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

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?

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

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

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.

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.

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

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)?

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

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

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.

12. ## Math

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

13. ## science

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

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

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)

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

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?

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

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?

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

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

22. ## Math

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

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?

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;

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

26. ## physical science

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

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

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?

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

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?

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

32. ## Algebra 2

Why couldn't the chicken find her egg?

33. ## Math

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

34. ## chemistry

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

35. ## Math

What is the product of 3y2 and 4y5?

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?

37. ## Math

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

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

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

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

41. ## Physics

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

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

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?

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

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

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

47. ## CHEMISTRY! HELP

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 +

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

49. ## social justice

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

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 A.how many more are there in the theater B.how many children are there in theater

51. ## Math

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

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

53. ## PHYSICS HELP

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

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

55. ## Math

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

56. ## chemistry

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

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

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

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?

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...

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?

62. ## math

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

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

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?

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?

66. ## calculus

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

67. ## calculus

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

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

69. ## chemistry

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

70. ## Science

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

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

72. ## History

ist and describe the four underlying causes of WWI.

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.

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

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

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

77. ## Math

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

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

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?

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

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?

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​%

83. ## science

how does the process of plucking cause erison

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

85. ## English

What other types of writing is similar to the autobiographical essay 1.an 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

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

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

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

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

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

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

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

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

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

95. ## History

what was the purpose of the federal troops occupying Texas after the civil war? 1.to conduct military trials to place previous confederate officers on trial. 2.to ensure that Texas rejoined the union appropriately.****(my answer) 3.to provide training and

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

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

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

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