# Questions Asked onJanuary 17, 2011

1. ## 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.

2. ## chemistry

three student chemists measured 50.0 mL of 1.00 M NaOH in separate Styrofoam "coffee cup" calorimeters ( Part B). Brett added 50.0 mL of 1.10 M HCI to his solution of NaOH; Dale added 45.5 mL of 1.10 m HCL 9 eqaul moles) to his NaOH solution. Lyndsay added

3. ## chemistry

On average, earth's crust contains about 8.1% aluminum by mass. If a standard 12-ounce soft drink can contains approximately 15.0g of aluminum, how many cans could be made from one ton of the Earth's crust?

4. ## physics

A motorist drives along a straight road at a constant speed of 15.0 m/s. just as she passes a parked police officer,the officer starts to accelerate at 2.00 m/s^2 to overtake her. assuming the officer maintains this acceleration, a) determine the time it

5. ## mat h

ms. buxx invested a total of \$2000 in two savings accounts. The first account pays 3% interest per year and the second account pays 5% interest per yera. If the interest from both accounts totals \$84 per yera, how much is invested in each account?

6. ## chemistry

Titanium is used in airplane bodies because it is strong and light. It has a density of 4.55 g/cm^3. If a cylinder of titanium is 7.75 cm long and has a mass of 153.2 g, calculate the diameter of the cylinder. (V=pi*r^2*h, where V is the volume of the

7. ## chemistry

An explosive whose chemical formula is C3H6N6O6 produces water, carbon dioxide, and nitrogen gas when detonated in oxygen. write the chemical equation for the detonation reaction of this explosive.

8. ## chemistry

Use delta ( + or - ) to show direction of expected polarity? for each of the bonds indicated. do you use electronegative numbers? how? I know the answers (i have the book) i just want to know how im supposed to know it for a test. a) H3C - CL b) H3C - NH2

9. ## chemistry

The solubility of NaCl in water is 35.7 g NaCl/100 g H2O. Suppose that you have 500.0 g of NaCl. What is the minimum volume of water you would need to dissolve it all? The density of water is 1.0 g/mL.

10. ## physics

Consider the 45 N weight held by two cables shown below. The left-hand cable is horizon- tal. a) What is the tension in the cable slanted at an angle of 50? Answer in units of N. 007 (part 2 of 2) 10.0 points b)What is the tension in the horizontal cable?

11. ## Physics

Time intervals measured with a stopwatch typically have an uncertainty of about 0.2 s, due to human reaction time at the start and stop moments. What is the percent uncertainty of a handtimed measurement of (a) 5 s, (b) 50 s, (c) 5 min?

12. ## physics

A 15kg model plane flies horizontally at a constant speed of 12.5 m/s and the kinetic energy is 1171J and the potential energy is 3000J what is the new horizontal velocity? Please show work and explain.

13. ## Geometry

If the boy is 4' 9" tall and his shadow is 6 ft. and the shadow of the flagpole is 19 ft., determine the height of the flagpole (to the nearest tenth).

14. ## Physics

Two charged particles exert an electrostatic force of 27 N on each other. What will the magnitude of the force be if the distance between the two charges is increased to three times the original distance?

15. ## Physics

Two points charges of 2uC and -6uC are located at the position(0.0)m and (0.3)m.Calculate the total electrical potential at the point (4.0)m due these two charges.

16. ## Calculus

log3 x-log3(1-x)=3

17. ## Physics

Two charged particles exert an electrostatic force of 27 N on each other. What will the magnitude of the force be if the distance between the two charges is increased to three times the original distance?

18. ## home economics

examples of career in home economics

19. ## physics

A box of mass 65 kg hangs motionless from two ropes, as shown in the diagram above. The angle is 40 degrees. Choose the box as the system. The x-axis runs to the right, the y-axis runs up, and the z-axis is out of the page. What is the y-component of the

21. ## physics

Calculate the torque about the front support of a diving board, exerted by a 70 kg person 3.0 m from that support. (Take the positive direction to be clockwise.)

Which of the following statements is generally not true about state intermediate appellate courts? A. Appellate court decisions are final and further appeal is not possible. B. The appellate court reviews the record of the trial court. C. The appellate

23. ## physics - electric field

a point particle with charge q= 4/5 uC is placed on the x-axis at x=-10cm. A second particle of charge Q is now placed on the x-axis at x = 25cm, and its found that the electric field at the origin is zero. Find Q.

24. ## social studies

ineed the location of egypt this is what i wrote so far, Ancient Egypt, civilization that thrived along the Nile River in northeastern Africa for more than 3,000 years, from about 3300 BC to 30 BC. It was the longest-lived civilization of the ancient

25. ## 5th math

If a spinner is divided into 8 congruent sectors what is the sample space ? there a 2 1's, 2's. 3's and 4's that make up the segments

26. ## chemistry

Carbon disulfide,CS2, is a volatile, flammable liquid. It has a vapor pressure of 426.6 mmHg at 29.8C and 760.0 mmHg at 46.5C. What is the heat of vaporization of this substance?

27. ## physics

a boy with a mass of 60kg climbs a 10m vertially up a ladder. A) how far did he travel? B) how much work is done? C) what are the energy changes here?

28. ## physics

A uniform ladder of mass m and length L leans at an angle θ against a frictionless wall. If the coefficient of static friction between the ladder and the ground is 0.43, what is the minimum angle at which the ladder will not slip? Do i use the equation

29. ## Calc

A mass is oscillating on the end of a spring. The distance, y, of the mass from its equilibrium point is given by the formula 2zcos(14πwt) where y is in centimeters, t is time in seconds, w and t and are positive constants. What is the furthest distance

30. ## Physics

How much heat is required to raise the temperature of 70 g of water from 20 C to 80 C?

31. ## Physics

How much heat must be added to 60 g of ice at 0 C to melt the ice completely?

32. ## Chemistry

how many grams of oxygen are in 213.5g Fe2O3?

33. ## chemistry

What amount of water in liters could be heated from 20.0 to 42.0 by the car's energy? (One calorie raises the temperature of 1 of water by 1.)

34. ## annuities

8. Mary would like to save \$10 000 at the end of 5 years for a future down payment on a car. How much should she deposit at the end of each week in a savings account that pays 12%/a, compounded monthly, to meet her goal? a. What type of annuity is this? c.

35. ## math helper plese

2 isosceles triangles have the same height. The slopes of the sides of triangle A are double the slopes of the corresponding sides of triangle B. How do the lengths of their bases compare? A. The base of A is quadruple that of B. The base of A is double

36. ## calculus

Suppose that the sales at Borders bookstores went from 70 million dollars in 1989 to 415 million dollars in 1993. What is the continuous percent growth rate, per year, of sales?

37. ## Math

4. Vanna has just financed the purchase of a home for \$200 000. She agreed to repay the loan by making equal monthly blended payments of \$3000 each at 9%/a, compounded monthly. c. How long will it take to repay the loan? d. How much will be the final

38. ## biology

which process most likely caused the change in CO2 level in the flask over the lasy 37 minutes?

39. ## Calc

A mass is oscillating on the end of a spring. The distance, y, of the mass from its equilibrium point is given by the formula 2zcos(14πwt) where y is in centimeters, t is time in seconds, w and t and are positive constants. What is the furthest distance

40. ## Math

A class has 2 rows of 8 seats each. there are 14 students 4 of whom always sit in the front row and 5 of whom always sit in the back row. How many ways can the students be arranged?

41. ## physics

A novice golfer on the green takes three strokes to sink the ball. The successive displacements are 4.00m north, 2.00m northeast, and 1.00m at 30.0 degrees west of south starting at the same initial point, an golfer could make the hole in what single

42. ## Linear Algebra

For which values of 'a' will the following system have no solutions? Exactly one solution? Infinitely many solutions? x + 2y - 3z = 4 3x - y +5z = 2 4x + y + (a^2-14)z = a+2

43. ## math

a color called "passion purple" is made by mixing 5 oz of red paint with 9 oz of blue paint. what percent of passion purple is blue paint?(round to the nearest percent.)explain how you got the answer

44. ## math

6. A lottery offers two options for the prize. Option A: \$1000 a week for life Option B: \$ 600 000 in one lump sum. The current expected rate of return for large investment is 7%/a, compounded weekly. a. Which option would the winner choose if s/he expects

45. ## Phsyics

Is an object with a temperature of 273.2 K hotter than, colder than, or at the same temperature as an object with a temperature of 0'C? I don't know how to convert kelvin to celcius.

46. ## chemistry

Methanol, CH3OH, a colorless, volatile liquid, was formerly known as wood alcohol. It boils at 65.0C and has a heat of vaporization of 37.4kj/mol. What is its vapor pressure at 39.0C?

47. ## physics

Here is the problem and answers. how do i reach the answer? A car at the Indianapolis-500 accelerates uniformly from the pit area, going from rest to 325 km/h in a semicircular arc with a radius of 198 m. Determine the tangential acceleration of the car

48. ## math

Camilla has 3 times as many points as Lynn. Lynn has 5 more points than Kim. Camilla, Lynn, and Kim combined have twice as many points as Jasmine. If Jasmine has 25 points - how many points do the three other girls have?

49. ## physics

Water is running out of a faucet, falling straight down, with an initial speed of 0.50 m/s. At what distance below the faucet is the radius of the stream reduced to one-half its value at the faucet?

50. ## physics

Diego pulls a 4.5 kg sled across level snow with a force, F, of 200 N on a rope that is 35.0° above the horizontal. If the sled moves a distance of 67.5 m, how much work does Diego do?

51. ## chemistry

A sample of crude oil has a density of 0.87g/mL. What volume in liters does a 3.6-kg sample of this oil occupy?

52. ## magee

Whenever you use a inclined plane a. deis ezual to dr b. dris zero, c. deis less than dr, d. de is greater than dr

53. ## Physics

A proton is released from rest in a uniform electric field which is directed along the x axis and of magnitude E=2*10exponent5 V/m.The proton undergoes a displacement from point A at the origin to point B at x=0.2m.What is the change in the potential

54. ## Math (Algebra 2)

Use long division to find the quotient and remainder when f(x)= 15 x^4 - 9 x^3 - 18 x^2 + 24 x + 18 is divided by g(x)= 3 x + 1

55. ## Economics

Suppose the demand curve for a monopolist is Qd = 500 – P, and the marginal revenue function is MR = 500 -2Q. The monopolist has a constant marginal and average total cost of \$50 per unit. A. Find the monopolist’s profit- maximizing output and price.

56. ## Physics

Two forces act concurrently on a point P. One force is 60nt due east. The second force is 80nt due north. (a) Find the magnitude and direction of their resultant. (b) What is the magnitude and direction of the equilibriant?

57. ## Algebra 2

A big beach towel has a width that is 3 feet less then it's length. If the towel's area 28 square feet, what is it's length?

58. ## alg 2

a rectangle is to be inscribed in a isosceles triangle of height 8 and base 10. Find the greatest area of such rectangle.

59. ## 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

60. ## Physics

Two electrostatic point charges of +60.0 uC and +50.c uC exert a repulsive force on each other of 175 N. What is the distance between the two charges? So let's say I use Coulomb's law would the repulsion of 175 N be considered the equivalent of the

61. ## Psychology

identify the major similarities and differences that exists between the American and European traditions of psychology. Please post a response to this message that includes at least two similarities and two differences

62. ## Pattern

Suppose you plan to save \$12 per week.You have already saved \$7.50.In how many weeks will you have saved at least \$100?

63. ## Chemistry Lab

Determine the ionization energy of a hydrogen atom (in kJ/mol) if the electron is in its ground state. (Hints: Use the Rydberg equation, remember E=hc for a single H atom, and R=109678x10–2nm–1 ) _____ kJ/mol Thanks :)

64. ## physics

A block weighing 6.8 N requires a force of 2.9 N to push it along at constant velocity. What is the coefficient of friction for the surface?

65. ## chemistry

Given the following equation: Mg(s)+2HCl(aq) goes to MgCl2(s)+H2(g) How many grams of hydrogen chloride (HCl) are needed to produce 200g of hydrogen H2?

66. ## Chemistry Lab

Complete the table below: The hydrogen emission spectrum has four series (or sets) of lines named Balmer, Brackett, Paschen, and Lyman. Indicate the energy (infrared, ultraviolet, or visible), the nf value for each series, and all possible ni values up to

67. ## St.Nicholas Adult High School (English)

the sentence'15%of adult height is added during teen years." Ineed response and explaination. I'am so confused about that question.

68. ## calculus

A bug walks along the circle x^2 + y^2 = 4. When it is at the point (1, (3)^1/2)), dx/dt = 2. Find dy/dt at this instant.

69. ## Economics

Suppose the demand curve for a monopolist is Qd = 500 – P, and the marginal revenue function is MR = 500 -2Q. The monopolist has a constant marginal and average total cost of \$50 per unit.

70. ## physics

a 150g-iron ball at 95 Celsius is dropped into a cavity in a block of ice

Meagan bought a book for \$12.00, received an allowance of \$15.00, paid back a loan of \$7.00, bought lunch for \$8.50, earned \$8.00 raking leaves, and found \$2.00. She now has \$22.25. How much did she start with? Help me please. Thank you!

72. ## physics - electric field

a point particle with charge q= 4/5 uC is placed on the x-axis at x=-10cm. A second particle of charge Q is now placed on the x-axis at x = 25cm, and its found that the electric field at the origin is zero. Find Q.

73. ## alegebra 2

12x+20y+15z=-60

74. ## math

Omar wants to buy a double scoop ice cream cone. His favorite flavors are vanilla, strawberry, raspberry and chocolate. A combination with both scoops of raspberry represents ___ out of ___ possible combinations.

75. ## social studies

6. Stabilization policies can best be described as policies that: A. attempt to eliminate recession and/or inflation in the economy. B. use changes in government spending to promote an equitable income distribution. C. use changes in the money supply to

76. ## science

if an acid has a pH of 1.1 what is the hydrogen ion concentration of the solution expressed in scientific notation to 3 significant figures, for my answer can it be written 1 x 10^-1.1 mol dm3? or can you not use decimals in the to the power of so should i

77. ## alg 2

a rectangle is to be inscribed in a isosceles triangle of height 8 and base 10. Find the greatest area of such rectangle.

78. ## Science

How do you calculate the total magnification of a microscope, using the eyepiece magnification and the objective magnification?

79. ## chemistry

Mercury has a density of 13.6 g/mL. What is the mas of 4.72 L of mercury?

80. ## physics

Identical +3.07 µC charges are fixed to adjacent corners of a square. What charge (magnitude and algebraic sign) should be fixed to one of the empty corners, so that the total electric potential at the remaining empty corner is 0 V?

81. ## Math

Mary drove from Amity to Belleville at a speed of 50 mph. On the way back, she drove at 60 mph. The total trip took 4 2/5 hours of driving time. Find the distance between these two cities. Any help would be greatly appreciated! =]

82. ## math

a picture frame containing a photogragh is 11 inches wide and 14 inches high. a mat around the photograph is 1 1/2 inches wide on all sides. what are the dimensions of the photograph? do you want to add or subtract from each side?

83. ## calculus

The first derivative of the function f is given by f'(x) = (cos^2x)/x - 1/5 How many critical values does f have on the open interval (0,10)?

84. ## Algebra II

The base of a triangle is 8 cm greater than the height. The area is 24cm^2. What is the base and height?

85. ## Math

Kate's plane leaves at 3:35 P.M. She has to check in 2 h and 35 min to get to the airport from her home. Kate must first drop off her dog, Fido, at her friend's house next door. She wants to spend 45 min talking to her friend. What is the latest time she

86. ## Chemistry

How much heat (in BTU) would be required to heat and vaporize 100 lb of water from 25°C to saturated steam at 1 atm? Assume heat capacity is constant at 1 BTU/lb-°F and the latent heat of vaporization is 1,000 BTU/lb. Also, what is the temperature of the

87. ## math

a color called "passion purple" is made by mixing 5 oz of red paint with 9 oz of blue paint. what percent of passion purple is blue paint?(round to the nearest percent.)

88. ## chemistry help

a kilogram of aluminum metal and a kilogram of water are each warmed to 75 degree celisus and placed in two identical insulated containers. one hour later, the two containers are opened and the temperture of each substance is measured. the aluminum has

89. ## chemistry

which is the symbol for the following monatomic ion? 8 protons and 10 electrons

90. ## algebra

Suppose that Maria has 140 coins consisting of pennies, nickels, and dimes. The number of nickels she has is 9 less than twice the number of pennies; the number of dimes she has is 19 less than three times the number of pennies. How many coins of each kind

91. ## chemistry

The heat of vaporization of a substance is 2900 J/g at its boiling point of 313C. How much of this substance can be vaporized if 58700 J of energy are available?

92. ## Statistics for the Behavioral and Social Sciences

Using a t test for dependent means based on .05 significance level, what is the power of each studies. Study Effect size N Tails (a) Small 20 one (b) Medium 20 one (c) medium 30 one (d) medium 30 two (e) large 30 two

93. ## Statistics

This is my first time taking statistics, please help me with the problem step by step. A sample of 20 pages was taken without replacement from the 1,591-page phone directory Ameritech Pages Plus Yellow Pages. On each page, the mean area devoted to display

94. ## computer science

Write a program that prompts the user to input three numbers. The program should then output the numbers in non-descending order

95. ## geometry

Triangle PQR has vertices P(0,12) Q(7,11) ans R(-2,2) Find the eaquation of the triangles median through point Q

96. ## physics

a tennis ball when thrown from a height 2m horizentally,it touchs the net at a distance 15m and hits the grownd at a distance 25m . what is the heigth of the net?

97. ## PHYSICS II

A uniform electric field of magnitude 3.00×10^4 N/C makes an angle of 37 degrees with a plane surface of area 1.40×10^−2 m^2. What is the electric flux through this surface? i got 321 using the formula electricflux = E A Cos(theta), but it's wrong.

98. ## chemistry

Assume that the kinetic energy of a 1600 kg car moving at 125 km/h is converted entirely into heat.How many calories of heat are released?

99. ## Math

Karen is 63 inches tall and casts a shadow that is 32 inches long. At the same time, a tree casts a shadow that is 81 inches long. How tall is the tree?

100. ## Chemistry-DrBob222

A certain compound contains carbon, hydrogen , and oxygen. When 1.00 grams of this compound are burned in oxygen gas 1.47 grams of CO2 and 0.600 grams of water are formed. When 2.75 grams of the compound are dissolved in 10.0 grams of water the resulting

101. ## Chemistry

"The analyzer said that at 20degreesC the unknown gas was 82.8% carbon by weight and 17.2% hydrogen. The analyzer also diffused the gas through a special apparatus and measured the rate of its diffusion compared to how fast oxygen gas diffused under the

102. ## English

The questions says, he is always late unfortunately. Late is the word underlined. Is late an adjective ?

103. ## Algebra

On three consecutive passes, a football team gains 5 yards, loses 31 yards, and gains 29 yards. What number represents the total net yards?

104. ## Math/Trig

Find the radius of a circle with a central angle of pi/7 and a length of the intercepted arc equal to 7.7 cm. Round your answer to the nearest tenth.

105. ## MaTh = Algebra = help

Solve this system of linear equaiton by an algebraic method. So If I had to solve this the elimination method way, how would I do it? x-2y = 10 3x-y = 0

106. ## physics

A suspension bridge supported by a cable 100ft long has a sag of 10ft at its center. If the bridge has a weight of 20,000 lbs and its center of mass is the center of the bridge, what is the tension on the cable?

107. ## Chemistry

"The analyzer said that at 20degreesC the unknown gas was 82.8% carbon by weight and 17.2% hydrogen. The analyzer also diffused the gas through a special apparatus and measured the rate of its diffusion compared to how fast oxygen gas diffused under the

108. ## calculus

A cylindrical metal can with an open top is to be constructed. the can must have a capacity of 24pie cubic inches. the metal used to contruct the bottom of the can costs 3 times as much as the metal in the rest of the can. Find the dimensions(radius and

109. ## alg 2

a rectangle is to be inscribed in a isosceles triangle of height 8 and base 10. Find the greatest area of such rectangle.

110. ## Math

In a mathematics olympiad there are 20 finalists. In how many ways can three equal prizes be awarded, assuming that two prizes cannot be given to one finalist? In how many ways can a first, second and a third place be awarded? (I understand that

111. ## Math

The length of a rectangle is twice its width if the area of the rectangle is 200 m squared, find its perimeter.

112. ## ALGEBRA!!!!

16p³+12p²+20p+15

113. ## annuities

7. Find the nominal interest rate that is equivalent to 18%/a, compounded quarterly, if interest is paid monthly.

114. ## Psychology

is there a difference betweeen mentally handicapped and mentally retarted?

115. ## calculus

A bug walks along the circle x^2 + y^2 = 4. When it is at the point (1, (3)^1/2)), dx/dt = 2. Find dy/dt at this instant.

116. ## physics

An animal-rescue plane due east at 50 meters per second drops a bale of hay from an altitude of 62 meters. The acceleration due to gravity is 9.81 meters per second squared. If the bale of hay weighs 191 newtons what is the momentum of the bale the moment

117. ## Biology help :(

Place the following process in the correct order. a) urine is stored in the bladder. b) blood enters the afferent arteriole. c) fluids pass from the glomerulus into Bowman's capsule. d) urine is excreted by the urethra. e) sodium ions, glucose and amino

118. ## physics

The rafters of a roof meet at an angle of 120 degrees. What force is exerted along the rafters by an object weighing 6000nt suspended from the peak?

119. ## Chemistry Lab

Infrared, ultraviolet, and visible radiation are all part of the electromagnetic spectrum. Arrange the three types of radiation in order of increasing energy. Note: Use only infrared, ultraviolet, or visible for your answers. Lowest: ___

120. ## Chemistry Lab

The Rydberg equation (1=Rni 2–Rnf 2) can be treated as a line equation. What is the value of nf as a function of the slope (m) and y-intercept(b)? A. mb B. –mb2 C. (mb)12 D. (–mb)12 E. (mb)12 F. None of these are correct. Thank you :)

121. ## Math

Megan bought a book for \$12.00, received an allowance of \$15.00, paid back a loan of \$7.00, bought lunch for \$8.50, earned \$8.00 raking leaves, and found \$2.00. She now has \$22.25. How much did she start with? Please I need help. Thank you

122. ## Chemistry

See bottom Patrick A certain compound contains carbon, hydrogen , and oxygen. When 1.00 grams of this compound are burned in oxygen gas 1.47 grams of CO2 and 0.600 grams of water are formed. When 2.75 grams of the compound are dissolved in 10.0 grams of

123. ## idk

How many moles of carbon tetrachloride are in 51.0 grams?

What is the difference between the terms rotation and revolution? I need to use the Earth to support my answer.

125. ## St.Nicholas Adult High School (English)

the slogan "got milk'. Ido not the what this question means. can tell me the answer please thank you,

126. ## Physics

a person stands a distance of 0.300 meters from the right end of a 2.00 meter long uniform platform that is supported by two posts, one at each end. The board has a mass of 20.0 kg and the person's mass is 75.0 kg. a. determine the force exterted on the

127. ## world history

Prehistory ended with the invention of what?

128. ## Math

If the 3 sides of a triangle have lengths 9m, 12m, and 15m, what is the area of this triangle?

129. ## trig

A ladder leans against a house at a point 19 feet high. The ladder is 25 feet long. What is the measure of the angle formed by the ladder against the house?

130. ## Comm215

In this problem: Sally told Janice that she made the honor role. __ Pronoun shift in number __ Pronoun shift in person __ Ambiguous reference __ No error What does ambiguous reference mean?

131. ## chemistry

a kilogram of aluminum metal and a kilogram of water are each warmed to 75 degree celisus and placed in two identical insulated containers. one hour later, the two containers are opened and the temperture of each substance is measured. the aluminum has

132. ## chemistry

Assume that the kinetic energy of a 1600 car moving at 125 is converted entirely into heat.How many calories of heat are released?

133. ## PHYSICS II

When two identical ions are separated by a distance of 4.0×10^−10 , the electrostatic force each exerts on the other is 5.7×10^−9 . How many electrons are missing from each ion? what i did was used coulombs law to find the value of q1 and q2 , so

134. ## physics

what is the maximum acceleration equation?

135. ## science

Can you give me awebsite about phase change?

136. ## algebra

Cat Years 1 3 4 6 7 Human Years 13 33 43 63 73 What is the meaning of the slope? Write the slope-intercept form of the equation for the line of fit. Use linear interpolation and your line of fit to estimate the number of human years which will correspond

137. ## physics

A lawn roller is pushed across a lawn by a force of 127 N along the direction of the handle, which is 22.5° above the horizontal. If 64.3 W of power is developed for 90.0 s, what distance is the roller pushed?

138. ## com

what would be the verb and its tense: Successful financial planning can be improved through good education.

139. ## Math

What is the value of x? A isosceles triangle: bottom - x+3 one side - 2x+5 other side - 3x+2

140. ## biology

Why might people in the United States be more likely to be malnourished as compared to undernourished? What is the difference between the two and why is this important to know?

141. ## chemistry

A girl is celebrating her seventh birthday. Each guest is served one large slice of chocolate cake, a hamburger, French fries, and some oranges. Identify the food groups mentioned above. If one slice of chocolate cake contains 35g of carbohydrate, 15g of

142. ## calculus

Put the function P=15(1.1)^t in the form Pe^kt

143. ## social studies- geography

75% of the active volcanoes are found along the west coast of N. America and east coast of Asia to New Zealand and is often called:

144. ## math

Using the formula for the area of a triangle, A = 1/2 bh, find the area of this triangle pictured. The base is 2x + 16 and the height is 4x. I just don't know how to work the problem.

145. ## Math

The morrison family bought a car for \$22,000 which was financed at \$600 per month for 40 months. The down payment was \$3,000. What is the installment price? What is the financial charge and amount financed?

146. ## calculus

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

Hi. I wanna ask you one question. "Why is the spelling of the hockey team The Toronto Maple Leafs unusual?" If you can answer I gonna be happy.

148. ## Math

Yuki made cookies on Monday. Some friends came over and ate half the cookies on Tuesday. on Wednesday, Yuki ate three cookies, and on Thursday, she took two cookies to school. By Friday, Yuki had seven cookies left. How many did she bake on Monday? Thank

149. ## history

What is Johnson’s thesis regarding Sam, the Market Revolution, and antebellum American society in the book Sam Patch?

150. ## English

The teacher will talk about homeless in Florida. Or is it better to write it this way? The teacher will speak about homeless in Florida.

151. ## Science

How are weathering and erosion related?

152. ## math

what is the solution sets of the following a) 2x^2-7x-5 b) 5y^2-16y+3 c) 4y^2+5y-6 d) 10x^2-13x+4 e) 12y^2-11y-5 f) 10c^2-21c+9 g) 3m^2+5m-2 h) 12x^2+19x+5

153. ## Math

abcd is a square, and point e lies along side ab so that ae is three times as long as eb. To the nearest degree, what is measure of angle ecb?

154. ## chemistry

Mercury has a density of 13.6 g/mL. What is the mass of 4.72 L of mercury?

155. ## science

Why doesn't the sand from california beaches' result in froth and bubbles when you pour vinegar on it?

156. ## physics

Compare the gravitational force on a 35 kg mass at the surface of the Earth (with radius 6.4 × 10 6 m and mass 6 × 10 24 kg) with that on the surface of the Moon  with mass 1 81.3 ME and radius 0.27RE  . What is the force on the moon?

157. ## Science

1. I got a list of solutions. We did a test in the lab to figure out what was there pH. How do you figure out which one is the most acidic and the most basic? 2.When might you need to know whether a solution is acidic or basic? 3. Dishwasher detergent,

158. ## Math

Solve. 3p-1=5(p-1)-2(7-2p)

159. ## Math

How many possible regular polyhedrons (platonic solids)?

160. ## math

A koala sleeps an average of 22 hours each day about how many hours does a koala sleeps in a year?

161. ## Math

When you look out over an unobstructed landscape or seascape, the distance to the visible horizon depends on your height above the ground. The equation d=3/2h is a good estimate of this, in which d=distance to horizon in miles and h=height of viewer about

162. ## social studies

port cities sutch as boston philadelphia and new york make the northeast a?

163. ## literature

in a pair of silk stockings the silk stockings are a symbol of

164. ## money and banking

Consider a coupon bond that pays \$105 every year and repays its principal amount of \$1,500 at the end of 7 years

165. ## Calculus

lnx+ ln (x+3)= 2ln2

166. ## Algebra

Using the following six digits, 1, 2, 4, 6, 8, and 9, fill in the blanks below to make the maximum product that you can. Use each digit only once. How does an understanding of place value help determine the best solution to this problem?

167. ## Algebra

Solve: 3x-2y=10 2x+3y=-2 Graph: Substitution: Elimination: Show Your work! (I can'tfigure out how to graph it and when i used substitution and elimination it came out with two different anwsers. I got (13/3.5,19/10.5) for substitution, and ((0.2,-0.8) for

168. ## PHYSICS II

When two identical ions are separated by a distance of 4.0×10^−10 , the electrostatic force each exerts on the other is 5.7×10^−9 . How many electrons are missing from each ion? what i did was used coulombs law to find the value of q1 and q2 , so

169. ## English

i have to write a character sketch essay on the protagonist OR antagonist for the book Royally Jacked & i picked Valerie Winslow && i need a thesis Statement for it ? And its due in a day ! and i need help Please Help Me . ~ Thank You .

170. ## health, safety, and nutrition for the young child

a child who moved from throwing a ball using only an elbow movement to throwing a ball using her elbow, wrist, and shoulder is showing signs of _____ development. (a)intertask (b)spatial (c)joint-plate (d)intratask

171. ## MATH HELP

A line with an undefined slope passes through the points (-2,1) and (p, q). Which of the following points could be (p, q)? A. (1,0) B. (0,1) C. (0,-2) D. (-2,0) Help Me, I do not know how to figure this out????? A person tried helping me with this, but I

172. ## Science

How many electrons are present in the outer shell of each element?

173. ## Biology

Your research team suspects that lactose intolerance is a recessive trait. Which of the following observations would contradict your theory? a) Two lactose intolerant parents always have children who are lactose intolerant b) Genetic analysis shows that

174. ## biology

what cgange occurred in the shape of the horse from hyracotherium to equus?

175. ## physics

A passenger riding on a train moving over a bridge with a velocity of 55m/s, drops a pen out of the window. the pen lands in the river below 2.4 seconds later. A. find how high the window was above the water. B. how far forward did the pen move?

176. ## biology

Who discovered DNA was it James Watson and Francis Crick or Friedrich Miescher ? thankyou

177. ## Math

Solve integration using u substitution of (x+1)sqrt(2-x)dx

178. ## social studies

when did the slave trade end ? what did many people think(and hope) would happen to slavery ?

179. ## Physics

if a ball is thrown straight upward and is caught 5s after being thrown,how fast must it have been going when it left the person s hand?help

180. ## Math

If find RX = 2y + 2x, TX = 3y - 1, and SU = 28, FIND THE VALUES OF X AND Y

181. ## chemistry help

a kilogram of aluminum metal and a kilogram of water are each warmed to 75 degree celisus and placed in two identical insulated containers. one hour later, the two containers are opened and the temperture of each substance is measured. the aluminum has

182. ## chemistry

Calculate the total mass of gold needed to react with 4200g of chlorine to make 7112g of gold(iii) chloride?

183. ## biology

Most homeostatic mechanisms are controlled with a negative feedback loop. Explain why this mechanism may be more efficient at maintaining homeostasis as compared to positive feedback mechanisms. Provide examples of both to illustrate.

184. ## science

What was Hippocrates famous for?

185. ## physics

What force must be exerted to prevent a truck weighing 15 tons from rolling down an inclined plane which makes an angle of 3 degrees with the horizontal.

186. ## chemistry

Caluclate the total mass of copper needed to react with 100g of iodine to make 512g of copper(ii) iodide. PLEASE work it out for me idk how to do it ?

187. ## science

How do you improve the reactivity of a metal which does not easily react with water?

188. ## Math

Find the area of a rectangle if its length is 5x+10 and its width is 5x-5

189. ## Math

What is the circumference of a circle with a diameter of 10 m.

190. ## physical science

the attraction or pull of a person"s body toward the earth by the earth is called weight.the reaction to this force is the:

191. ## world history

The Hull house is an example of ______?

192. ## Linear Algebra

Express the solutions of the following systems in terms of the free variables: x1 + 3*(x2) - 2*(x3) + 2*(x5) = 0 2*(x1) + 6*(x2) - 5*(x3) - 2*(x4) + 4*(x5) - 3*(x6) = -1 5*(x3) + 10*(x4) + 15*(x6) = 5 2*(x1) + 6*(x2) + 8*(x4) + 4*(x5) + 18*(x6) = 6

193. ## physics

A cylindrical glass is 6cm wide. When you look from above at an angle you see the edge of the bottom of the glass. When the glass is then filled with water (1.33) you see the center of the bottom of the glass. How tall is the glass?

194. ## math

how do you find the perimeter of four and one half , three and one half , three and two thirds ,two and two thirds and eight feet and one feet

195. ## Math

In a circle, the measure of an inscribed angle is one-half the measure of its intercepted arc. Is this true or false?

196. ## Psychology final

Informational Interview Your final project for this course will be a 3- to 5-page paper that consists of the insights you have gained about yourself, your experience with this course, and the information you learned about your career choice during your

197. ## MATH

Mike wants to buy a snowmobile. His parents decide to lend him \$9 000 at 10%/a, compounded monthly, if he agrees to repay the amount by making equal monthly (at the end of the month) payments for five years. d. Write the series that represents the present

198. ## Health

Should mentally handicapped people be allowed to have children?

199. ## social studies-geography

the st. lawrence seaway connects these two bodies of water

200. ## calculus

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

201. ## Chemistry

When 0.855 g of this solid was dissolved in 7.50 g of napthalene, the solution had a freezing point of 78.0° C. The pure solvent freezes at 80.0° C; its molal freezing point constant is 6.8° C/m. What is the molecular formula of the compound?

202. ## economics

what are the non-monetary benefits of growing tobacco, of working as a plumber's assistant, and of working as a carpenter during the spring and summer and storing travel trailers for a local campground and selling oysters during the fall and winter?

203. ## Math

What is the circumference of a circle with a diameter of 10 m.

204. ## math(algebra 1)

how do u answer this? please step by step *graph and check to solve the linear system y=-x+3 y=x+1 Thank you very very much!!! :)

how many square feet are needed to cover one square yard? would it be 108 sq ft also would .26 rounded to the nearest hundredth be .30

206. ## stats

Suppose i am interested in the average price of books at a bookstore. i randomly pick 15 books.? i calculate the average of those, report my findings to the newspaper. can you identify the following: a. the population under consideration b. the parameter

207. ## College Algebra II

When you look out over an unobstructed landscape or seascape, the distance to the visible horizon depends on your height above the ground.

208. ## Math

The circumference of a circle with radius r is πr2 Is this true?

209. ## geometry

the perimeter of a square lot is seven times the length of a side, decreased by 12. fine the length of a side.

210. ## Math

The area of a square field is represented by the trinomial x^2-10x+25. Write an expression that would represent the perimeter of the field.

211. ## trig

sorry -- here it is simplify this expression : (x^3 y)/(y^(1/2) x^(-2) ) when x is not = 0, and y is not equal to 0 thank you

212. ## math

Please show me the steps on how to get the simplest form for 1 7/5ths

213. ## math

Thank you for your help :) "The piecewise function f(x)= n(x^3)-x______when____x(or=to)1 is differentiable everywhere. What is n? If you could explain step by step how to do this that would be great because I just do not see how to do this problem...thank

214. ## geometry

if the hypotenuse of a triangle equals 25 and the height is x, then what is the length of the base?

215. ## Computer Science 40

Please help me with this homework assignment. I tried everything and it still didn't work. The question is: Use three variables volume, radius, and height to write a program that can be use to calculate the volume of a cylinder. Formula: volume = radius x

216. ## math

Have to draw a parallelogram that is not a rectangle with a base of 6cm and a hieght of 4cm

217. ## Math

How do I find the limit as x approaches 4 from the right when f(x)= (4-x)/l4-xl ?

218. ## math

3 (g-3) = 6 find the value of g

219. ## Calculus

(3x-4)e^x2-6=0

220. ## English

Need help in starting my paper on where to start, websites to research from: •Prepare a 700- to 1,050-word paper examining the effect of legal, safety, and regulatory requirements on the human resource process as they relate to the following statement:

221. ## Spanish

Does The Prince and Princess live at la Zarzuela near Madrid?

222. ## Algebra 2

George is 5 times as old as Heather. In 4 years he will be 3 times as old how old are both of them?

223. ## math

what is the solution sets of the following a) 2x^-7x-5 b)5y^-16y+3 c)10x^+5y-6 d)10x^-13x+4 e)12y^-11y-5 f)10c^-21c+9 g)3m^+5m-2

224. ## Math

Jeremy is in Grade 8. He has a paper route and wants to save for his college education. He determines that he has \$100 per month to put into an account at 6%/a compounded monthly. How much will he have at the end of five years for his college education? n

225. ## algebraII

solve for x: 1)log(x-3)+log(x+4)-logx=log5

226. ## Math

can this be written using "i" ? (-1 + √(-11)) / (2) i know that √-1 becomes + or - i

227. ## english

Since I'm doing a research paper now and i'm not sure if I accidentally plagiarize the contents when i try to paraphrase in my own words, so does anyone know any safe website that has a tool for me to check my essay

228. ## Math

I need help with this problem. Jason's credit cards beginning unpaid balance for August is \$2,000. During the August billing cycle he made a payment of \$200 and used card to purchase \$50 worth of groceries. Credit card charges 24% annual percentage rate

229. ## Math-Algebra

Solve: 3x-2y=10 2x+3y=-2 Graph: Substitution: Elimination: Show Your work! (I can'tfigure out how to graph it and when i used substitution and elimination it came out with two different anwsers. I need help! and i need to be able to show my work!)

230. ## physics

if the greatest acceleration force which may be be applied to a vehicle is numerically equal to its weight, find a the least distance and b the least time, in which the vehicle travelling on a horizontal road can be brought to rest from an initial velocity

231. ## math

two card are chosen at random from a standard deck of cards with replacement. What is the probabilit of getting two aces

232. ## History

What advantage did the United Nations (World War 2) appear to have over the League of Nations (World War 1) ?

233. ## Geography

What country is St. Lo in?

Would it be better to pay off a \$1000 loan at 4% over 15 years or at 10% over five years ?

235. ## MATH HELP

A line with an undefined slope passes through the points (-2,1) and (p, q). Which of the following points could be (p, q)? A. (1,0) B. (0,1) C. (0,-2) D. (-2,0) Help Me, I do not know how to figure this out?????

236. ## English

So which way is correct? The teacher will speack about the homeless in Florida. Or The teacher will talk about the homeless in Florida.

237. ## trig

Ido not understand why the rt triangel was in ratio of 1:√3:2 in Sue's question where in triangle abc c isthert angle and sin a √3/2 - find csc b-please explain where the 1 comes from

238. ## Maths

x+2 2x-1 3 - 5 = 5 Note: x+2 is on top of 3 2x-1 is on top of 5 and they r like a fraction.

239. ## Math

How do you find the height of a triangle ?

240. ## Math

If a cube has one edge of 2m, what is the surface area of this cube?

25

242. ## physics

a hare can run 100m in 5 seconds what is its speed

243. ## Math

A cube is both a polyhedron and a prism. This isn't true right?

244. ## Math

Which integer is 6 greater than -5. So what i have to do here?

245. ## Social Studies

how did helen thomas feel about watergate? if u could also tell me where u found the answer that would help, thanks

246. ## Math

What is the circumference of a circle with a diameter of 10 m.

247. ## Math

What is the surface area of a right circular cylinder with base circle of radius of 5m and height of the cylinder 10m?

248. ## chemistry

If 8.00 kJ of heat are added to 200. g of water at 20.0 C, what is the final temperature of the water?

249. ## Algebra

If y=7^(x+5)write the equation for the inverse of y. It must be a y=equation.

250. ## math

Solve for x to the nearest hundreth for an algebraic solution. 2^(x-2)=54

251. ## English

Can you check how I rephrase the opening to the first chapter of Orwell's 1984? Thank you . 1) This extract is taken from G. Orwell’s 1984 and gives an insight into life (I need a synonym) in London, the capital of Oceania, a totalitarian state where the

252. ## physics

A passenger riding on a train moving over a bridge with a velocity of 55m/s, drops a pen out of the window. the pen lands in the river below 2.4 seconds later. A. find how high the window was above the water. B. how far forward did the pen move?

253. ## Math

Solve integration using u substitution of (x+1)sqrt(2-x)dx

254. ## calculus

Find the equation of the line l, given that f(x)=10^x and the point A is at x=logbase10(4).

255. ## Chemistry Lab

Description of the process from problem one: Please help me fill in the blanks :) The _______ makes a transition from a _______ energy orbital to a _______ energy orbital resulting in the_______ of a photon.

3L+2k = 45

257. ## Math

Rewrite as a single log: 4lnx-2lny+1/3lnw

258. ## English

I forgot to include these other sentences. Thank you for your help. 1) He tries to remember what London was like when he was a child. Actually, he cannot remember anything about his childhood, except “a series of bright-lit tableaux, occurring against no

259. ## Math

I am looking for help integrating using u substitution over the interval of 0 to pi/2 the function cos(2x/3)

260. ## chemistry

What is a typical speed for a N2 molecule in this room? a) 50 m/s b) 500m/s c) 1500 m/s

261. ## health care studies

micro perspective vs marco perspective which has the greatest influencce on a person health?

262. ## Math

If a sphere has radius 5 m. what is the volume of the sphere?

Compare the following objects in the our Solar System in terms of 1. Where they are located and 2. What they are composed of : Sun Terrestrial planets Jovian planets Asteroids Comets Meteroids

264. ## math

a bullet of mass m,with speed v,hits a fixed wooden block and penetrates a distance of l.find the average resistance of the wood.

265. ## algebra

provide me with a radical expression to simplify

266. ## math

A praire vole has an average of 9 babies per litter. if it has 17 litter in season about how many babies are produced?

267. ## Math

The circumference of a circle with radius r is πr2 Is this true?

268. ## Calculus

solve the following: 2^-x=3^2x+2

269. ## Spanish

Hoe do you say "I turn on the fan when its hot." is this correct: Yo arrancar la ventiladora fue su caliente.

270. ## math

-3(4b-10) = .5(-24b=60) find the value of b

271. ## Science

What are black holes ?

272. ## trig

is there a lowest or least cosine of a triangle with sides of 4,5,and 6? such as: .78, .72...

273. ## english

what does metaphor mean

274. ## English

I still have a few more sentences on the same theme. I really hope you can look at them too. 1)In any case, the face of Big Brother symbolizes the Party in its public manifestation; he is a reassurance to most people (the warmth of his name suggests his

275. ## biology

Jane is diabetic. How does this meal affect her condition and what interventions may be needed to return her body to homeostasis

276. ## Social Studies 20-1

Can someone explain to me what these sourses mean and how they relate to nationalism? (just so i have an idea of what i am going to write about) SOURCE 1 "the lines of red are blood, nobly and unselfish shed by men who loved the liberty of their fellowmen

277. ## Maths

is 10*10exponent -3 a scientific notation?

factor 7x+42

279. ## Math

(numeratorx^-4y^2/Denominator x^-2y^-4)-3

281. ## Math

What is the surface area of a right circular cylinder with base circle of radius of 5m and height of the cylinder 10m?

282. ## computer science

What is an assembly language

283. ## math

Give the slope and y-intercept for the line represented by y=3x/2

284. ## Algebra 2

Let f(x)=x^2+1 and g(x)=2x^2 find G(f(x))

285. ## Math/Trig

Find the area of triangleABC with B=47.6degrees, a=3.6, and c= 9.7. Round your answer to the nearest tenth.

286. ## Pre-Calculus

For what values of x is it true that |sin(x)-x| < 0.01?

287. ## English

If I say "Did Tom speak Italian" is this past tense?

288. ## Combinatorics

In how many ways can 8 students be assigned to 2 groups if each group must have at least 3 students?

289. ## Calculus

solve the following: 2^-x=3^2x+2

290. ## RATIOS MATH

x to 6, 20 to 24 find value of x that makes them equal

291. ## Social Studies

how has the internet changed video voyerism? noone answered when i posted it before

292. ## medical

how long will someone have to be in the hospital after they fainted?

293. ## Principles of Macroeconomics

What are the non-monetary benefits of growing tobacco, of working as a plumbers assistant, and of working as a carpenter during the spring and summer and storing travel trailers for a local campground and selling oysters during the fall and winter?

294. ## math

where can i find information about fractions decimals and percents

295. ## Calculus

(3x-4)e^x2-6=0

296. ## Math

I had to simplify the expression: -5exponent2(squared) I got the answer of 25 wrong. Why is that wrong?

297. ## English

I need a plausible solution to genocide.

298. ## math

4545456+15616

299. ## Math

A commercial airplane has a takeoff speed of about 300 km/h. What si the takeoff speed in mi/h?

300. ## alge2

simplify: (2±√x)/(2-√x)

301. ## Math

If a sphere has radius 5 m. what is the surface area of the sphere?

302. ## Maths

(3^-2e^4)^-1 [bracket three to the power of negative 2. 'e' to the power of 4, close bracket, to the power of negative 1]

303. ## math

a bullet of mass m,with speed v,hits a fixed wooden block and penetrates a distance of l.find the average resistance of the wood.

304. ## Math

(5x + 10)(5x - 5)

305. ## english

use yellow flower in a sentence

306. ## Calculus

solve the following: 2^-x=3^2x+2

307. ## Algebra II

I am stuck on a rational division problem: x is squared minus 1 0ver 1 divided by x-1 over x + 5 = I hope you can help, Cathy It has been five, stupied, hours now!

308. ## geometry

a square has a diagonal measurement of 8 radical 2 inches. calculate its perimeter.

(abc)^0

310. ## trig

(x^3 y)/(y^(1/2) x^(-2) )