Popular questions and responses by maddie
  1. Algebra 2

    If two fair dice are rolled, what is the probability that a total showing is either even or less than eight? How would I solve this question? What are the steps? Thanks

    asked on February 6, 2017
  2. MATH

    The odds in favor of Carl beating his friend in a round of golf are 7 : 4. Find the probability that Carl will lose. would the answer be 7/11?

    asked on February 6, 2017
  3. Third Grade Math

    About how much does a button weigh? 1 gram 100 grams 1 kilogram 10 kilograms Thanks!

    asked on March 14, 2011
  4. Differential equations

    Suppose a cup of coffee is at 100 degrees Celsius at time t = 0, it is at 70 degrees at t = 10 minutes, and it is at 50 degrees at t = 20 minutes. Compute the ambient temperature. So in the book I was given Newton's Heat equation. dT/dt=k(A-T) where T is

    asked on April 13, 2018
  5. Math

    A rock is thrown upward with a velocity of 18 meters per second from the top of a 37 meter high cliff, and it misses the cliff on the way back down. When will the rock be 3 meters from ground level? Round your answer to two decimal places.

    asked on July 14, 2020
  6. Math

    Does anyone know the answer to the math riddle "Did you hear about..." the answer is 12 words and it's pg 167.

    asked on December 6, 2011
  7. Physics

    A billiard ball of mass m = 0.250 kg hits the cushion of a billiard table at an angle of θ1 = 58.8° and a speed of v1 = 28.4 m/s. It bounces off at an angle of θ2 = 71.0° and a speed of v2 = 10.0 m/s. (a) What is the magnitude of the change in momentum

    asked on October 31, 2014
  8. Calculus

    A box with a square base and no top is to have a volume of 32 ft3. What dimensions use the least amount of material (in other words what dimensions give minimum outside surface area)?

    asked on May 24, 2015
  9. Algebra

    To solve the system of equations, which expression could be substituted for x into the first equation? 3x-5y=14 x+4y=10 a)10-4y b)4y+10 c)(1/4)x+(5/2) d)(-1/4)x+(5/2) I have another problem just like this one so if you could explain how to solve this one I

    asked on July 27, 2007
  10. Math

    anna made 400 quarts of lemonade. she poured the lemonade into the containers. each container holds 4/7 of a quart. how many containers did anna use

    asked on November 9, 2015
  11. Math

    an airplane is flying a compass of 340 degrees at 325 mph. A wind is blowing with the bearing 300 degrees at 30 mph. Find the component form of the velocity, and find the actual ground speed and direction of the plane.

    asked on February 28, 2014
  12. Math

    What is the range of values of the probability of an event?

    asked on June 25, 2013
  13. science

    Which element is oxidized in this chemical reaction? 4Na(s) + O2(g) → 2Na2O(s)

    asked on January 17, 2020
  14. math 7th grade

    Ingrid mixes 3.6 pounds of almonds with some raisins to make a trail mix. She divides the trail mix into 12 equal portions. Each portion weighs 0.7 pound. How many pounds of raisins did she use to make the trail mix? Express the answer to the nearest

    asked on April 13, 2016
  15. Chemistry

    1. Use the following balanced net ionic equation to determine the volume of 6.0 M HNO3 needed to react completely with 5.00 g of copper. 8H+(aq) + 2NO3-(aq) + 3Cu(s) → 2NO(g) + 4H2O(l) + 3Cu2+(aq)

    asked on October 23, 2015
  16. chemistry

    Study the reaction. 2A(?) + B(g) ⇌ A2B(g) Both B and A2B are gases. When the reaction vessel is compressed, the equilibrium position does not change. What conclusion can we draw about the state of “A” from this data? A. "A" must be a gas because, if

    asked on June 8, 2018
  17. Math

    On Tuesday, Leslie spent 47 minutes on math homework, 39 minutes on science homework, 52 minutes on English homework, and 44 minutes on history homework. How much time did Leslie spend doing her homework on Tuesday?

    asked on April 6, 2015
  18. Physics

    A boat crosses a river of width 115 m in which the current has a uniform speed of 1.84 m/s. The pilot maintains a bearing (i.e., the direction in which the boat points) perpendicular to the river and a throttle setting to give a constant speed of 1.1 m/s

    asked on January 16, 2015
  19. math

    mae has a oval racetrack. 2 curves, each is 1/2 of the circle and each on a radius of 21". 2 straight-aways connect the circle and are 46" long. what is the total distance around the circle?

    asked on January 26, 2012
  20. Human Geography (Religion)

    So I have to do a project on the Cultural Interaction in Religion. My religion is Sikhism. Here are the questions I'm supposed to answer in my presentation: How does the religion impact other aspects of culture? How does this religious faith influence the

    asked on January 20, 2009
  21. pre-calculus

    Initially 700 milligrams of a radioactive substance was present. After 2 hours the mass had decreased by 5%. Construct an exponential model A(t) = A0ekt for the amount remaining of the decaying substance after t hours. Find the amount remaining after 24

    asked on April 16, 2020
  22. Math

    At 6:00 A.M. the temperature was 33°F. By noon the temperature had increased by 10°F and by 3:00 P.M. it had increased another 12°F. If at 10:00 P.M. the temperature had decreased by 15°F, how much does the temperature need to rise or fall to

    asked on February 20, 2018
  23. Equalities- SUPER confused

    If a = 3/5, b = 3, c = 1, d = 5, which equality is true? A)d/a = b/c B)a/b = c/d C)b/a = c/d D)a/d = b/c How do I figure this out?

    asked on February 20, 2018
  24. math

    In constructing a box-and-whisker plot for the data set below, at which values would you draw the left and right sides of the box? 6, 7, 1, 3, 9, 3, 2, 5, 8, 4, 8 A. left at 3; right at 8 B. left at 2; right at 8 C. left at 2; right at 7 D. left at 3;

    asked on April 5, 2017
  25. Math

    What is the upper quartile of the data set below 25, 8, 10, 35, 5, 45, 40, 30, 20 A. 5 B. 8 C. 9 D. 10

    asked on April 5, 2017
  26. physical science

    How much heat is absorbed by a 70g iron skillet when its temperature rises from 24oC to 110oC? joules

    asked on January 1, 2017
  27. math

    The scatterplot shows the number of minutes spent reading (x) and the number of pages read (y) by each of seven students last night. Use the labeled points to create a linear model that predicts the number of pages that a typical student reads in x

    asked on December 15, 2016
  28. Precalculus

    Water is flowing at the rate of 50 m^3/min from a conical reservoir (vertex down) of base radius 45 meters and height 6 meters. What is the water level when the reservoir has 5000 m^3 of water left in it?

    asked on August 16, 2015
  29. Math

    1. What is the range of the ages shown in the stem-and-leaf plot? 3|0,2 4|1,4,4,5 5|3,5,8,9 6|2,2,2,5,6,8 7|5,5,6 A. 4 B. 6--- My answer C. 34 D. 46 What is the median of the ages shown in the stem-and-leaf plot? 58 58.5 59---- my answer 59.5 What is the

    asked on January 17, 2015
  30. gemotry

    The coordinates of the endpoints of AB¯¯¯¯¯ and CD¯¯¯¯¯ are A(2, 3), B(8, 1), C(5, 2), and D(6, 5). Which statement about the line segments is true?

    asked on May 12, 2014
  31. Maths

    A debate team of 4 is to be chosen from a class of 29 where the order in which the members of the team are chosen does not matter. There are two twin brothers in the class. How many possible ways can the team be formed which will not include any of the

    asked on March 16, 2014
  32. Algebra 2

    Why couldn't the chicken find her egg?

    asked on February 16, 2014
  33. Math

    Factor the polynomial completely. 6x^3 + 36x^2 - 240x

    asked on May 18, 2012
  34. chemistry

    what sample size of .9181M vinegar would require 27.50 mL of .5185M of NaOH for neutralization?

    asked on April 13, 2011
  35. Math

    What is the product of 3y2 and 4y5?

    asked on April 23, 2010
  36. Algebra

    The volume of the cube is equal to four times the area of one of its faces. What is the volume of the cube?

    asked on October 21, 2019
  37. Math

    Four less than the product of one and a number xxx.

    asked on August 22, 2019
  38. History

    Which of the following statements best explains the purpose of the Bay of Pigs invasion? a) The Bay of Pigs Invasion was a secret operation, conducted by the CIA, to overthrow Fidel Castro in Cuba. b) The Bay of Pigs Invasion was a massacre of a Vietnamese

    asked on May 27, 2019
  39. math

    which shapes will have an area of 24m2? choose all that apply. a. a triangle with the base of 6m and a height of 4m b. a parallelogram with a base of 48m and a height of .5m c. a trapezoid with the bases of 9m and 3m and a height of 4m d. a triangle with a

    asked on February 21, 2018
  40. Physics

    I know that if a ramp is steeper, larger theta, then the object rolling down will become faster. However, if the object is rolling up the ramp will it slow down like I think it should? How can I prove this? When I try to prove it via a kinetmatics equation

    asked on December 6, 2017
  41. Physics

    How would I find final velocity at the top of an inclined ramp with a given angle theta?

    asked on December 6, 2017
  42. Math

    determine whether the number sentence is true. In each case explain how you could answer without calculating. Check your answers by doing the indicated calculations. A. 50 x 432= (50 x 400) + (50 x 32) B. 50 x 368 = (50 x 400) - (50 x 32) C. 50 x 800= ( 50

    asked on October 25, 2017
  43. Chem

    A 1.0 mL sample of seawater is determined to contain 9.0×10-14 moles of dissolved gold. How many atoms of gold are in that volume of seawater?

    asked on October 10, 2017
  44. Math

    Convert equation from quadratic form to vertex form, y= a(x-h)^2 +k, by completing the square. y= -.25x^2+5.5x-5.25

    asked on January 10, 2017
  45. Math

    1st question: Which events are not independent? You toss three coins and get one head and one tail. You choose three different ice toppings for a sundae. You draw to colored pencils without replacement and get one red and yellow. You pull a yellow marble

    asked on May 18, 2016
  46. chemistry

    how many grams of solid calcium oxide must react with excess water to liberate the same quantity of heat as does the combustion of 24.4 l of methane gas (CH4), measures ar 24.7 c and 753 torr? CaO +H2O --> Ca(OH)2 Delta H = -65.2 KJ CH4 + 2O2 --> CO2 +2H20

    asked on March 22, 2016

    I'm not sure how to do or show the work for these two questions. A) & B.)!! please anyone help: A.) Suppose a chemical reaction starts with 5.00 g of copper (i) nitrate and 2.00 g of magnesium chloride. Balanced Equation: 2 CuNo3 + MgCl2 ---> 2 CuCl +

    asked on February 23, 2016
  48. AP Chem

    1. Van't Hoff factors depend on the concentrations of the dissolved solute species. Why would a dilute solution have a Van't Hoff factor closer to the ideal value? a. because in dilute solutions solute species are less likely to bump into each other and

    asked on January 24, 2016
  49. social justice

    what are examples of distributive, retributive, and communative justice?

    asked on November 30, 2015
  50. Math

    The ratio of the number of men to the number of women to the number of children in a theater is 3:5:2 there are 69 men in theater many more are there in the theater many children are there in theater

    asked on October 20, 2015
  51. Math

    Are 1.6 square meters & 16 tenths square meters the same?

    asked on September 8, 2015
  52. Physics please help

    He drops a ninja ball device from a height of 10.0m. The mass of the enter device is 190g and the mass of the top (smallest) ball is 2.90g A) calculate the momentum of the device as it hits the ground (ignore air resistance) I know that this answer is 2.66

    asked on April 28, 2015

    Suppose the aliens watching the show are on the surface of Mars. Mass of Mars: 6.42 x 10^23 kg Radius of Mars: 3.394 x 10^6 m Calculate; A) the weight of a 40.0 kg alien on Mars B) the weight of 40.0kg alien on earh Earth-sun distance:1.50x10^11m Mars-sun

    asked on March 26, 2015
  54. Advanced algebra

    The number of freshmen entering college in a certain year is 621. What type of data is 621? A. Discrete data B. categorical data C. Continuous data

    asked on August 18, 2014
  55. Math

    I have 10 dozen potatoes which must be equally divided into 20 bags. How many potatoes will be in each bag?

    asked on March 6, 2014
  56. chemistry

    Please explain, in simple English, why is milk a colloid?

    asked on January 8, 2014
  57. Calculus

    Determine whether Rolle's Theorem can be applied to f on the closed interval [a,b]. If Rolle's Theorem can be applied, find all values of c in the open interval (a,b) such that f'(x)=0. f(x) = x^(2/3) - 1 [-8,8] I plugged in both values and found out that

    asked on September 26, 2013
  58. math

    Hi! I'm Maddie. I need some help on my homework. Here are three problems I need help with: A bowl contains only red marbles, blue marbles and green marbles. The probability of selecting a red marble from the bowl is 3/13. The probability of selecting a

    asked on August 21, 2013
  59. math

    You want to put $4,000 in a simple interest account. It has a 2.5% annual interest rate. How long will it take you to earn $500 in interest?

    asked on May 27, 2013
  60. Chemistry

    A solution of hydrochloric acid (HCl) contains 22.5% hydrochloric by mass. What is the molality of this solution I'm not sure how to start this problem...

    asked on March 14, 2013
  61. Chemistry

    What is the molarity of nitrate ions in a solution containing 2.20 mg of Mg(NO3)2 dissolved in 7.35 L of water?

    asked on March 14, 2013
  62. math

    If x = 15 units, y = 7 units, and h = 4 units, then what is the area of the trapezoid

    asked on February 11, 2013
  63. Physics A

    how much work is being done a bookshelf being pulled 5 meters at an angle of 37 degrees from the horizontal? The magnitude of the component of the force that does the work is 43 Newtons

    asked on November 21, 2012
  64. Science

    The sun emits billions of watts of light,heat,and energy ever second. How much of this light,heat, and energy does the Earth benefit from?

    asked on March 28, 2012
  65. chemistry

    A reaction occurs where the concentration of reactant A changes from 0.74 moles/liter to 0.63 moles/liter in 20 seconds. what is the average rate of reaction?

    asked on November 17, 2011
  66. calculus

    rotate the axes and eliminate the xy term of 3(x^2)+2xy+3(y^2)-8

    asked on January 17, 2011
  67. calculus

    rotate the axes and eliminate the xy term of 3(x^2)+2xy+3(y^2)-8

    asked on January 17, 2011
  68. Chemistry

    If .002 L of .650 M NaOH are added to 1.0 L of 0.9 M CaCl2 what is the value of the reaction quotient and will a precipitate form? I keep getting 0.0011 because I thought the answer was [Ca+][OH-] but that's not correct, I think I'm missing a final step

    asked on December 5, 2010
  69. chemistry

    Why does the total energy (Ke+Pe) decrease with height?

    asked on December 6, 2009
  70. Science

    What were the undiscovered elements of Mendeleev's periodic table?

    asked on March 2, 2008
  71. Algebra

    A survey of voters explored the relationship between the ages of voters and whether or not they support building skateboard ramps at a local park. Chart: Age In Favor Opposed Total 18-37 40 10 50 38-57 27 23 50 58 and 6 44 50 over Total 73 77 150 1.) What

    asked on April 16, 2020
  72. History

    ist and describe the four underlying causes of WWI.

    asked on March 22, 2020
  73. science

    The question is........Suppose one large atom bonds with one small atom. Predict whether the properties of the new molecule will be the same as the large atom, the same as the small atom, or different from both atoms.

    asked on March 17, 2020
  74. algebra 2

    One phone company advertises a flat rate of .07 per minute for long distance calls your long distance plan charges five dollars per month plus a rate of .05 per minute how many minutes do you have to talk to each month so that your average cost is less

    asked on February 25, 2020
  75. Math

    If 7000 dollars is invested in a bank account at an interest rate of 10 per cent per year, find the amount in the bank account after 11 years if interest is compounded annually

    asked on February 14, 2020
  76. English

    The main theme of Elizabeth Barrett Browning's poem "How Do I Love Thee," is that love is a powerful and moving force in people's lives. It is expressed through Browning's words in the poem. How is this same theme best conveyed in "The Adventures of

    asked on January 10, 2020
  77. Math

    What are the first 2 common multiples of 8 and 9 that are less than 100?

    asked on November 21, 2019
  78. Math

    Hi there! So in math I am having trouble for factorization. I do get help from my teacher but I’m still confused? Terrence is taking two medications for his flu. He begins taking them both at 10:00 PM on Tuesday. If he takes one every eight hours and the

    asked on November 1, 2019
  79. Math

    A chef has a 2 3/8- pound salmon filet. He slices into 4-ounce servings. a.) How many pounds in each serving? b.) How many 4-ounce servings can the chef create from the filet? How many ounces of salmon are left over?

    asked on October 15, 2019
  80. Science

    Object A has a higher temp then object B. Witch statement is true? A) Object A is a better insulator B) Object B is a better conductor C) Heat will travel from Object A to Object B D) Heat will travel from Object B to Object A The answer is C (I know

    asked on September 18, 2019
  81. math

    Aubs has a photo that is 4 inches wide by 6 inches long. She wants to enlarge its length to 30 inches. What should the width be in order to keep the new photo proportional?

    asked on May 24, 2019
  82. statistics

    A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained physical activity. What sample size should be obtained if she wishes the estimate to be within four percentage points with 90​%

    asked on April 29, 2019
  83. science

    how does the process of plucking cause erison

    asked on March 1, 2019
  84. math

    Jay rides his 2.0-kg skateboard. He is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. The board now goes forward at 13 m/s. A. Determine Jay’s mass. B. Determine the change in the internal energy

    asked on February 1, 2019
  85. English

    What other types of writing is similar to the autobiographical essay email sent to a friend that tells her about an event in your life 2.a book report you wrote for school 3.a postcard sent to your family while you are traveling. 4. A multiple choice

    asked on September 19, 2018
  86. chemistry

    The energies, E, for the first few states of an unknown element are shown here in arbitrary units. n 1 2 3 4 0 E -63 -27 -12 9 infinity A gaseous sample of this element is bombarded by photons of various energies (in these same units). Match each photon to

    asked on September 13, 2018
  87. chemistry

    1125 J of energy is used to heat 250 g of iron. After heating, the final temperature of the iron is measured as 55 °C. The specific heat capacity of iron is 0.45 J/(g·°C). What was the initial temperature of the iron? A. 45 B. 55 C. 20 D. 35 I don't

    asked on June 8, 2018
  88. Physics

    If the bat emits a sound at a frequency of 80.0 kHz and hears it reflected at a frequency of 83.3 kHz while traveling at a speed of 3.9 m/s , calculate the speed of the insect. So using the doppler effect I got that 1.04=(344+3.9)/(344-vbug) This is

    asked on June 7, 2018
  89. Geometry

    A grid shows the positions of a subway stop and your house the subway stop is located at (-3,6) and your house is located at (-7,2) what is the distance to the nearest unit between your house and the subway stop Answers 6 11 9 13

    asked on May 24, 2018
  90. Differential equations

    solve 1/(x^2+1) * y' + xy = 3 for y(0)=0 So I needed to find the integrating factor which is r(x)=e^(integral(p(x)dx)) so here p(x) is just x therefore r(x)=e^(x^2/2)? Then I am supposed to be able to put it in the form d/dx(r(x)y)=RHS but this doesn't

    asked on April 13, 2018
  91. Calculus

    I have a differential equation stating solve: y'=(y-1)(y+1) when y(0)=3 I separated the dy/dx so I got dy/(y-1)(y+1) = dx took the integral of both sides and solved with PFD I then got that x= 1/2 ln(y-1) - 1/2ln(y+1) +c I solved for C and got that C=.3466

    asked on April 7, 2018
  92. Math

    Simplify. -2(3)^2 - 8 ÷ 2 + 6 A) -18 B) -16** C) -7 D) 7 Lucy is trying to find a rational number between 3/8 and and 6/7 What would help her to find this number? A)Divide 3/8 by 6/7*** B)Multiply 3/8 by 6/7 C)Convert 3/8 and 6/7 to Fractions with a

    asked on February 20, 2018
  93. Math

    David is playing a trivia game where he gains points for correct answers and loses points for incorrect answers. At the start of round 3 his score is −1500 points. During round 3 he answered five 1000 point questions correctly and three 500 points

    asked on February 20, 2018
  94. Math again sorry

    A roller coaster starts from a deck at an elevation of 20 feet above the ground. On the first hill it climbs 78 feet and then drops 85 feet. On the second hill the coaster climbs 103 feet and then drops 110 feet. How far below or above the deck is the

    asked on February 20, 2018
  95. History

    what was the purpose of the federal troops occupying Texas after the civil war? conduct military trials to place previous confederate officers on trial. ensure that Texas rejoined the union appropriately.****(my answer) provide training and

    asked on January 10, 2018
  96. science

    Special telescopes, such as the Chandra X-ray Telescope, help astronomers see different kinds of electromagnetic radiation besides visible light. Why is this helpful? • X-Rays give off a spectrum of light that tell astronomers what elements make up

    asked on October 7, 2017
  97. science

    Special telescopes, such as the Chandra X-ray Telescope, help astronomers see different kinds of electromagnetic radiation besides visible light. Why is this helpful? • X-Rays give off a spectrum of light that tell astronomers what elements make up

    asked on October 7, 2017
  98. science

    Special telescopes, such as the Chandra X-ray Telescope, help astronomers see different kinds of electromagnetic radiation besides visible light. Why is this helpful? • X-Rays give off a spectrum of light that tell astronomers what elements make up

    asked on October 6, 2017
  99. Chemistry

    Give the formula and charge of the oxoanion ONLY in each of the following compounds. potassium sulfite sodium perchlorate lithium phosphite magnesium hypochlorite

    asked on September 25, 2017
  100. math/econ

    If the demand is x(p)=40(p-15^2) with p being the price and x being hte demand, what would the elasticity of demand equation be?

    asked on July 20, 2017


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