# Ethan

Popular questions and responses by Ethan
1. ## Math | Algebra

Brand A granola is 25​% nuts and dried fruit and brand B granola is 20​% nuts and dried fruit. How much of sweet item A and sweet item B should be mixed to form a 20-lb batch of sweets that is 23​% nuts and dried​ fruit?

2. ## Chemistry

Consider the voltaic cell Zn(s) + Cu{2+}(aq)--> Zn{2+}(aq)+Cu(s) {}=charge Under standard conditions, what is the maximum electrical work, in Joules that can accomplish if 60 g of copper is plated out?

3. ## Calculus

If a ball is thrown in the air with a velocity 44 ft/s, its height in feet t seconds later is given by y = 44t - 16t2. (Round your answers to one decimal place.) (a) Find the average velocity for the time period beginning when t = 2 and lasting 0.5 second.

4. ## Math

A train leaves the station and travels north at a speed of 75 mph. Two hours later, a second train leaves on a parallel track and travels north at 125 mph. How far from the station will they meet?

5. ## Statistics

8. A tetrahedron shaped die gives one of the numbers 1, 2, 3, 4 with equal probabilities. We roll two of these dice and denote the two outcomes by X1 and X2. Let Y1 =(minpX1, X2) and Y2 = |X1 - X2|. (a) Find the joint probability mass function of X1 and

6. ## Chemistry

A voltaic cell utilizes the following reaction and operates at 298K 3Ce{4+}(aq)+Cr(s)--->3Ce{3+}(aq)+Cr{3+}(aq) {}=Charge What is the EMF of this cell under standard conditions? What is emf of cell when [Ce{4+}]=2.1M, [Ce{3+}]=.13M, and [Cr{3+}]=2.0*10^-2

7. ## Literacy

What is the probability of the spinner landing on red or yellow

8. ## Chem

To prepare 20 mL of 15 mM NaCl, how much NaCl would you need to weigh? 2. To prepare 5 mL of 1 mM glucose, how much glucose would you need to weigh? How do you prepare 1 mL of 1 mM NaCl using the NaCl solution you prepared in (1)? 3. How do you prepare 1

9. ## Physics

A crew team rows a boat at a rate of 20 km/h in still water. In practice on a river, the team rows for 30 minutes up the river (against the current), and then for 30 minutes down the river (with the current). The speed of the river current is 1.5 km/h. How

10. ## o level mathematics

in a class of 35, all the pupils play at least 1 game, volleyball, netball and hockey. volleyball only 10, those who play netball only 5, those who play hockey only 3, if 2 play all 3 games how many altogether play volleyball

11. ## Physics

A girl sitting on a merry-go-round moves counterclockwise through an arc length of 3.36m. If the girl’s angular displacement is 2.96 rad, how far is she from the center of the merry-go-round? Answer in units of m.

12. ## algebra

(x4 − 9x + 5x7) + (5x − 10 + 3x4 − 2x2)

13. ## Physics

A certain diving bell for use in the ocean has a square window measuring 0.250 m on each side. The inside of the bell is pressurized and maintained at a pressure of 2.00 atm. The mass density of seawater is 1025 kg/m3. How deep can this bell be lowered

14. ## Physics

If aluminum (Al), with an atomic weight of 27, combines with oxygen (O), with an atomic weight 16, to form the compound aluminum oxide (Al2O3), how much oxygen would be required to react completely with 57g of aluminum ? Answer is in grams.

15. ## Math

David and Coda-Wayne are walking a trail. Ted walks 3.1 kilometers farther than David. Write an expression and solve for X.

16. ## Algebra

The foot of an extension ladder is 9ft from a wall. The height that the ladder reaches on the wall and the length of the ladder are consecutive integers. How long is the ladder?

17. ## Math

An architect is designing an atrium for a hotel. The Atrium is to be rectangular with a perimeter of 728ft of brass piping. What dimensions will maximize the area of the atrium?

18. ## Physics

A 20-kg child running at 1.4 m/s jumps onto a playground merry-go-round that has inertia 180 kg and radius 1.6 m. She is moving tangent to the platform when she jumps, and she lands right on the edge. Ignore any friction in the axle about which the

19. ## math

A video rental company offers a plan that includes a membership fee of \$8 and charges \$2 for every DVD borrowed. They also offer a second plan, that costs \$14 per month for unlimited DVD rentals. If a customer borrows enough DVDs in a month, the two plans

20. ## Physics

A rectangular coil of wire has a dimensions of 4.9 cm by 9.7 cm and is wound with 84 turns of wire. It is turned between the pole faces of a horseshoe magnet that produces an approximately uniform field of 0.54T, so that sometimes the plane of the coil is

21. ## Statistics

Let the joint density function of the random variables X and Y be f(X,Y)(x,y)= 2xe^(x(^2)-y) for 0

22. ## calculus

Find the volume of a solid whose base is bounded by the parabola x=y^2 and the line x=9, having square cross-sections when sliced perpendicular to the x-axis.

23. ## Chemistry AP

Calculate the concentration of H3O + present in 0.377 M H2CO3. Answer in units of mol/L I know the Ka of H2CO3 is 4.3E-7. But I don't know what to do from there. (Or, I'm not getting the correct answer at least)

24. ## SS

What was the purpose of the Adams-Onis Treaty? Can some help me answer this question?? Ms. Sue??

25. ## Chemistry AP

Calculate the pH of a 0.44 M aqueous solution of NH4Cl. Kb = 1.8 × 10−5 . I've tried used the Ka=Kw/Kb equation then used the resulting 5.5e-10 in Kw=([H+][Cl-])/[NH4Cl] , using that to get the [H+], but it isn't correct and I don't know what else to

26. ## Calc

A cylindrical slime tank is placed so that the axis of the cylinder is horizontal. Find the fluid force on a circular end of the tank if the tank is half full, assuming that the diameter is 6 feet and the slime weighs 54 pounds per cubic feet?

27. ## calculus

Find the fourier series of F(x) = 1, -L

28. ## chemistry

Sodium phosphate, Na3PO4, reacts with HCl to form H3PO4 and NaCl. How many liters of 0.1 M HCl are required to react with 0.1 mole of sodium phosphate?

29. ## math

i am a closed shape made of 6 lines segment . i have 2 angle and no right angles what shape am l

30. ## English

What is the 3rd step In the multi step draft reading

31. ## English

identify the author's purpose in this passage. Be sure to include: How do you know this is the author's purpose?

32. ## Geometry

Find an equation in point-slope form for a line having the slope of m=1/6 and containing the point (-7,-3).

33. ## Geometry

What is the radius of a cylinder with a volume of 432pi cm^3 if the height of the cylinders is equal to its diameter?

34. ## algrebra 2

f(x)=2x-2 g(x)=4x+2 find (f0g)(x)

35. ## Political Science

In the Unit 4 lecture on elections, you learned about the median voter theorem. Describe the median voter theorem as it was explained in the lecture. Now, think about the political parties and leadership roles you learned about in Unit 5. How do political

36. ## Calculus

An architect wants to design a window in the shape of a rectangle capped by a semicircle. If the perimeter of the window is constrained to be 24 feet, what dimensions should the architect choose for the window in order to admit the greatest amount of

37. ## Algebra

A company charges \$6 to make an pattern for an order of T-shirts and \$11 for each T-shirt it produces from the pattern. The expression \$11n+\$6 represents the cost of n T-shirts with the same pattern.Find the total cost for 5 T-shirts with the same pattern.

38. ## math

Find the smallest positive integer n for which 126n cube root is a whole number

39. ## math

translation of the quotient of 100 and w

40. ## Chemistry AP

Calculate the pH of a 0.44 M aqueous solution of NH4Cl. Kb = 1.8 × 10−5 . I've tried used the Ka=Kw/Kb equation then used the resulting 5.5e-10 in Kw=([H+][Cl-])/[NH4Cl] , using that to get the [H+], but it isn't correct and I don't know what else to

41. ## Chemistry

Complete and balance the following equation: Cr2O7{2-}(aq)+CH3OH(aq)-->HCO2H(aq)+Cr{3+}(aq) Any feedback would be great, thank you so much.

42. ## Physics

A diver performing a double somersault spins at an angular speed of 4.5 π rad/s precisely 0.70s after leaving the platform. Assuming the diver begins with zero initial angular speed and accelerates at a constant rate, what is the diver’s angular

43. ## Calculus

The widths (in meters) of a kidney-shaped swimming pool were measured at 3-meter intervals as indicated in the figure. Use the Midpoint Rule with n = 4 to estimate the area S of the pool if a1 = 15.5, a2 = 18, a3 = 17, a4 = 14, a5 = 12.5, a6 = 12, and a7 =

44. ## Math

insert grouping symbols into 2x3^3+4 to get it to equal 4374 and 279,936.

45. ## algebra

(4a^3b^2-14a^2b-18ab^2)/(2ab)

46. ## Math

H(x)= 0.002x^2+0.005x-0.029 where x is the speed of the car in miles per hour. How can I rewrite the function so that x represe the speed in kilometers per hour. [Find H(x/1.6)]

47. ## Geometry

What is the length of the midsegment of the trapezoid made by the vertices A(0, 5), B(3, 3), C(5, -2) and D(-1, 2). Show equations and all work that leads to your answer.

factor 7x+42

49. ## math

factor 6x^2-1

50. ## Calculus

The monthly cost of driving a car depends on the number of miles driven. Lynn found that in May it cost her \$410 to drive 300 mi and in June it cost her \$470 to drive 600 mi. (a) Express the monthly cost C as a function of the distance driven, d, assuming

51. ## Physics

An electric vehicle starts from rest and accelerates at a rate of 2.3 m/s2 in a straight line until it reaches a speed of 17 m/s. The vehicle then slows at a constant rate of 1.4 m/s2 until it stops. (a) How much time elapses from start to stop? (b) How

52. ## Physics

(a) If the position of a particle is given by x = 16t - 7t3, where t is in seconds and x is in meters, when is the particle's velocity zero? (b) When is its acceleration a zero?

53. ## chemistry

A precipitate of calcium phosphate is formed when aqueous solutions of sodium phosphate and excess calcium chloride are mixed. If 100.0 mL of 1.5 M sodium phosphate solution is the limiting reactant, how many grams of calcium phosphate can be expected?

54. ## science

Which of the following would be the limiting reagent in the reaction shown below? There are 50 molecules of O2 and 50 molecules of H2. 2H2(g) + O2(g) ==> 2H2O(g)

55. ## science

what is the volume of water ? how do I describe this ?

56. ## Math word problem

you buy a bottle of juice for \$1.00. The juice costs 90 cents more than the empty bottle. How much does the empty bottle cost? The answer is not 10 cents.

57. ## pre-cal

find all solutions in interval [0,2pi] tan²x = -3/2 secx This question may look tricky, but its actually quite simple. First: rearrange the pythagorean identity tan²x+1=sin²x so that it reads tan²x=sin²x-1 Then replace the tan²x in the original

58. ## Finance/Math

1. Present Values. Compute the present value of a \$100 cash flow for the following combinations of discount rates and times. a. r = 8 percent. t = 10 years b. r = 8 percent. t = 20 years c. r = 4 percent. t = 10 years d. r = 4 percent. t = 20 years 2.

59. ## Math

You start a search for a buried object by marking the center of a field as (0,0), with coordinates giving distances in yards. Coordinates to the north or east are positive and coordinates south or west are negative. You find nothing at (-12,8), so u try a

60. ## math

You randomly choose one of the marbles. Without replacing the first marble, you choose a second marble out of 4 marbles

61. ## math

show me how to draw a grillwith a perimeters of14 centimeters.draw all possible rectangles with a perimeter of 14 sentiment and side lengths are whole centimeters label each rectangle with its area

62. ## Math

Name the point with the given coordinates (4, -2).

63. ## Physics

A particle with a charge of 0.08 C is moving at right angles to a uniform magnetic field with a strength of 0.8 T. The velocity of the charge is 800 m/s. What is the magnitude of the magnetic force exerted on the particle? Answer is in N

64. ## Physics

Two long wires, each carrying a current of 9.6A, lie a distance of 49cm from each other. What is the magnetic force per unit length exerted by one on the other. Answer is in N

65. ## Physics

The volume of an ideal gas is increased from 0.92 m3 to 4.07 m3 while maintaining a constant pressure of 1015 Pa (1 Pa = 1 N/m2). (A) How much work is done by the gas in this expansion? W=P(V2-V1) W=1015(4.07-0.92) W= 3197.25 J (B) How much work is done by

66. ## Science

What planet is the furthest from the earth

67. ## History

What happened on black tuesday?

68. ## Math

Tony wants to use his savings at the end of March to buy video games. The games cost \$35.75 each. How may games can Tony buy?

69. ## History

What was the purpose of the West India Company A. to trade American Indian slaves in Portugal and Spain B. to promote free trade between India and Great Britain C. to colonize the eastern shores of India D. to trade African slaves in the West Indies I know

70. ## History

Legacy of the Assyrian Empire?

0.(-7)=

72. ## English

in his famous speech at the march on washington in 1963, dr. martin luther king jr. said, i have a dream that my four little children will one day live in a nation where they will not be judged by the color of their skin but by the content of their

73. ## English

What does Taylor want young people to "know and understand"?

74. ## Language arts

List some important ideas that the cay includes. Why did you choose those ideas?

75. ## Math

An object is thrown directly downwards from a height of 60m with an initial velocity of 11m/s. What will be its velocity on impact with the ground?

Cypress pond

77. ## Art

Creating a portrait that embodies a person's feelings or personality involves

78. ## Science

1.What challenges does pesticides pose to biodiversity? 2.What do you think should be done and why? Can someone help me plz!! i have to write a discussion.

79. ## Social studies

What is the main topic discussed in the Analects of Confucius?

80. ## Biology

I literally cant find anything on this. What kind of epithelial tissue does bone marrow have?

81. ## Chem

To prepare 5 mL of 1 mM glucose, how much glucose would you need to weigh? How do you prepare 1 mL of 1 mM NaCl using the NaCl solution you prepared in I get you would use c=n/v and get grams. But how would you answer the second part of the question?

82. ## math

Give a real-world example of a pattern and identify the terms and the sequence. Please help me. I do not want to fail

83. ## Biology

Which of the following is NOT considered a biohazardous material? A. Blood and body fluids B. Micro-organisms C. 1 M NaCl solution D. Cell lines C?

84. ## Biology

Hey just wondering if you think my answers right, 1)Biological safety cabinets are not required when working with containment level (blank) materials a) 1, b)2, c)3, d)4 - answer a? 2)Materials in Risk Group (blank) pose the least risk to the individual

85. ## Algebra 2

find the equation of a line that is parallel to y=-1/2x+4 and passes through (-2,8)

86. ## Finance

You find the following Treasury bond quote. To calculate the number of years until maturity, assume that it is currently May 2016. The bonds have a par value of \$1,000. Rate Maturity Mo/YR Bid price Ask price Chg Ask Yld 5.374 May 30 104.4991 104.6448

87. ## Finance

You have arranged for a loan on your new car that will require the first payment today. The loan is for \$38,500, and the monthly payments are \$690. If the loan will be paid off over the next 69 months, what is the APR of the loan? (Do not round

88. ## Math

During the first part of a trip, a bicyclist travels 56 miles at a certain speed.The return trip is made at a speed that is 6 mph slower. Total time for the round trip is 16hr. Find the bicyclist's speed on each part of the trip.

89. ## Sequences

A population of 7000 fruit flies is dying off at a rate of 8% per minute. How long will it take for only 700 fruit flies to remain alive?

90. ## Math

A train leaves a station and travels north at a speed of 75mph. Two hours later, a second train leaves on a parallel track and travels north at 125mph. How far from the station will they meet?

91. ## Geometry

(-6g^(-2)h^3)^-3

92. ## Health

Is it normal not to have nocturnal emissions?

93. ## LA

@Ms.Sue Im a person that was looking to help people in la and i found a post that gave all the answers to the connexus page La and the way i reconize it is when i was in 8th that was the program i used, can you shut down the post it was posted at Friday,

94. ## Math-Pre-Calc

Suppose that Mr. X will be giving away a golden homework pass to one student in each class. The recipient of this pass is excused from homework all year. He has developed a unique system for determining who will get the pass. 1. First, he wants all

95. ## math

what is the rate of discount if a sweater regularly priced at \$45. and sold for \$36.

96. ## Geometry ASAP

What is the length of the hypotenuse of a 30-60-90 triangle with a longer leg of length 16m?

97. ## Social Studies

What is a reason that the Missouri Compromise did not have lasting effects? Please Help A.It only applied to the lands of the Louisiana Purchase. B.It only applied to the lands of the Mexican Cession. C.It relied on popular sovereignty. D.It limited the

98. ## Chemistry 1 Honours

When copper(II) nitrate reacts with sodium hydroxide, copper (II) hydroxide is produced. How many grams of Cu(OH)2 can be prepared from 12.7g of Cu(NO3)2 and excess NaOH?

99. ## algrebra 2

g(n)=-4n+2 h(n)=3n+3 Find (g0h)(n)