# lina

Popular questions and responses by lina
1. ## Micro Economics

A nation's production possibilities curve is "bowed out" from the origin because a. resources are not equally efficient in producing every good c. resources are scarce d. wants are virtually unlimited . John has a paper route and spends all his weekly

2. ## Physics

A mass M = 40.0 kg is suspended by a massless string from the ceiling of a van which is moving with constant acceleration a, as shown in the figure. If the string makes an angle theta = 21° with respect to the vertical, what is the acceleration a of the

3. ## Physics

The mass of an astronaut is 72kg. (a) what is his weight on earth ( taking g to be 10N/kg) ? (b) if the astronaut is on the moon's surface where the acceleration due to gravity is one-sixth on the earth , calculate (I) the mass (ii) the weight of the

4. ## algebra 1

Write an equation in slope-intercept form for the line parallel to y = 5x - 2 that passes through the point (8, -2)

5. ## Physics

A cork gun contains a spring whose spring constant is 18.0 N/m. The spring is compressed by a distance ∆X = 6.0 cm and used to propel a cork of mass 7.66 g from the gun. Assuming the cork is released when the spring passes through its equilibrium

6. ## Math

What does it mean to get a 150% salary raise?

7. ## Algebra

The general equation for depreciation is given by y = A(1 – r)t, where y = current value, A = original cost, r = rate of depreciation, and t = time, in years. A car was purchased 6 years ago for \$25,000. If the annual depreciation rate is 11%, which

8. ## Economic

in the early 1980s when the Polish people had to stand in long lines to purchase most consumer goods, the government ordered that every third place in line be reserved for pregnant women or disabled persons. this was presumably done to reduce their

9. ## Tcc

What are the magnitudes of (a) the angular velocity, (b) the radial acceleration, and (c) the tangential acceleration of a spaceship taking a circular turn of radius 3220 km at a speed of 29000 km/h?

10. ## Physics

Calculate the thermal energy required to convert 5kg of ice at 0 Celsius to steam at 100 Celsius

11. ## Physics

A particle P travels with constant speed in a circle of radius 7.3 m and completes one revolution in 34.0 s (see Figure). The particle passes through O at t = 0 s. What is the magnitude of the average velocity during the interval from t = 11.9 s and t =

12. ## math

n a lilac paint mixture, 40% of the mixture is white paint, 20% is blue, and the rest is red. There are 4 cups of blue paint used in a batch of lilac paint. a. How many cups of white paint are used? cups b. How many cups of red paint are used? cups c. How

13. ## chemistry

A gas is confined to a container with a massless piston at the top. (Part C figure) A massless wire is attached to the piston. When an external pressure of 2.00 atm is applied to the wire, the gas compresses from 4.90 to 2.45 L. When the external pressure

14. ## US History

Which region of this map was ceded by France to the United States? North Northeast *** South and southeast West The picture shows West Florida in the middle, the Gulf of Mexico below it, part of some other states near the sides and top.

15. ## english

in robert frosts poem birches the lines you many see their trunks arching in the woods years afterwords training their leaves on the ground like girls on hands and knees that throw their hair ue which two poetic devices?

The Eatery Restaurant has 200 tables. On a recent evening, there were reservations for 1/10 of the tables. How many tables were reserved?

17. ## math

If r = 12.5 and s = |−13|, which of the following inequalities is not true??? 1.r≠s 2.r< s 3.r≥s 4.r≤s

18. ## physics

A figure skater glides along a circular path of radius 4.70 m. (a) If she coasts around one fourth of the circle, find the magnitude of the displacement vector. m (b) If she coasts around one fourth of the circle, find what distance she skated. m (c) What

19. ## chemistry

What volume of oxygen(in Liters) at 25 degrees C and 1.05 atm is needed to completely combust 2.65L of methane, measured at STP

A total revenue function is given by R(x) = 1000(x^2 - 0.1x)^1/2 , where R(x) is the total revenue, in thousands of dollars, from the sale of x items. Find the rate at which total revenue is changing when 20 items have been sold.

Can a secondary consumer be eaten by another secondary consumer? Thanks! :-)

22. ## statistics

If a sample of size 30 is selected, the value of A for the probability P(t greater or less A) = 0.01 is?

23. ## algebra

write an algebraic expression that let x represent the unknown value seven times a quantity

24. ## physics! description explanations

The graph at the right is a positive vs. Time graph for the motion of an object moving along a horizontal (x) axis For each of the 8 1-second time intervals, describe the displacement, instantaneous velocity (+/- and whether the velocity is increasing or

25. ## Maths

|a|-3/4=-5/8 a. 1/8 or -1/8 b. 7/8 or -7/8 c. 1 3/8 or -1 3/8 d. No solution could someone walk me through perhaps? I missed a ton of class.....So did Fae.

26. ## Algebra

A type of plant is introduced into an ecosystem and quickly begins to take over. A scientist counts the number of plants after m months and develops the equation p(m)=19.3(1.089) raised to m, to model the situation. Most recently, the scientist counted 138

27. ## Maths

1. In the xy-coordinate plane, point A is the midpoint of the segment with endpoints (2,4) and (-4,-4). What is the distance from point A to the origin? I know how to find the distance between the two points- 10. But I don't know where to go from there. 2.

28. ## history

what ideas is about dividing government into legislative judicial and executive branches

29. ## Simple Probability Question

A small manufacturing company has rated 80% of its employees as satisfactory and 20% as unsatisfactory . Personnel records show that 75% of the satisfactory workers had previous work experience in the job they are now doing, while 30% of the unsatisfactory

30. ## Math

Choose the most specific term that will make the following statement true. Do not assume anything more than the information given. I am a ____ because my opposite sides are congruent and parallel. square rectangle parallelogram rhombus

31. ## pre-calculus

Rewrite the expression so that it involves the sum or difference of only constants and sines and cosine to the 1st power (sinx)^4

32. ## math

a rectangle has an area of 360 square .what .it is 20 centimeters long.what is its perimeter

33. ## Chemistry

How will the equilibrium: Heat energy + CH4 + 2H2S = CS2 + 4H2 be affected by the following? a) A decrease in temperature? b) The addition of H2 c) The removal of some CH4 d) An increase in the volume of the container e) The addiotion of a catalyst. i know

34. ## Physics

For constant acceleration, how does the average velocity for an interval compare with the instantaneous velocity at half-time in the interval?

35. ## statistics

If a sample of size 30 is selected, the value of A for the probability p(t¡Ý A)= 0.01 is?

36. ## math

Which equation has the complex number 4-3i as a root? 1) x^2+6x-25=0 2) x^2-6x+25=0 3) x^2+8x-25=0 4) x^2-8x+25=0 Can anyone please teach me how to do it?THANKS A LOT!!!

37. ## math

Solve each equation. a. 4x=32 x= 8 b. 4=32x x= c. 10x=26 x= d. 26=100x x=

38. ## math

A recipe for banana pudding calls for 2/3 cups of sugar for the flour and 1/4 cups of sugar for the meringue topping, how many cups of sugar is required to make that good banana pudding? Five friends want to split 6 1/4 pounds of candy amongst themselves.

Marty had 316 keys and Nick had 541 keys. After both of them lost the same number of keys, Nick had 6 times as many keys as Marty. How many keys did each of them lose?

40. ## math

if the product of five tenths and three tenths is subtracted from the sum of two tenths and six tenths what is the difference

41. ## Social Studies

What is a sentence that explains how the terms tributary and drainage basin are related

42. ## Math

Jon's test grades are 76,84,83 and 78.What does he need to make on his next test to have an 83 average?

43. ## Chem

2. Suppose a chemistry student made 2000. mL of 6.00 M HCl. He accidently spilled half of this solution on the floor. What is the Molarity of HCL left in the beaker? Explain the answer... - for this problem, would I use the eq'N, M1V1=M2V2. 3. What is the

44. ## CHEMHelp

Now sure how to do this! 1. DESCRIBE & CALCULATE how to make 750. mL of a 1.25 M sucrose solution 2. Concentrated HCl has a molarity of 12 M. DESCRIBE & CALCULATE how to make 1.50 L of a 3.00 M HCl.

45. ## Math

If 2 gulps = 5 slurps, and 2 slurps = 7 sips, then 35 sips is equal to how many gulps?

46. ## math

In Heather's class room there are red chairs,yellow chairs, and blue chairs. There are 3 red chairs. There are 4 times as many yellow chairs as red chairs, and there are 3 fewer blue chairs than yellow chairs. How many chairs are there in Heather's

47. ## Math

Oliver has one juice box. Lucy has one fewer juice box than oliver. How many juice boxes does lucy have?

48. ## Math

Ryan bought 2 1/4 pounds of almonds and divided them into bags with 1/8 pound in each bag.

49. ## Transformations ALGEBRA

write a function that is shifted 2 units up from the function f(x)=|x|+3 Write a function that is shifted 4 units down from the function f(x)=|x-3|+1

50. ## Physical science

How much more does someone with a bachlors degree usually earn than someone with a high school deploma?

51. ## Physical science

What are some of the reasons for income differences?

52. ## physics

A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 22.0 m/s. The cliff is h = 38.0 m above a flat horizontal beach, as shown in the figure below. How long after being released does the stone strike the

53. ## Algebra 1

-2, -12, -72, -432 find the 8th term 0.2, 1.6, 12.8, 102.4 find the 6th term 24, 12, 6, 3 find the 7th term

54. ## math

I have \$0.39. There is 1 more penny than nickel, and one more nickel than dimes. The coins are?

55. ## Physics

Also got lost on this question: A rescue plane wants to drop supplies to isolated mountain climbers on a rocky ridge 235m below. If the plane is traveling horizontally with a speed of 250 km/h (69.4 m/s), (a) how far in advance of the recipients

56. ## Physics

I'm having trouble where to start with this question.. Any help would be helpful. A projectile is fired with an initial speed of 75.2 m/s at an angle of 34.5° above the horizontal on a long flat firing range. Determine (a) the maximum height reached by

57. ## Physics

I did the problem but i'm confused on what to do next: 1.A hunter aims directly at a target (on the same level) 120m away. (a) If the bullet leaves the gun at a speed of 250m/s, by how much will it miss the target? (b) At what angle should the gun be aimed

58. ## Chemistry Really Confused!!

'm confused on how to set up the problem for each question.. 1.) Calculate the empirical formula of a compound if a 6.21 g sample contains 1.67g of cerium and the remainder iodine 2.) An unknown compound contains 85.64% carbon with the remainder hydrogen.

59. ## Chemistry

I'm confused on how to set up the problem for each question.. 1.) Calculate the empirical formula of a compound if a 6.21 g sample contains 1.67g of cerium and the remainder iodine 2.) An unknown compound contains 85.64% carbon with the remainder hydrogen.

60. ## physics!!! Damon?

The graph at the right is a positive vs. Time graph for the motion of an object moving along a horizontal (x) axis For each of the 8 1-second time intervals, describe the displacement, instantaneous velocity (+/- and whether the velocity is increasing or

61. ## Maths..

Uh...Yea... Sorry about this, but I"m trying to study and I need someone to walk me through, missed a lot of school. fyi, when there's a / its under the entire string before it until you hit the inequality symbol. Tony Bowled 135 and 145 in his first two

62. ## Math

A sport arena covers 710,430 square feet of ground. A newspaper reported that the arena covets about 700,000 square feet of ground. To what place value was the number rounded?

63. ## Algebra

Calvin deposits \$400 in a savings account that accrues 5% interest compounded monthly. After c years, Calvin has \$658.80. Makayla deposits \$300 in a different savings account that accrues 6% interest compounded quarterly. After m years, Makayla has

64. ## Algebra

An equation for the depreciation of a car is given by y = A(1 – r)t , where y = current value of the car, A = original cost, r = rate of depreciation, and t = time, in years. The value of a car is half what it originally cost. The rate of depreciation is

65. ## Physics

A pilot flying low and slow drops a weight; it takes 2.8 s to hit the ground, during which it travels a horizontal distance of 100 m . Now the pilot does a run at the same height but twice the speed. How much time does it take the weight to hit the ground?

66. ## Math

14 2 7 3 9=10 insert symbols to make it work 9*2 11 8 4 1=60

67. ## Socials

How did the building of the transcontinental railway benefit the country? I know that First Nations were kicked off their farmland to make way for the building of the railway and for settlers(why would settlers need the land?). Why was the railway so

68. ## math

The length of a rectangle is 3 m more than double the width, and the area of the rectangle is 54 m^2. Find the dimensions of the rectangle.

69. ## accounting

rigoberto invests 8,000 at 6% interest, compound semiannually for 1 year

70. ## accounting

rose wants to have 7,500 in 18 years how much rose should invest now at 8% interest

71. ## earthquake engineering

Hey everybody! I have a question I would like to share and ask you. We have a soil layer with medium gravel which has a depth of 38 m. We want to build a multi storey framed building safely with a fundamental period of 1.7 sec.Do you think it will be safe?

72. ## MATH

A carpenter has a board that is 10 feet long. He wants to make 6 table legs that are all the same length. What is the longest each leg can be? Thanks

73. ## research proposal

Hey I'm doing my research proposal for graduation I have 2 questions Q1. What should it inude exactly? I mean the headlines/ content) Q2. For the literature review, after dining articles what should I summarize/use from them? (Introducton, methodology or

74. ## Word Problem

The length and width of a rectangle are to each other as 4 is to 3. A second rectangle are 4 units longer and 2 units wider than the first one, and has twice as great an area as the first. Find the dimensions of the first rectangle.

75. ## Algebra

1/x+1/x+5+1/3x=1/2.25 Solve for x.

76. ## Algebra

There are three pipes in which a cistern can be filled. The second takes 5 hours longer than the first, the third three times as long as the first. If all are open the cistern can be filled in 2 and 1/4 hours. How long would it take each alone to fill the

77. ## Math

A monument consists of two cubical blocks of granite, the smaller resting on the larger. The total height of the monument is 5 feet, and the area of the exposed surface is 61 square feet. Find the dimensions of the blocks. Help please>.< Thank you in

78. ## Math

A confectioner perchased several boxes of candy for \$6. He gave five boxes to his children, and sold the rest at 10 cents more per box than he had paid for them, and made a profit of 25% on his original cost. How much did a box of candy cost him?

79. ## Math

For the first of two basketball games the price of each reserved seat was \$1.50,the price of each unreserved seat was 5 cents, and the number of reserved seats sold was 1/25 of the number of unreserved seats sold.If, at a second game, the price of the

80. ## Algebra

A passenger boat which travels 6 mph faster than a freighter required 3 days less time to make a trip of 2592 miles. Find the rate of the passenger boat.

81. ## Math

1-)A passenger boat which travels 6 mph faster than a freighter required 3 days less time to make a trip of 2592 miles. Find the rate of the passenger boat. 2-)For the first of two basketball games the price of each reserved seat was \$1.50,the price of

82. ## Help w/ Math PLS

If a, b, and c are three integers in geometric progression, prove that the number a^2+b^2+c^2 is exactly divisible by the number a+b+c.

83. ## Math

If a, b, and c are three integers in geometric progression, prove that the number a^2+b^2+c^2 is exactly divisible by the number a+b+c.

84. ## ALGEBRA

perimeter = 24 feet triangle that have one side is b =? second side is b =? third side is b - 3 =? How to solve this problem?

85. ## math

How many faces, edges, and vertices does the solid figure have? image

86. ## Math

Explain how you would convert a measurement given in ounces into pints

2-Eric and Frank want to equally share 4/3 feet of rope. what length of rope should each friend get? Explain how to use a drawing to help solve the problem.

88. ## Physics

A particle P travels with constant speed in a circle of radius 7.3 m and completes one revolution in 34.0 s (see Figure). The particle passes through O at t = 0 s. What is the magnitude of the average velocity during the interval from t = 11.9 s and t =

89. ## Physics

A cork gun contains a spring whose spring constant is 18.0 N/m. The spring is compressed by a distance ∆X = 6.0 cm and used to propel a cork of mass 7.66 g from the gun. Assuming the cork is released when the spring passes through its equilibrium

90. ## Nutrition

what are the principles of standing height and weight in the nutritional assessment? note: standing height and weight are from the anthropometric measurements i really need some help i couldn't find or understand what it actually wants so please some help.

91. ## statistics

How do you calculate the z-score for a package weighing 29.6 pounds ( round to 2 decimals)?

92. ## math

write the direct variation equation for the following:y varies directly with x and y=60 when x=10

93. ## chemistry

the molar mass of NaOH is 40g/mol, how many grams ofNaOH are required to yield 0.65 mol?

94. ## math

oliver can jog about 3 times as fast as he can walk. If his average walking rate is one mile in 20 minutes, about how far could he jog in 2 hours?

95. ## Chemistry

Kinetic energy = 1/2 mv^2 where m is the mass of the particle and v is the velocity of the particle. A joule is the SI unit for energy and is kg.m^2/s^2. Find the energy in joules of a 56.7 g mass moving at the speed of 70. km. hr.

96. ## CHEM HELP ANYONE ASAP

Arrange the members of the following set of cations in order of increasing ionic radii: Sr2+ Ba2+ Rb+ K+ I understand that Sr2+ = 132 pm Ba2+ = 149 pm Rb+ = 166 pm K+ = 152 pm increasing ionic radii ....Sr2+ , Ba2+ , K+, Rb+ But the its not going in online

97. ## mathmatics

write an expression that represents the following: Eds salary is S dollars per week. His salary is tripled and he earns a \$250 bonus. how much will he have in 13 weeks

98. ## pre-calculus

find all values of x in (o, Pi) that satify the given equation cos x/3=1/2

99. ## pre-calculus

Rewrite the expression so that it involves the sum or difference of only constants and sines and cosine to the 1st power (cos 5x)^2