1. Social Studies

The Underground Railroad used escape routes that went throughout the South. Based on that fact, which of the following conclusions could be made? A) The southern states were leaning toward emancipation B) Slaves were hopeful to acquire jobs in Northern

2. physics

An apple crate with a weight of 225 N accelerates along a frictionless surface as the crate is pulled with a force of 14.5 N as shown in the drawing. What is the horizontal acceleration of the crate?

3. math

help, what did Dr.Drone say to the guy who thought he was a \$100 bill

4. Chemistry

CuCO3=CuO +CO2. Find the mass of 1mole of each substance taking part in the reaction. (Ar:Cu=64,C=12,O=16). When 31g of CuCO3 is used; 1)how many grams of CO2 is formed. 2) what mass of solid remains after heating.

5. MATH

During halftime of a football​game, a sling shot launches​ T-shirts at the crowd. A​ T-shirt is launched from a height of 33 feet with an initial upward velocity of 64 feet per second. The​ T-shirt is caught 48 feet above the field. How long will

6. civic education

mention seven limitations to human rights

7. Math

Which pair of ratios does not form a true proportion? A 8:14â€“20:35 B 6 to 10 and 15 to 25 C 9/5 equals 27/15 D 12:15 and 30:50

8. Math

The volume of an aquarium for one fish is 384 cubic inches. The height of the aquarium is 6 inches. The base is a square. What are the dimensions of the base?

9. Science

Wolves: Moose: 6 10 3.Calculate the average of moose killed by one wolf in each territory. So, would I divide the number of moose by wolves, or wolves by moose?

10. calculus

A spherical balloon is losing air at the rate of 2 cubic inches per minute. How fast is the radius of the ballon shrinking when the radius is 8 inches.

11. Physics

A ball thrown with a speed of 100m/s attains a height of 150m (take g=9.8 per second square). Calculate: 1. Time of flight 2. Angle of projection 3. Range

12. Science

A uniform half meter scale is balanced at 60 cm mark.when weight of 10 gf and 30 gf are suspended at 20 cm and 90 cm mark respectively calculate the weight of scale

13. math

A board 5 feet long slides down a wall. At the instant the bottom end is 4 feet from the wall, the other end is moving down the wall at a rate of 2 feet per second. At the moment, how fast is the bottom end sliding along the ground?

14. physics

A person pushes on a 55-kg refrigerator with a horizontal force of -250 N; the minus sign indicates that the force points in the -x direction. The coefficient of static friction is 0.56. (a) If the refrigerator does not move, what are the magnitude and

15. Math(simple interest)

A person borrows two equal sums of money at the time at 5% and 3.75% simple interest respectively & finds that if he repays the former sum a year before the latter the amount paid in each case is the same that is Rs.736. Find the total sum borrowed.

16. science

When a manganous salt is fused with a mixture of KNO3 and NaOH the oxidation no. Of Mn changes from +2 to what?

17. Science(physics)

A boy while driving to his school covers at the average speed of 15km/h.On his return trip along the same route, covers at the average speed of 25km/h due to less traffic.What is the average speed for the whole trip

18. Math

A toolshed with a square base and a flat roof is to have a volume of 800 cubic feet. If the floor costs \$6 per square foot, the roof \$2 per square foot, and the sides \$5 per square foot, determine the dimensions of the least expensive shed.

19. Computers (RAM)

Just giving this a shot, Which of the following statements about RAM are TRUE? Select all that apply. a) Any part of RAM can be accessed at any time. b) RAM is an area of a computer that holds programs and data that are waiting to be processed, to be

20. calculus

is my answer to this question correct A spherical balloon is losing air at the rate of 2 cubic inches per minute. How fast is the radius of the ballon shrinking when the radius is 8 inches. Answer= .0024

21. physics

Only two forces act on an object (mass=3.19 kg), as in the drawing. Find (a) the magnitude and (b) the direction (relative to the x axis) of the acceleration of the object.

22. physics

One block rests upon a horizontal surface. A second identical block rests upon the first one. The coefficient of static friction between the blocks is the same as the coefficient of static friction between the lower block and the horizontal surface. A

23. physics

when an apple falls from a tree, and strikes the ground without bouncing, what happens to its momentum?

24. physics

During a storm, a tree limb breaks off and comes to rest across a barbed wire fence at a point that is not in the middle between two fence posts. The limb exerts a downward force of 253 N on the wire. The left section of the wire makes an angle

25. Math

Find the vertex H(x)= -3x^2+24x-46

26. finance

7500\$ investment in each of 20 stocks ( beta of portfolio=1.12). suppose you decide to sell one stock that have beta 1 for 7500\$, and use them to buy another one of beta=1.75 calculate the beta of new portfolio ?

27. physics

A car is traveling up a hill that is inclined at an angle θ above the horizontal. Determine the ratio of the magnitude of the normal force to the weight of the car when (a)  θ = 17o and (b)  θ = 30o

28. math

an airline company offers a round-trip group flight from New York to London. If x people sign up for the flight, the cost of each ticket is to be 1000-2x dollars. Find the maximum revenue the airline company can receive from the sale of tickets from the

29. math

Aubrey is painting a mural of an ocean scene. The triangular sail on a sailboat has a base of 4 feet and a height of 6 feet. Aubrey will paint the sail using a special white paint. A can of this paint covers 10 square feet. How many cans of white paint

30. physics

A mountain climber, in the process of crossing between two cliffs by a rope, pauses to rest. She weighs 520 N. As the drawing shows, she is closer to the left cliff than to the right cliff, with the result that the tensions in the left and right sides of

31. Geometry

Lacy made a scale model of her house. Her house is 45 feet tall. Her model is 9 inches tall. What is the scale of the model? How many times as times as tall as her house is her model?

32. Geometry

If a tangent segment and a secant segment are drawn to a circle from the same point, the external part of the secant segment is longer than the tangent segment. True or False?

33. Math

the number of library books in a school increased by 20% after it bought new books in May , the number increased by another 20% after a bookstore donated 300 books in June - Find the number of books in the library before it bought new books in May

34. Math

Carlo is eating a bag of Skittles. In the bag, thre are 5 red, 2 green and 4 purple Skittles. What is the probability that Carlo will pick a red Skittle, eat it and then pick a green Skittle?

35. Math

Reema has a ribbon which is 8 metres long. How many pieces can be cut from the ribbon if each piece is 2/3 of a meter

36. Math(simple interest)

Mr.X invested a total of Rs.10,000 in three different accounts, the Accounts paid simple interest at an annual rate of 8%,9% and 7.5% respectively. Total interest earned for the year was Rs.845. The amount in the 9% account was twice the amount invested in

37. physics

when temperature increases from t to # t and the moment of inertia is increase from I to #I. the coefficent of linear expansion is alpha .THE RATIO OF #I\I IS

38. Algebra

X is a number.It is divided by 3,and 5 is subtracted from the result.The new result is then multiplied by 7.If the final answer is 28,what number is X?

39. Math

2 jugs are filled with water. If you remove 1 liter of water from the first jug, then the two jugs contain the same amount of water. If you remove 2 liters from the second jug, then the second jug would contain half as much as the first jug. How many

40. Math

By selling an article for rs.17,a shopkeeper losses 15%. At what price should he sell it to gain 15% ?

41. math

the perimeter of a triangle is 23 cm. all side lengths are integers. if one side measures 5cm, what is the length of the largest possible side?

42. math

A scientist observes two colonies of bacteria. The first grows at a rate of 2.2 x 10^6 bacteria per hour. The other grows at a rate of 6.3 x 10^5 bacteria per hour. Which grows faster? How do you know?

43. math

A person 6 feet tall walks at a rate of 150 feet per minute toward a light tower whose searchlight is located 40 feet above the ground. Find the rate that the length of the shadow is changing.

44. Pre-Calculus

Squares of side length x are removed from the 4 corners of an 11in by 8.5in piece of paper. The sides are then folded up to create an open-top box. Write a funcion that determines the volume of the box and determine the functions range. How much should be

45. Physics

A 100 grams mass of a substance has a volume of 150 centmetre cube.Calculate the relative density of the substanc. [density of water pw=1.0gcm^-3]

46. math linear equation

The sum of two number is 110 .oneffifth of the larger number is 8 more than one ninth of the smaller number. Find the number

47. Math

At one afterschool event, of the students were 8th graders and the rest were 7th graders. Of the students who were in 7th grade, the ratio of boys to girls was 3:5. What percent of all the students at the afterschool event were boys who are in the 7th

48. math

A plane travels east from San francisco towards St. Louis at 500 miles per hour, and a turbojet travels north from new orleans toward St. louis at 600 miles per hour. Find the rate of change of the distance between them when the jets are 300 miles apart,

49. calculus

Water leaking onto a floor creates a circular pool with an area that increases at the rate of 3 square inches per minute. How fast is the radius of the pool increasing when the radius is 10 inches?

50. Math

Two jugs are filled with water. If you remove 1 liter of water from the first jug, then the two jugs contain the same amount of water. If you remove 2 liters from the second, then the second jug would contain half as much as the first. How many liters of

51. Physics

A piece of metal of volume 250 centimetre cube floats in water when 85 percent of its volume is under water.Calculate the upthrust on the metal. [pw=1.0gcm^-3]

52. Algebra

If a positive two-digit integer is divided by the sum of its digits, the quotient is 2 with a remainder of 2. What is the two-digit integer?

53. Account _trial bal

Goods return from debtors come in which account debit or credit

54. math

Area of Parallelograms:Find the height of a parallelogram with base 9.44 meters and area 70.8 square meters.

55. Math- Sequences and Series

Sn= N^2-4n, using this formula find the first 4 terms

56. MATHS

CAN YOU FRAME 3 ISOSCELES TRIANGLES FROM AN EQUILATERAL TRIANGLE?

57. Physics

An empty bottle weighs 20 grams and 60 grams when filled completely with water.What would the bottle weigh when filled completely with mercury. [pw=1.0gcm^-3,pm=1.6gcm^-3]

58. Math

If a positive two-digit integer is divided by the sum of its digits, the quotient is 2 with a remainder of 2. What is the two-digit integer?

59. Maths

Find the gradient of the line joining(-4,6) and (3,0)

60. Math

Ms. Jones is baking a cake for her students. She needs 2/3 cup of brown sugar to make the cake. Right now, she has 3/4 cup of brown sugar. Does she have enough to make the cake?

61. algebra

Can someone help me solve this story problem? Tom is buying a 42 inch 1080 television on sale for 40% off. If the aspect ratio is 16:9 and the frame around the screen is 1 inch wide,will it fit in an entertainment center with an opening that is 36 inches

62. Physics

What is specific heat

63. math

Sonia bought washing machine 10000and paid 2000 and rest in installments of rs 500 at the rare 10℅ find the total amount paid

64. math

There are 3 boys for every 4 girls in school. If there are 200 girls, how many pupils are there in all? Help me please. This is my homework and I need it right now because we have a class for tomorrow.

65. Math

A rope hangs from the ceiling. It reaches the floor exactly. It is 4 feet from the wall. When it is pulled to the wall, the end of the rope is 4 inches above the floor. How high is the ceiling?

66. Math

Parallelogram ABCD is inscribed in a circle. Then, the measure of angle A must be 90?

67. Math

Natalie had some marbles. She gave 1/3 of them to her brother,who kept 12 marbles for himself and gave the rest to 5 friends.If each friend received 7 marbles, how many marbles did Natalie have at firts?

68. Math

Becky has \$60 and Nina has \$120. How much money must Becky give to Nina so that the amount of money Nina has is 5 times what becky has?

69. calculus

Verify the means value theorem holds on the interval shown. Then, find the value c such that f'(c)=(f(b)-f(a))/(b-a) a. f(x)= x-1/x on [1,3] b.f(x)=x^3=x-4 on [-2,3] c. f(x)= x^3 on [-1,2] d. f(x)= Sqr. root of x on [0,4]

70. calculus

find the maximum and minimum value of the function f(x)= x-x^3 on the interval [-2,2] I also need help with this question What is the largest possible product of two negative number whose sum is 1?

71. Math

Whuch of the following expressions is equivalent to the expression below? 4[5x+2-x]

72. calculus

Is this the correct answers for these questions Verify the means value theorem holds on the interval shown. Then, find the value c such that f'(c)=(f(b)-f(a))/(b-a) b.f(x)=x^3=x-4 on [-2,3] c= square root 7/3 c. f(x)= x^3 on [-1,2] c= square root 1 d.

73. math

If \$10,000 is invested in an account at 4.8% annual simple interest, how long will it take for the account balance to grow to \$11,200? I am confused. How do you do this?

74. Math

A dictionary costs \$24. The total cost of the dictionary and 4 identical diaries is the same as 7 diaries. How much does 1 diary cost?

75. calculus

What is the largest possible product of two negative number whose sum is 1?

76. Calculus

What is the largest possible product of two non-negative number whose sum is 1

77. Math

Ivan has a 5-cent stamp, a 10-cent stamp, and a 20-cent stamp.How many different combinations of postage can he form with the stamps?

78. math

Pretend that you are now a senior in high school. You have been planning a vacation for mid-winter recess with your friends. Ten years ago, your parents put \$200 in a savings account for you. It offered 6% simple interest rate to spend on food and

79. calculus

how do I graph this using the first and second derivative and three sign charts. i have to label the inflection point, extreme values and the intercepts also. f(x)= x^3-6x^2

80. Mathematics

What is the least positive integer greater than -1? Thanks :D

81. Math

Find the vertex f(x)= x^2+6x+5

82. physics

Traveling at a speed of 18.0 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.580. What is the speed of the automobile after 1.44 s have

83. Math

Let the function a@b be defined as 3a + 2b for all real numbers a and b. If u and v are real numbers for which u@v =v@u = 20, what is the value of 2u@3v?

84. Maths

What is the largest possible number that can be created for pin 9987 if no repetition is allowed For Outline baking the bank issues customers with access code ,the code has 3lettera followed by 3digits

85. Maths

PQRS is a rectangle, whose diagnols PR =2x + QS=3x+1.Find the value of x

86. Math

The sum of the first 10 terms of a geometric series is 699 050. The common ratio is 4. Determine the first term.

87. Pre-Calculus

A cylinder's height is 5cm longer than the radias of its base. Write a función modeling the cylinder's volume in terms of its diameter.

88. Texas History

which capital was located nearest the frontier

89. Pre-Calculus

Tommy is building a rectangular playpen for his pigs where one side of the play area is a side of his barn. He has enough material to make a fence with a total length of 160 feet. write a función that represents the playpen's área in terms of its length

90. Math

Solve the simultaneous equation n/4-m/6=-1 m/5+n/2=10 Using elimination method

91. Math

The sum of 3 numbers is 975. If you subtract x from each of these numbers you obtain 12, 345, and 126 respectively. What is x?

92. Physics

An alloy of iron and silver has a total mass of 30 grams and a volume of 20.4cm^-3.Calculate the mass of iron only and the volume of silver only. [Density of iron=1.62gcm^3 and density of silver=0.9gcm^3]

93. Trig

Let n be a fixed positive integer. Describe all solutions of sin(n theta) = 1/2 I know that the solutions would be (π/6)/n+(2πx)/n and (5π/6)/n+(2πx)/n ? How do I 'describe'

94. Math

Alicia, Bill, and Ross are in Group A. David, Maddie, and Shelby are in Group B.The students are going to have their pictures taken. They will stand in 2 rows by group, and group members cannot be separated. If 2 girls or 2 boys cannot be standing next to

95. calculus

Given, F(n+1)-12f(n)=0. n≥1, where F(1)=-3 find the solution to the equation.