.

    asked on November 8, 2018
  24. physics

    A 3.90 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=14.1N at an angle theta=32.5degrees above the horizontal, as shown. a.) What is the magnitude of the acceleration of the block when the force is applied?

    asked on October 8, 2015
  25. physics

    Three blocks on a frictionless surface are connected by massless strings, with M1 = 1.40 kg, M2 = 2.40 kg, and M3 = 3.60 kg. Due to the force F acting on M3, as shown, the system accelerates to the right. Given that T1 is 3.50 N, calculate T2

    asked on February 12, 2014
  26. Math

    A used bookstore sells paperback fiction books in excellent condition for 2.50$ and In fair conditions for 0.50$. Write an expression for the cost of buying (e) excellent condition paperback and (f) fair condition paperback.

    asked on September 24, 2012
  27. General Chemistry

    What is the molarity of OH- in a 5.78×10-3 M C6H5CO2Na solution that hydrolyzes according to the equation. C6H5CO2-(aq) + H2O(l) = OH-(aq) + C6H5CO2H(aq)

    asked on November 5, 2010
  28. Chemistry

    hi! this question confuses me. "Pennies have mass of approximately 2.5 g. How many pennies are needed to make a mole of copper?" if anyone can help, that would be amazing.

    asked on January 14, 2010
  29. calc

    Integrate (1/2)^(3x+2)dx using substitution.

    asked on December 6, 2009
  30. English 4

    I have a project due tomorrow and no matter HOW HARD I look I CANNOT FIND any quotes supporting the theme "painted faces" AND I have to document them with the page number!!! Can somebody please help me? I have to have atleast five. Any help would be

    asked on March 26, 2009
  31. science (density)

    1) mass=100g, volume=10ml,density= 2) volume=7ml, mass=70g, density= 3) mass=50g, volume=10cm3, density= 4) volume=30cm3,mas=90g,density= 5) mass=120,volume=6ml,density= Thanks everyone i apresheate your help.

    asked on October 9, 2008
  32. math

    One number is 12 more than another. The sum of the smaller number and twice the larger number is 39. Find the larger number.

    asked on January 30, 2008
  33. marketing

    What is possibly the best indicator of a country's ability to use technology to leap several stages of economic development in a very short time? a. the quality of the educational system b. the general economic environment c. the size of the population d.

    asked on December 11, 2019
  34. math

    Inverse Variation I'm doing something wrong in my calculation but I can't figure out what -- The cost per person to rent a mountain cabin is inversely proportional to the number of people who share the rent. If the cost is $36 per person when 5 people

    asked on November 24, 2019
  35. math

    Direct vs. Inverse Variation Also this one: You purchase a new SUV; as age increases, the resale price decreases. I believe this would be inverse, but the answer packet says neither direct nor inverse. As I understand inverse, as one value goes up, the

    asked on November 23, 2019
  36. math

    A roller coaster is being built with a very steep drop and falls 64 feet over a horizontal distance of 160 ft. a. What is the percentage grade of this drop? Round to the nearest tenth of a percent. I did 64/160 = .4 so as a percentage that is 40% b. What

    asked on November 15, 2019
  37. math

    The height of a sunflower being grown for a botany experiment can be modeled with a linear equation with variables y (height in cm) and x (days after measurements started). The line has slope 2.9. Two weeks after measurements started, the height was 49.1

    asked on November 6, 2019
  38. math

    2p - 4p < _ -2 that is less than or equal to because I don't know how to make the symbol on my computer Then I get -2p < _ -2 Divide both sides by -2 to get p > _ 1 Is that correct, that when you divide by a negative number the sign changes direction??

    asked on October 28, 2018
  39. math

    Write the equation of the line that passes through the points (3, -2) and (-2, 8) using the slope-intercept form. My slope is -2 So if I substitute in one of the points, -2 = -2(3) + b -2 = -6 + b Add 6 to both sides and b = 4 So my equation is: y = -2x +

    asked on October 22, 2018
  40. math

    John is buying floor tile to put in a room that is 10 ft by 15 ft. He has chosen tiles that are 18 in by 18 in. Assuming that he needs to buy 10% extra to be safe, how many tiles would he need to buy. I know that I need to buy enough for 150 square feet,

    asked on February 21, 2018
  41. Chemistry

    How many moles of magnesium nitride form when 1.0 mole of magnesium reacts completely?

    asked on March 19, 2017
  42. math

    The area of a circle of radius r is πr^2, which happens to be 1/2r times the circumference 2πr. Explain why this relationship should be expected.

    asked on March 5, 2017
  43. Health

    1. In a soccer game, the coach of the home team realizes her players are not as highly skilled as the other team and she wishes to avoid a high scoring game which she believes her team will not win. How can she apply coaching tactics to give her team the

    asked on December 15, 2016
  44. Health

    At the mall, John and three of his friends are waiting for the movie to start. One of his friends has an older brother who says he can get them all into the movie for free if they go around to the back of the building and come in through the employee

    asked on December 15, 2016
  45. math

    The air pressure at sea level is generally about 1013 hPa (hectoPascals). For every kilometer that you go up in elevation, the air pressure decreases by 12%. Write an equation that describes the air pressure when the elevation is x kilmoeters above the sea

    asked on December 14, 2016
  46. math

    Find the initial amount given an exponential function. Given the equation y = 24(0.77)^t, what is the initial amount? To find the initial amount, I need to replace t with 0. When I do that, I get y = 24(0.77)^0 which is y = 24(1), so y = 24 In doing other

    asked on November 30, 2016
  47. math - business

    My profit formula is P = -.005x^2 + 4x - 200. The question wants me to find the number of donuts sold (what they are talking about in the problem) that will generate the highest profit. How do I determine that? Thank you.

    asked on November 19, 2016
  48. math

    Hi, I'm trying to learn factoring but a couple of things don't make sense to me and I'm hoping you could explain them. If I have P(x) = 2(x-3)(x-4), how do I automatically know that the zeros are x = 3 and x =4? If inside the parentheses it was (x+3)(x+4),

    asked on November 15, 2016
  49. math

    I need to come up with some ideas of things that have interesting linear relationships. I understand that a linear relationship is something that has a straight line, so is growing or declining at a constant amount every time period, or mile, or whatever,

    asked on October 18, 2016
  50. math

    Hi, When I'm making a graph, how do I know what scale to use? I often struggle with this. Does the origin always have to start at 0? But then I don't know what intervals to use. Is there a rule of thumb? I'm referring to things like scatter plots and

    asked on October 18, 2016
  51. math/stats

    A hamburger chain found that 65% of all customers use mustard, when they buy hamburgers. If 5 customers randomly selected, what is the probability that none use mustard?

    asked on June 25, 2016
  52. Physics

    A 2050 kg truck is traveling east through an intersection at 2.3 m/s when it is hit simultaneously from the side and the rear. (Some people have all the luck!) One car is a 1200 kg compact traveling north at 4.5 m/s. The other is a 1600 kg midsize

    asked on March 8, 2014
  53. Math

    How do I solve this absolute value inequality? Should I add two to both sides first? | -3n | - 2 = 4

    asked on November 8, 2012
  54. Math

    What is 6x minus 6x? 0x or just 0?

    asked on November 1, 2012
  55. English

    I feel stupid for not knowing these but I can't figure it out! So in the sentence we have "underline the verb be (and its various forms) and decide how it's used. Circle the verb its helping or linking to and Write linking verb or helping verb on the line"

    asked on September 24, 2012
  56. chemistry

    Under certain conditions, neon (Ne) gas diffuses at a rate of 4.5 centimeters per second. Under the same conditions, an unknown gas diffuses at a rate of 10.1 centimeters per second. What is the approximate molar mass of the unknown gas?

    asked on May 26, 2011
  57. Chemistry

    Calculate the mass of silver metal (Ag) produced from the reaction of 5.58 grams of copper metal (Cu) according to the following reaction: Cu(s) + 2AgNO3(aq) --> Cu(NO3)2(aq) + 2Ag(s)

    asked on February 27, 2011
  58. algebra 2

    a store is offering a discount of 30% on a suit. There is a sales tax of 6%. A) using a composition of function, represent this situatio in which the discount is taken before the sales tax is applied. B) using a composition of functions represent the

    asked on January 23, 2011
  59. geometry

    the measure of x is greater than four times the measure of a supplement to it. is this possible? if so, graph the possibilities for c on a number line. if not, explain why not.

    asked on November 30, 2010
  60. general chemistry

    I've been trying to solve these for while now, and i keep getting them wrong.... please help!! A solution of NH4Cl hydrolyzes according to the equation. If the [NH3] in the solution after hydrolysis is 0.00000508 M, calculate the equilibrium concentration

    asked on November 5, 2010
  61. Biology

    In detail can someone please explain to me how cooking eggs makes them safe to eat in connection with enzymes Thank you I understand that enzymes are killed because of the heat as it is a factor in destroying the enzymes activity but how does this explain

    asked on October 24, 2010
  62. Math

    Using factoring to solve each quadriatic equation. 2x^2-5x-3=0. This is what I have so far but don't know what to do from here. GCF:1 A:2 B:-5 C:-3 AC:-6 Goal is the find two numbers that add to -5 and multiply to -6 Factors of 6: 1,6 -2,3 (That's the one)

    asked on April 9, 2010
  63. math coordinate plane

    A rectangle is plotted in the coordinate plane. The vertices (corners) of the rectangle are given as A(–2,3), B(4,3); C(–2, –2) and D(x,y). What is the ordered pair for point D?

    asked on January 21, 2010
  64. Math

    Hi everyone, I would like some help with Math.. And I would like help but if you have time.... My question is: (8x101)+3x101+(7x101010)= I don't really know the answer to this, but while i have this posted I will try to find a way to figure it out.

    asked on September 30, 2008
  65. AP bio

    Explain why adaptations of organisms to interspecific interactions do not necessarily represent coevolution. What would a researcher have to demonstrate about an interaction between two species to make a convincing case for coevolution? i don't understand

    asked on October 4, 2007
  66. Human biology Coursework

    On the net it has been suggested and my experiment it has been proven that Fructose can break down Vitamin C or atleast stop it from being effective in some way. I can not find ant theories on the net to how this breakdown happpens. As someone who has

    asked on March 5, 2007
  67. math

    Ok so i honestly have no idea what this is so if you could help me out it would be great!! Matthew will deposit $500 into an account earning 6.25% simple interest. Bodie will deposit $450 into an account earning 6.5% Compound interest. WHO has more money

    asked on May 27, 2020
  68. Health

    How do you ask for help for your mental health? My parents aren't really that accepting and I'm afraid of being casted out to a mental asylum, and called "crazy" like they've said before. I honestly don't know what to do.

    asked on April 6, 2020
  69. Algebra

    LOG2 (X+3)= LOG2 (4X-24) THANKS

    asked on January 28, 2020
  70. math

    What is the difference if a quadratic equation is set equal to 0 or to y? For example: y = x^2 - 8x + 15 OR x^2 - 6x - 16 = 0

    asked on November 20, 2019
  71. math

    We are given a table starting with year 1992 and going until year 2000. It says these are the closing prices for NASDAQ Stock Index at the end of February. There are three columns in the table - the year, x, and the price. By the year 1992, the first year,

    asked on November 17, 2019
  72. math

    I am working on a problem about bacteria growing and I used my calculator to find the exponential equation to be y = 10006.06771(1.2297)^x First it asked how many bacteria would there be after 6 hours which was easy because I just plugged in 6 for x and

    asked on November 17, 2019
  73. math

    Nikki is planting tomato plants in her garden. She has 20 feet along the back side where she plans to plant as many tomato plants as she can fit. The instructions specify to allow at least 20 inches between the holes where the plants will be planted.

    asked on November 16, 2019
  74. math

    When a soccer ball is drop-kicked into the air, the height h in feet of the ball after t seconds can be modeled by the quadratic function h(t) = -16t^2 + 32t + 4. a. When does the ball hit the ground? Round to the nearest thousandth of a second. I used the

    asked on November 15, 2019
  75. math

    (x - 5)(-.025x + 220) Is the answer -.025x^2 + 220x - 1100 OR -.025x^2 + 219.875x - 1100 I keep getting the first answer but in class the teacher said the answer was the second one and I'm getting frustrated because I can't get the second one!

    asked on November 14, 2019
  76. math

    I posted the question below last week and while it was answered, thank you, I am still unclear about my original question of how do I know what is considered the NEW value and what is considered the ORIGINAL value. I understand there is a change, yes, but

    asked on September 17, 2019
  77. math

    I am doing a project for math class and it is asking for the relative change. In our book, the formula is relative change = new value - original value/original value. The project is we look up nutritional values of items at a restaurant and then we have to

    asked on September 13, 2019
  78. math

    I am looking at an olympic event that has happened every 4 years (except for when the olympics didn't happen because of the wars). I found a line of best fit for this data and it is y = -0.0101x + 29.809 The questions are a) Does your graph have a

    asked on May 16, 2019
  79. math

    Would someone check this for me please because I'm a little confused. The height of a golf ball in meters can be described by the equation h = -4.9t^2 + 22.7t, where t is the number of seconds after it was hit. a) Find the vertex AND explain what each

    asked on May 9, 2019
  80. math

    Find the x-intercepts of the polynomial y = x^2 - 4x + 3 I'm not sure how to approach this -- do I first factor it and then my x intercepts are (#, 0)? So, for example, factored would be (x - 3)(x - 1) I set those equal to 0 so my x intercepts would be (3,

    asked on April 30, 2019
  81. math

    Hello, I am working on exponential equations of best fit. I have a table numbered from 1-7 with corresponding numbers. I put that into my calculator and came up with the exponential equation of best fit as y = 8.46(1.42)^x Now it wants to know how long it

    asked on April 22, 2019
  82. math

    Which equation is NOT an example of a direct variation? a. y = x b. 4x + 3y = 0 c. y = 5/4 x d. 2x + 6y = 0 Direct variation is y = kx The only one that can't be changed to become this is d. Is that correct?

    asked on April 2, 2019
  83. math

    Hi, Would you please check to see if I did this problem correctly? Your distance from lightning varies directly with the time it takes you to hear thunder. If you hear thunder 10 seconds after you see the lightning, you are about 2 miles from the

    asked on April 2, 2019
  84. math

    Hi, would you please check to see if I did this problem correctly? A recipe for 2 dozen corn muffins calls for 3 cups of flour. The number of muffins varies directly with the amount of flour you use. a. Write a direct variation equation for the

    asked on April 2, 2019
  85. math

    I had to look up a restaurant's nutrition information and pick an entree. Then the question says this: Assume that one serving of fat is approximately 5 g, one serving of protein is approximately 7 g, and one serving of carbohydrates is approximately 15 g.

    asked on March 5, 2019
  86. math

    Body mass index (BMI) is essentially a comparison between a person's weight and height. A BMI between 18.5 and 24.9 is considered healthy, over 25 is considered overweight, and over 30 is considered obese. How do you think a person's height varies with

    asked on February 23, 2019
  87. math

    How do I factor 9x^2 - 49? I believe this is a difference of squares, but I'm not sure how to do it with the 9 in front of the first term.......

    asked on December 4, 2018
  88. math

    How can you tell if a function is quadratic? Just if the highest power is 2? Are there any other ways?

    asked on November 29, 2018
  89. math

    If you're looking at a set of data, how can you tell whether a linear or exponential line of best fit would be most appropriate for the data?

    asked on November 29, 2018
  90. math

    What is the connection between the solutions of the equation ax^2 + bx + c = 0 and the x intercepts of the graph f(x) = ax^2 + bx + c? I'm confused here - aren't they the same thing except one is the equation of a quadratic equation and one is a graph? So

    asked on November 24, 2018
  91. math

    I'm trying to multiply this and keep getting the wrong answer: (x - 5)(-0.025x + 220) I have used the FOIL method and I have multiplied (x - 5) -0.025x and then multiplied (x - 5) 220. Both methods I get the same answer. But... the answer book and the

    asked on November 14, 2018
  92. math

    Try as I might, I just don't understand the difference between inductive and deductive reasoning. I have tried reading about it and they keep talking about general and specific things but I just don't get it. Is there an easy, lay way to explain it so I

    asked on November 12, 2018
  93. math

    What is the difference between the correlation coefficient and residuals when talking about the line of best fit? With the correlation coefficient, I know you want your number to be close to 1 or -1. So when talking about residuals, what is considered a

    asked on October 25, 2018
  94. math

    I am learning about lines of best fit and how to do them on my calculator. I found the correct equation and now I need to find predicted values for x. I have all my x values and I have my equation. Do I need to do each of these manually on my calculator,

    asked on October 24, 2018
  95. math

    I have to answer the question: "why are inequalities a more realistic way to model situations than equations" and am having trouble with this. One reason I thought about is because inequalities are more applicable to real life situations. But other than

    asked on October 23, 2018
  96. math

    I am to solve this inequality: 2/3x < -12 I multiplied both sides by 3/2 to get x < -12(3/2) x < -18 But the answer shows x < -9 What have I done wrong?

    asked on October 16, 2018
  97. math

    I need to recreate a graph in Excel but don't know how to get started. I know how to make graphs in Excel, that's not the problem, I just don't know how to do this one. I can see the what this one is supposed to look like, and from the answers, there are

    asked on October 14, 2018
  98. math

    When writing an equation in point-slope format, is it not proper to fully solve for y? For example, here is my problem: Find the point-slope equation for a line containing the point (-7, 2) and the slope m = 3. The answer was this: y – 2 = 3(x + 7) I was

    asked on October 8, 2018
  99. math

    I need to solve a literal equation -- Solve for h: A = 1/2bh If I divide both sides by 2b, then my answer would be h = A/2b Is this correct?

    asked on October 2, 2018
  100. math

    Why does an account with linear growth and a steady increase of $700 each month have a changing relative difference while an account with exponential growth and a steady 3% increase each month have a steady relative difference of 5% each month?

    asked on September 20, 2018


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