# Questions Asked onJune 29, 2016

1. ## Stat

lottery offers one \$900 prize, two \$700 prize, two \$400 prize and five \$200 prize. One thousand tickets are sold at \$5. Find the expectation if a person buys two tickets

2. ## chemistry

2Na+(aq) + 2OH−(aq) + Zn2+(aq) + 2NO3−(aq) → Zn(OH)2(s) + 2Na+(aq) + 2NO3−(aq) Write the net ionic equation for this precipitation reaction.

The following is taken from a State of the Park Report for Banff National Park. Visitors Numbers Total Visitors: 2004= 3,135,727. 2005=3,164,906. 2006=3,281,435 Total visitor days: 2004= 7,453,465. 2005= 7,518,997. 2006= 7,784,044 Total visitors have

4. ## Financial math

Janet Woo decided to retire to Florida in 5 years. What amount should Janet invest today so she can withdraw \$45,000 at the end of each year for 20 years after she retires? Assume Janet can invest money at 5% compounded annually.

5. ## Chemistry

What will the pH of a solution be when 0.5447 L of NaOH (pH = 14.436) is added to 0.357 L of 2.01 M ascorbic acid (H2C6H6O6)? Not sure how to do this.

6. ## Physics

A rock falls off the edge of a cliff that is 145 m above the ground beneath it. For how long a time is the rock falling? Assume air resistance is negligible. A. 4.9 s B. 2.9 s C. 4.5 s D. 3.3 s E. 5.4 s

7. ## Analytic Geometry

what is the radius of the circle circumscribing an isosceles right triangle having an area of 162 sq. cm? Show your solutions pls. Thank you!

8. ## science

Here are some examples of molecules: Cl2, CO2, SO2, and CF4. Each of these is related in that they're all bonded covalently. Which of these is a covalently-bonded molecule also? A. He atoms B. K2S C. BaBr2 D. P2O4

9. ## Chemistry

How would you find out whether a sample of sodium chloride is pure or impure

10. ## Math

Find the future value of an ordinary annuity of \$70 paid quarterly for 5 years, if the interest rate is 10%, compounded quarterly. (Round your answer to the nearest cent.)

11. ## University of Liberia Chemistry 102

Using a current of 4.75A how many minutes does it takes to plate onto a sculpture 1.50g of CuSO4 solution?

12. ## trig

what is the exact value of tan 105 degrees

13. ## Math- Assignment Due

Please help me, it would be greatly appreciated. 1.) A set of data was collected as shown in the table. Data value: Frequency: 5. 9 6. 9 7. 14 8. 9 9. 13 10. 7 11. 9 The standard deviation of the data is A..) 1.90 B.) 2.00 C.) 2.33 D.) 7.93 2.) A group of

14. ## Math

- If the 4th term of an arithmetic sequence is 24 and the 12th term is 56, whats the first term?

15. ## Algebra

The product of two numbers, A and B is 840. THe difference of two numbers, A and C is 816. GIven that C is the greatest number and B is the smallest 2-digit even number, find the values of A, B, and C?

16. ## Math( Assignment Due Today)

During a nature trip, Joni, Billy and Larry documented the location of an eagles nest. From point a, the campers observed the Eagles best on tip of a tree directly across a deep stream. The angle of elevation to the nest from point a is 35 degrees. The

17. ## Math

Two trains leave the station at the same time, one heading east and the other west. The eastbound train travels 12 miles per hour slower than the westbound train. If the two trains are 400 miles apart after 2 hours, what is the rate of the eastbound train?

18. ## chemistry

How would prove that sodiumhydroxied is a base without using litmus paper to test

19. ## Math2

Bob has entered his giant pumpkin into the tops field fair in New England. To qualify for the finals, pumpkins must meet a minimum weight requirement, which is based on the weights of all of the entries. This year, 55.17% of all entries will make it to the

20. ## Maths

An industrial fertilizer costing \$370 per tonne to produce is sold retail 61 cents per kilogram.If there is a wastage of 2.5%,find the profit as a percentage of the cost?

21. ## History

were the reformation and counter-reformation popular movements of the carefully orchestrated manipulations of charismatic figures or both? Why?

22. ## Math easy HELP

Written as the product of its prime factors, 360=2^3 times 3^2 times 5. So find the smallest positive integer k such that 360k is a cube number.

23. ## algebra

The second term of an arithmetic sequence is 24 and the fifth term is 3.Find the first term and the common difference.

24. ## Calculus

A box with square base and rectangular sides is being designed. The material for the sides costs 20 cents per square inch and that for the too and bottom costs 10 cents per square inch. The box is to hold 150 cubic inches. What dimension of the box will

25. ## English

* 1. You can feel safe now. 2. You are able to feel safe now. 3. You are allowed to feel safe now. (I allow you to feel safe now. You may feel safe now.) 4. You have the possibility of feeling safe now. ======================================== What is the

26. ## Calculus

A printed page is to have 1.5 inches margin on all sides. The page should contain 144 square inches of type. What dimension of the page will minimize the area while still meeting these other requirements?

27. ## Physics

A 0.2kg toy car rolls down a ramp with a height of 0.7m. What is the speed of the car at the bottom of the ramp. At the bottom it hits a stationary car with a mass of .4 kg. The two cars have velcro bumpers and stick together. At what speed do the two cars

28. ## math

The billion period has three different even digits whose sum is 12. each of the other places is occupied by 8. what is the number?

29. ## Math(Assignment Due

Please help me, I have know idea how to do this and the assignment is due today! A manufacturer is producing metal rods, whose lengths are normally distributed with a mean of 75.0cm and a standard deviation of 0.25cm. If 3000 metal rods are produced how

30. ## Math

If the 4th term of an arithmetic sequence is 24 and the 12th term is 56, whats the first term?

31. ## physics

a stone is projected vertically upward and reaches a maximum height of 20m before it returns to the thrower find the total time taken

32. ## English

A sudden snowstorm hit the city and caused a huge power outage . This was highly unusual.

33. ## Calculus

A box (with no lid) is to be constructed from a sheet of card board by cutting the squares from corners and folding up the sides. Suppose the original sheet of card board measures 16 inches by 16 inches. What would the size of the squares removed to

34. ## Math

find missing coordinate of ordered pair so that it is solution 9x+4y-4=0

35. ## PHY1610-2520

an initially resting 300g car is dragged along a horizontal frictionless table by a massless cord. The cord is attached to vertically hanging 60g mass by a frictionless massless pulley. If the car starts from rest, determine the time it would take for it

36. ## Physics

What is the acceleration of a car that goes from 20 to 30 km/h in 1.5s? At the same acceleration, how long will it take the car to go from 30 to 36 km/h?

37. ## Maths

The shadow of pole at a particular time of day is 1√3 times the height of pole. What is the elevation of the source of light?

38. ## math

A salesman has to choose between two schemes of remuneration.The first scheme has a fixed salary of rs 3700 and a commission of 2% on sales above rs 50000. The second scheme has no salary but offer commission only. The commission starting from 3% of sales

39. ## U.S History

How much did the availability of resources aid in industrialization? Why?

40. ## Algebra

My question is related to this algebra question. Could you kindly explain how did you get the father's age? Pls.

41. ## math

find the area of a squad that has sides of length 96 inches

42. ## science

How Do the Earth's Four Subsystems Work Together?

43. ## English

1. You can go home now. 2. You are able to go home now. 3. You are allowed to go home now. (I allow you to go home now.) 4. It is possible for you to go home now. ----------------------------- It is a little confusing. If somebody says, "You can go home

44. ## math

How many yards is 9000024km

45. ## math

A flame is ejected vertically upward from the groung at 15m/s.Find the height of the flame after 2.5seconds

46. ## Physics

A satellite orbits the Earth with a radius of 7000km. The acceleration of gravity at this distance=8.17m/s/s. How do I find the velocity of the satellite? I'm really struggling with finding the correct formula. I know the answer but can't figure out how to

47. ## Physics

Calculate the formula for coefficient of kinetic friction in an inclined plane with a pulley and two masses coonected by a rope. You can only use the weight of the two masses, the height where the second object is and the distance that the first object

48. ## Phys

You are designing a curve in a highway. If the turn is too sharp (the radius of curvature is too small), then cars may lose traction. Find the minimum radius of curvature of a road so that a 1000kg car doesn't skid. The speed limit is 15m/s and the static

49. ## math

which of he following statements are true or false- 1]the diagonals of a parallelogram are equal 2]the diagonals of a rectangle are perpendicular 3] the diagonal of a rhombus are equal 4]every rhombus is a kite

50. ## math

The sum of two opposite angles of a parallelogram is 130 degree.

51. ## math help

A salesman has to choose between two schemes of remuneration.The first scheme has a fixed salary of rs 3700 and a commission of 2% on sales above rs 50000. The second scheme has no salary but offer commission only. The commission starting from 3% of sales

52. ## Probability :(

Brenda’s Bike Booth, at the mall, allows people to order a bike in their choice of 4 colors (Atomic Tangerine, Banana, Café Noir, or Dollar Bill) and the options of with or without a basket; with or without a horn. Given all of these options, what’s

53. ## phy.

how for apart two praton be if the elactrostatic force between then is equale to the weight of elactron.

54. ## Math

William sold 6.84 litres of lemonade more than Susan.Tim sold 18.3 litres of lemonade more than Susan.William sold 21 litres of lemonade. a)How many litres of lemonade did Tim sell? b)How many litres of lemonade did they sell altogether?

55. ## calculus

Find the volume generated by revolving about the x-axis the region bounded by the following curves y=sqrt/(4x+3),x=0,x=4, and y=0. (Use "pi" for π).

56. ## calc

Find the volume of the solid generated by revolving the given region in the 1st quadrant about the y-axis: y=10x^2,x=0,y=810.

57. ## Math

Find the value of k so that the point (-2,4) lies on the graph of the function g(x)=x*squareroot (x+k)* +6

58. ## solid geometry " urgent help"

if the plane of a circle of center M contained in plane X , MA perpendicular to plane X and if AM = 2√7 cm , BC = 8 cm find the length of AB..

59. ## Math

Evaluate 6! divided by 2!

For a particular group of people, the number of hours of sleep per night is normally distributed with a mean of 7.7 and a standard deviation of 1.6. To the nearest tenth 67% of people in this group will sleep over blank hours?

61. ## physics

A motorcycle/rider combination has a center of mass that is half a meter diagonally upward and in front of the point of contact between the wheel and the road at an angle of 30 degrees when the bike is level. What acceleration is necessary to keep the bike

62. ## math

find the number that is twelve and a quarter times greater than its reciprocal

63. ## Math

Complete the given table for the equation 4x+y=9

64. ## calculus

the fence around a rectangular compound costs \$4 a foot for three of the four sides. the fourth side is the wall of a building, so no fence is needed for that side. we will call the distance of the fence parallel to the wall w for width and the two other

65. ## Algebra

car a leaves phoenix heading north at a constant speed of 40mph car b leaves two hours later and follows car a at a constant speed of 54 mph how many hours does it take car b to catch up to car a? algebra

66. ## math

A cartraveled 281 miles in 4 hours 41 mins. What was 326 miles per hour.

67. ## Physics

I'm really struggling trying to understand what formulas to use for the following: A satellite orbits the earth with a radius of 7000 km. (a) what is the acceleration of gravity at this distance? (b) what is the velocity of the satellite? (c) how long does

68. ## Math

Workers in a certain company are required to 8% of their salary into a social security fund. Mr Doe has a monthly salary of GH¢22.00 . How much does he pay into the fund every month? And every year?

69. ## math

A three-digit code is made up of three different digits from the set (2,4,6,8). How many three-digit codes can be formed if no digit is repeated?

70. ## math

in the numeral 1 992, the thousand digit is increased by 7 and the tens digit is decreased by 4. what is the new number formed?

71. ## math

In the numeral 1 992, the thousands digit is increased by 7 and the tens digit is decreased by 4. what is the new number formed?

72. ## Biology

how to maintain the qualities of water ?