# Questions Asked onNovember 27, 2012

33. ## algebra

A store manager bought c calculators for $8. All but four were sold for$10 each. The remaining four calculators were not sold. Find the store's profit, in simplified form, in term of c.

34. ## Math radicals

Radical 8 over 18 ? Plz reply fast

35. ## Radicals math

Write. Without the radical symbol : 1.) radical 400 2) Radical 16 over 49. 3). Radical 2 over 50.

36. ## Algebra 1B Chapter 10

I'm reclassified but I'm still a 10th grader and the only class I need to take is Algebra1B So here's the problem. I'm 1990, the town of Belgrade, Montana, had a popuof of 3422. For each of the next 8 years, the population increased by 4.9% per year. a.

37. ## Math

1)Radical 2 over 50 2) radical 10 to the power 3 all squared.

38. ## chemistry

Explain the effect of molecular polarity on behavoir

asked by Ismail basira
39. ## math

find the 6 trigonometric functions of tan (-3/8): sin < Ø

40. ## maths

if 59,51,76,3,6 were numbers as total and 84,88,35,62,18 were machine produce what will be the next 5 out come numbers.if we are selecting from 1 to 90.

41. ## maths

if cosx=-1/2,x lies in third quadrant, find sinx.

42. ## maths

Let A, B and C be the sets such that A ∪ B = A ∪ C and A ∩ B = A ∩ C. Show that B = C.

43. ## math help

A male black widow spider is half the size of a female black widow spider. Together, they are 21 millimeters in lenght. How big is a female black widow? A male?

44. ## Math

is radical -9*-4 = radical -9 * radical -4 ? Justify

45. ## Physics

A cubical object of sides 5 cm is immersed completely in water. What is the force of buoyancy on the object? (Assume g = 10 m/s2)

46. ## Physics

What is the frequency of a sound wave in air at 20°C that has a wavelength of 0.4 m?

47. ## Physics

An object is placed 11 cm in front of a convex mirror of focal length 4 cm. Using the lens equation, find where the image will form and state whether it is a real or virtual image.

48. ## elocution

theme united we stand divided we fall

49. ## Probability-plse

A committee of two persons is selected from two men and two women. Find the probability that the committee will have at least one man.

50. ## Physics

A man cycles up a hill whose slope is 1in20. If themass of the man and the cycle is 150kg and the man covers a distance of 100m along the incline, calculate the work done by theman.

51. ## math

how many terms are there on a 1/2 (a+b)? and are they monomial or binomial?

52. ## math

a ship sail S 40 degrees W four 4 hours how do i figure out this question

53. ## Math

What is radical 2/50 ?

54. ## Chemistry

Briefly explain what the consequense would be if excess 6M NaOH solution instead of ^m NH3 solution were used to separate Fe3+ and Al3+ ions from Ca2+, Cu2+,and K+ ions at pH 9-10.

55. ## Math Essentials

How many ways can an IRS auditor select 4 of 9 tax returns for an audit?

56. ## calculus

A machine on an assembly line fills cans with quantities of food that are normally distributed with a standard deviation of 0.057 pounds. The mean quantity filled is estimated using a sample of 100 cans. What is the difference between the upper and lower

57. ## algebra

what should be the equation of the line in standard form that passes through (4,6) and is parallel to the line where equation is y=2/3x +5?

58. ## calculus

What is the value of this expression when n approaches infinity? 4 −(4/n)+(5/n)+(15/3n^2) *its all one equation*

59. ## math

Maria ran 3 and 4/5 miles. She ran 1 and 2/3 miles further than Paul. Write the equation.

60. ## math

Can 0/3 + 3 be simplified? Can 10m + 1 / 10 be simplified?

61. ## statistics

How many ways can a person select 6 candy bars from a list of 10, and 6 snacks from a of 12?

62. ## Math

A recipe for cake calls for 5 and 1/4 cup of flour. The chef mistakenly adds 7 and 2/3 cups of flour to the mixture. How much flour does the chef need to remove from the mixture?

63. ## soc 305

In American society, those least likely to be living in poverty are ____________.

69. ## physics

An object has a force of 10 newtons from the right and 17 newtons from the left. Once the object starts moving toward the right, an additional force of 7 newtons is applied from the right. What can you conclude about the direction of motion of the object

70. ## physics

An object has a force of 10 newtons from the right and 17 newtons from the left. Once the object starts moving toward the right, an additional force of 7 newtons is applied from the right. What can you conclude about the direction of motion of the object

71. ## physics

An object has a force of 10 newtons from the right and 17 newtons from the left. Once the object starts moving toward the right, an additional force of 7 newtons is applied from the right. What can you conclude about the direction of motion of the object

72. ## physics

An object has a force of 10 newtons from the right and 17 newtons from the left. Once the object starts moving toward the right, an additional force of 7 newtons is applied from the right. What can you conclude about the direction of motion of the object

73. ## physics

An object has a force of 10 newtons from the right and 17 newtons from the left. Once the object starts moving toward the right, an additional force of 7 newtons is applied from the right. What can you conclude about the direction of motion of the object

74. ## calculus

A camera store sells 40 pairs of binoculars per week on average with a standard deviation of 6. What is the probability that the store will sell more than 52 pairs binoculars in any week? 8.28 3.57 7.24 2.28 4.55

75. ## English

Combine the sentences below into a brief paragraph,using clear and efficient language.Remember that each sentence contains some information that is essential to the meaning of the overall paragraph; do not omit any necessary details. When you have

76. ## English

Can you recommend so websites for an assignment I am doing on the ancient origins of Valentine's Day and how it was celebrated in ancient times and today?

77. ## physics

An astronaut throws a wrench in interstellar space. How much force is required to keep the wrench moving continuously with constant velocity? Select one of the options below as your answer: A. a force equal to its weight on Earth B. a force equal to zero

78. ## pre calculus

A bag contains 4 blue marbles, 2 black marbles, and 3 red marbles. If a marble is randomly drawn from the bag, what is probability that it is not black? 1/2 2/9 5/9 7/9 14/19

asked by king chris
79. ## Chemistry

A 25.0 g block of copper at 350.0 degrees celcius has 857J of heat added to it. What is the final temperature of the block of copper?

80. ## Chemistry

How much heat is required to raise the temperature of a 125g block of iron from 17.5 degrees celcius to 82.3 degrees celcius?

81. ## chem

Endothermic reaction equilibrium: BiCl3(aq) + H2O(g) = BiOCl(s) +2HCL(aq) + 2 HCl at a point at which the sollution is colorless and a small minute amoount of BiOCl(s) is observed. for the folowing questions 1to 5: a. state which way the reaction shift in

82. ## calculus

3 letters are chosen at random from the letters P, A, N, S, O, L. What is the size of the sample space of this experiment? 12 10 20 30 35

asked by king chris
83. ## Chemistry

How much heat is required to raise the temperature of a 35.0g block of aluminium from 125 degrees celcius to 322 degrees celcius?

84. ## Chemistry

7750 J of energy is added to a 325g stone at 24.0 degrees celcius. The temperature increases by 75.0 degrees celcius. What is the specific heat of the stone?

85. ## Chemistry

A 335g block of copper cools from 95.0 degrees celcius to 27.2 degrees celcius when it is put in a beaker containing water at 22.4 degrees celcius. What is the mass of the water in the beaker?

86. ## Chemistry

A 35.0 g block of copper at 350.0 degrees celcius is added to a beaker containing 525 g of water at 35.0 degrees celcius. What is the final temperature of water?

87. ## Geometry

Write a two column proof proving figure ABCD is a rhombus. Given - diagonal BC.

88. ## calculus

Robin randomly selects a number between 1 and 20. What is the probability that the number selected is the square of a natural number? 1/2 3/20 3/10 1/5 1/3

89. ## algebra

a five digit number that follows the pattern:if you put a 1 after it the number is three times as large as it would be if u had put a 1 before it

90. ## chemistry

a. Find the amount of solute based on this information Volume = 500 ml Concentration of solution= 15% (w/w) Solute (molar mass) = H2SO4 is 98.0g/mol b. Find the molar mass Amount of solute= 117.0g Volume of solution= 2.00L concentration of a solution= 1.0M

91. ## science

The major advantage provided by worms to a lawn is

92. ## calculus

Which is the sixth term in the expanded form of this binomial? 14(x)^3 280(x)^2 280(x)^3/2 672x 448x

93. ## chemistry

The organic compound di-n-butyl phthalate, C16H22O4(l), is sometimes used as a low-density (1.046 g·mL–1) manometer fluid. Compute the pressure (in torr) of a gas that supports a 585-mm column of di-n-butyl phthalate. The density of mercury is 13.53

94. ## art

How do I set out a timeline from Prehistoric art to Modern art in a power point presentation?

95. ## CALC

Find the coefficients of this binomial using Pascal’s triangle: (a + b)^8.

96. ## CALC

A biased coin whose chance of heads is 0.4 is tossed five times in a row. What is the probability that heads is tossed exactly 2 times? 20.2% 23.04% 36.8% 40.1% 45.6%

97. ## Physics

A vibrator in a ripple tank vibrates with a frequency of 3.0 Hz and an amplitude of 2.5 cm. The resulting waves travel away from the source with a speed of 2.5 cm/s, passing under various markers floating on the water. (a)In what direction(s) do the marker

asked by Raj Phys27/11
98. ## calculus

If Sn = 1 + 6 + 11 + 16 + 21 + 26...... where an = (5n − 4), what would be the mathematical expression represented by Sk + ak + 1?

99. ## calculus

What is the first natural number that causes the statement 1 + 3 + 5 +... + (2n − 1) 4n − 1 to fail? 2 3 4 5 6

100. ## pre calc

If Sn represents the sum of the squares of the first n natural numbers, use proof by induction to find which of the following expressions for Sn is true? Sn=n(n-1)/(3) Sn=n(2n-1)/(3) Sn=n(n+1)/(3) Sn=n(n+1)(2n+1)/(3)

101. ## Finance

Assume the economy consisted of three types of people. 50% are fad followers, 45% are passive investors who hold the market portfolio, and 5% are informed traders. The portfolio consisting of all the informed traders has a beta of 1.5 and an expected

102. ## algebra

Could someone please explain the steps in finding all the real zeroes y=(x-12)^3-7 I do not know how

103. ## algebra

Could someone please explain the steps in finding all the zeroes of the equation x^4-6x^2-7x-6=0 Have no idea

104. ## pre calc

What is the first natural number that causes the statement: (2 + 3)^n **less than equal to sign** 4^n + 3^n to fail? 1 2 3 4 5

105. ## CALCULUS

The masses of 10 books are found to be in an arithmetic sequence. If their total mass is 13 kg and the lightest book has a mass of 400 grams, what is the mass of the heaviest book? 2,000 grams 2,100 grams 2,200 grams 2,300 grams 2,700 grams

106. ## world history

Which of the following was not an innovation that came about due to militarization in the 1800s?

107. ## Poetry

2. Which of the following lines from the poem includes an example of alliteration? (1 point) Waiting, huddled close together Our food was gone. Our fuel was low. Amundsen had reached the Pole. We had come pursuing glory

108. ## calculus

A multistoried building has a floor area of 2,000 square feet on the ground floor, 1,995 square feet on the 1st floor, 1,990 square feet on the 2nd floor, and so on. If the areas of the higher floors follow this sequence, what is the expression to

109. ## physics

A 66 kg human sprinter can accelerate from rest to 11 m/s in 3.4s. During the same interval, a 35 kg greyhound can accelerate from rest to 20 m/s. Compute (a) the change in kinetic energy of the sprinter. (b) the change in kinetic energy of the greyhound.

110. ## algebra

f(x)=square root of 5-x and g(x)=x^2+2x a- find g(f(-1)) b-f(x)/g(x), state the domain, then evaluate for x=3

111. ## maths

kathleen spent 5/8 of her money and had 15e left how much had she at the start

112. ## structure and function of the human body

What is the importance of ATP? explain where carbohydrate metabolism occurs in the cell, what additonal ingredient is needed and what waste product is produced in this process?

113. ## math

two 6 sided dice are rolled . what is the probability the sum of the two numbers on the die will be 6

114. ## poetry

9. Rewrite the first stanza of “Scott’s Goodbye” as free verse. (5 points)

115. ## Physics

A point source is generating circular water waves. (a) What does the amplitude of the wave near the source depend on? (b) What happens to the amplitude of the wave as it spreads outward? (c) Why the amplitude of a wave changes as it spreads outwards?

116. ## college course

•unscramble letters for phrases - I / _ _ _ _ _ / _ _ _ _ / _ _ / / _ _ _ _ / a / _ _ _ _ _ / I / _ _ _ / but/ _ _ _ _/ _ _ _ _ _/ _ _ e_ _ / the / _ _ _ e_/. One sentence. this is what they have given me already and said I can use only these letters but

117. ## Statistics

I am so lost on this statistics question would someone help me figure out how to answer it? A random variable X is normally distributed with the mean and standard deviation 1.6. What is the proportion of the data values that lies within 1.6 standard

118. ## language arts

is chapter 5 in johnny tremain a major event.

119. ## math

Jerry invested $14,000 in a certificate of deposit at 5%. He also put$2,500 in a savings account at 3%. How much interest will he earn after one year?

120. ## physic

A force of 20 newtons is exerted on a chair from its right and a force of 12 newtons is applied from its left. What is the net force acting on the chair and in what direction will the chair tend to move?

121. ## math

Beth Pittman earns $12,558 per year. She is paid 52 times per year and claims 2 exemptions. If$8.85 in taxes is withheld from each paycheck, at what rate is she taxed?

122. ## physics

Air consists of molecules of several types, with an average molar mass of 28.95 g. An adult who inhales 0.6 L of air at sea level takes in about how many molecules? (The density of air is 1.229 kg/m^3, and the molar mass of air is 28.95 g/mol.)

123. ## physics

A scuba diver must decompress after a deep dive to allow excess nitrogen to exit safely from his bloodstream. The length of time required for decompression depends on the total change in pressure that the diver experienced. Find this total change in

124. ## Math

If X = 12 units, Y = 10 units, and Z = 14 units, then what is the surface area of the right triangular pyramid shown above?

125. ## math

Problem: how many bricks 3.75 in. Wide × 8 in. Long are required to cover a patio 13 ft. 6 in. Wide by 18 ft 9 in. LonStep 1. First, find the total width & length of the patio in inches. Step 1a. Convert the portion of width and length that is expressed

126. ## Social studies

what was the formal name for our country?

131. ## mattttthhhhhhh

Problem: how many bricks 3.75 in. Wide × 8 in. Long are required to cover a patio 13 ft. 6 in. Wide by 18 ft 9 in. LonStep 1. First, find the total width & length of the patio in inches. Step 1a. Convert the portion of width and length that is expressed

132. ## chemistry

0.2688 of a monoprotic acid neutralizes 16.4mL 0f 0.08133 M KOH. Calculate the molar mass of the acid in units of g/mol

133. ## Algebra 2 help please :)

What is a cubic polynomial function in standard form with zeros 1, –2, and 2? Use synthetic division to find P(3) for P(x) = x^4 – 6x^3 – 4x^2 – 6x – 2. Divide 3x^3 + 3x^2 + 2x – 2 by x + 3 using long division. Divide using synthetic division.

134. ## trigonometry

Find the magnitude of the resultant force and the angle between the resultant and each force: Forces of 2 lbs and 12 lbs at an angle of 60 degrees to each other.

135. ## trigonometry

A plane is headed due west with an air speed of 300 mph. The wind is from the north at 80 mph. Find the bearing for the course and the ground speed of the plane.

136. ## psych

1.11 (1 pts.) While Pete was out playing touch football with his friends, he tripped, fell, and bumped his head on the ground. Immediately afterward, he was very disoriented and kept asking his friends what time it was. Pete may have experienced A)

137. ## psych

1.21 (1 pts.) William is acutely retarded and requires intense care. His IQ has been measured at approximately 15. What term would be used to classify William's level of retardation? A) mild B) moderate C) severe D) profound # 1.22 (1 pts.) Shannon has

138. ## math

a system has a total mechanical energy of 350 J and kinetic energy of 220 J. what is its potential energy?

asked by takwazi whtison
139. ## Chemistry Lab

chemical equation for saponification of methyl salicylate in 6 M NaOH. C8H8O3 + NaOH ---> C7H6O3Na + CH3OH + H2O is this the right reaction? is saponification like hydrolysis? what is the hydrolysis of methyl salicylate in 6M HCL? C8H8O3 + HCl --->

140. ## chemistry

How would student make 500mL of .08500 M solution of iron using stock solution of .3180 M in iron(III)?

141. ## psych

21(1 pts.) Based on the incidence of Fetal Alcohol Syndrome in various ethnic groups, which of the following individuals would be considered high risk? A) a woman of French Canadian descent B) a woman of Irish descent C) a woman of Italian descent D) a

142. ## abnormal psych

# 1.44 (1 pts.) Dr. Green is an admitting psychologist at a psychiatric hospital. Unfortunately, every client she interviews receives the diagnosis of schizophrenia. Dr. Green's diagnostic system ignores A) reliability. B) variance. C) base rates. D)

143. ## English 4

How does nature in Wordsworth's poetry differ from nature in Byron's description of the Byronic hero?

144. ## physics

A car moving with a speed of 85 km/h is brought to rest in a didtance of 60 m. How much time did the car take to stop?

145. ## chem

Describe in detail by words how to prepare 200ml of .150M HCl from a 1.00 M HCl stock solution? Need help with this please? i used C1V1=C2V2 and got volume 2 = 33L or 0.33mL. to prepare the solution i need to weigh 1 gram of HCL (from 1.00M HCl stock

146. ## Chemistry

How to predict the possible structures of a compound if the degree of unsaturation of it is in fraction?

147. ## Math (MS112)

What rate of interest, to the nearest tenth of a percent, compounded quarterly is needed for an investment of $1700 to grow to$2600 in 12 years? I am given the formula A=P(1+r/n)^nt

148. ## physics

The largest grand piano in the world is really grand. Built in London, it has a mass of 1.25 × 103 kg. Suppose a pianist finishes playing this piano and pushes herself from the piano so that she rolls backwards with a speed of 1.4 m/s. Meanwhile, the

149. ## physics

The largest grand piano in the world is really grand. Built in London, it has a mass of 1.25 × 103 kg. Suppose a pianist finishes playing this piano and pushes herself from the piano so that she rolls backwards with a speed of 1.4 m/s. Meanwhile, the

150. ## physics

The largest grand piano in the world is really grand. Built in London, it has a mass of 1.25 × 103 kg. Suppose a pianist finishes playing this piano and pushes herself from the piano so that she rolls backwards with a speed of 1.4 m/s. Meanwhile, the

151. ## physics

a football player runs at 8 m/s and plows into a 80 kg referee standing on the field causing the referee to fly forward at 5 m/s. if this were a perfectly elastic collision, what would the mass of the football player be?

152. ## statistics

Find the t dcore you would use for an 95% confidence interval. 80 students,72 average, 4 standard deviation.

153. ## math

3500 in a savings account for 9 months at a interest of 4.5%. What is the total amount at the end of this time? Thanks.

154. ## physics

A box with a volume V = 0.03 m^3 lies at the bottom of a lake whose water has a density of 103 kg/m^3. (a) How much force is required to lift the box, if the mass of the box is 100 kg? (b) How much force is required to lift the box, if the mass of the box

155. ## chemistry

Your x-ray lab has a monochromator consisting of a single crystal of nickel cut so that the (001) plane lies in the cube face. At what angle (in degrees) should the cube face be tilted with respect to the incident beam in order to select radiation with a

156. ## physics

A tank of height H is filled with water and sits on the ground. Water squirts from a hole at a height y above the ground and has a range R. For two y values, 0 and H, R is zero. Determine the value of y for which the range will be a maximum. (Use any

157. ## physics

An open-topped tank completely filled with water has a release valve near its bottom. The valve is h = 1.9 m below the water surface. Water is released from the valve to power a turbine, which generates electricity. The area of the top of the tank, A_T, is

158. ## Genetics

starting with 1000 copies of a template, 35 cycles of PCR were performed. What is the theoretical yield of copies of double stranded product of this amplification reaction?

asked by Josh G.
159. ## chemistry

What is Boyle's Law constant if a sealed rigid container with a volume of 650 mL has a pressure of 131.1 kPa ?

160. ## Physics: Wave Motion

A vibrator in a ripple tank vibrates with a frequency of 3.0 Hz and an amplitude of 2.5 cm. The resulting waves travel away from the source with a speed of 2.5 cm/s, passing under various markers floating on the water. (a)In what direction(s) do the marker

asked by Raj Phys27/11
161. ## Physics

Why is it that if deceleration is doubled, distance is halved?

162. ## physics

A technician wishes to produce the lens +2.00DS/+2.00DC x90 in toric form, in CR39 with a -5.00 base curve. After finishing the toroidal surface with the CR39 tool it is discovered that, in error, they have used a plastics material of refractive index

asked by need help!
163. ## chemistry

An x-ray generator operated at a plate voltage of 7000 V is incapable of producing Ni Kα radiation. Calculate the minimum energy required for a ballistic electron to produce Ni Kα radiation. Express your answer in units of eV.

164. ## Statistic

In chi square goodness of fit test, if the expected frequencies, and the observed frequencies were quite different, we could conclude that: A) null hypothesis is false, and we would reject B) chi square distribution is invalid, and use t distribution

165. ## English

Please help me figure out what I got on my exams, am kind of worried!Please tell me if I am passing! Thank you! I got 113of 250 on my first exam. 113/250*100=.204304 is this right? Second exam: 120/250*100=.2304 is this right? Thank you!

166. ## College Chem 1

a chemistry handbook lists the solubility of NaI as 184 per 100mL of H2O at 25 degrees Celcius. 1) How many moles of NaI can be dissolved in 100mL of H2O at 25 degrees Celcius? 2) What would be the molarity of a saturated aqueous solution of NaI prepared

167. ## English.

I have researched Valentines day and its origins and how it was celebrated today and in ancient times. I am having a hard time starting my introduction. Can you help?

168. ## physics

A technician wishes to produce the lens +2.00DS/+2.00DC x90 in toric form, in CR39 with a -5.00 base curve. After finishing the toroidal surface with the CR39 tool it is discovered that, in error, they have used a plastics material of refractive index

asked by need help!
169. ## Multi-Step Equations

There are not any choices to these so I need help 1. x/4 + 1 = -5 2. 6x + 29 = 5 3. Combine like terms -21a + 16a

170. ## calculus

a random sample of 80 students at a large school shows an average grade of 72 in algebra with a standard deviation of 4. find the t-score you would use for an 95 % confidence interval

asked by emanuel hargrove
171. ## chemistry

Balance the following equations. Show all work. MnO4- + Zn -> Mn2+ + Zn2+

172. ## math

how many times less is 400 than 4 million; explain

173. ## chemistry

is water hard or soft if it contains 1.8 moles

174. ## Steve I have a question

I have 6 more questions do you mind helping me with them? Pretty Please! :(|)

175. ## physics

A technician wishes to produce the lens +2.00DS/+2.00DC x90 in toric form, in CR39 with a -5.00 base curve. After finishing the toroidal surface with the CR39 tool it is discovered that, in error, they have used a plastics material of refractive index

asked by Can anyone help?
176. ## physics

A technician wishes to produce the lens +2.00DS/+2.00DC x90 in toric form, in CR39 with a -5.00 base curve. After finishing the toroidal surface with the CR39 tool it is discovered that, in error, they have used a plastics material of refractive index

asked by Can anyone help?
177. ## physics

A technician wishes to produce the lens +2.00DS/+2.00DC x90 in toric form, in CR39 (n=1.498)with a -5.00 base curve. After finishing the toroidal surface with the CR39 tool it is discovered that, in error, they have used a plastics material of refractive

asked by Can anyone help?
178. ## Math

1. Samuel is 2/3 as old as his brother. In five years, he will be 3/4 as old as his brother will be. Find their present ages. a. If x = the brother’s age now, write an expression for Samuel’s present age in terms of x. b. Write an expression for the

179. ## Fundamentals of Early Childhood Education

Describe nine elements of daily structure recommended for early childhood program.

180. ## math

fiona invested $1000 at 6% compounded continuously. at the same time, maria invested$1100 at 6% compounded daily. how long will it take for their investments to be equal in value? step by step please!

181. ## math

fiona invested $1000 at 6% compounded continuously. at the same time, maria invested$1100 at 6% compounded daily. how long will it take for their investments to be equal in value? step by step please!

182. ## Physics

Two fraternities are in a tug of war. Theta Chi is pulling with a total force of 4,748 newtons to the east and Tau Kappa is pulling with a total force of 3,969 newtons to the west. What is the magnitude and direction of the resultant? Which team will win?

183. ## stats & prob.

Given the values of n=5, p= 0.15, and (1-p)=0.85, calculate the standard deviation of the data.

184. ## quantitative analysis

consider a manufacture whose total cost of producing x items is given by c(x) = 10000 + 5x+1/9x^2 a) what is the average cost function of A(x) = c(x)/x? b)how many items should the manufacturer produce in order to minimize average cost? c)what is the

185. ## precalculus

Solve the given equation. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to two decimal places where appropriate.) sin θ = root 2/2 and List six specific solutions.

186. ## Physics

A centrifuge rotor rotating at 11500 is shut off and is eventually brought uniformly to rest by a frictional torque of 1.52 . a.If the mass of the rotor is 6.07 and it can be approximated as a solid cylinder of radius 0.0750 , through how many revolutions

187. ## precalculus

Solve the given equation. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to two decimal places where appropriate.) tan θ = - root of 3/3

188. ## precalculus

Find all solutions of the given equation. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to two decimal places where appropriate.) tan^2 θ − 3 = 0

189. ## Nutrition

What is the portion size of a #8 scoop?

190. ## math

Find the effective rate corresponding to the given nominal rate. (Round your answer to the nearest hundredth of a percentage point.) (a) 7%/year, compounded daily % (b) 6%/year, compounded monthly %

191. ## math

Find the present value of $26997.18 due in 3 yr at an interest rate of 10%/year compounded continuously.$?

192. ## algebra 1

name the property that justifies the following 15=15

193. ## English

What would be an example of using one analogy and one idiom in a paragraph.

194. ## physics

What is the intensity in watts per meter squared of 85.0 db sound?

195. ## physics

What sound intensity level in dB is produced by earphones that create an intensity of 4.00¡¿10^-2 W/m^2?

196. ## physics

What is the sound intensity level in decibels of ultrasound of intensity 10^5 W/m2, used to pulverize tissue during surgery

197. ## physics

A technician wishes to produce the lens +2.00DS/+2.00DC x90 in toric form, in CR39(n=1.498)with a -5.00 base curve. After finishing the toroidal surface with the CR39 tool it is discovered that, in error, they have used a plastics material of refractive

asked by Can anyone help?
198. ## physics

What is the speed of sound in a medium where a 100-kHz frequency produces a 5.96-cm wavelength?

199. ## math

the little town arts center charges $21 adults,$14 seniors, and $6 for children under 12 for their live performances on sunday afternoon. This past sunday, the paid revenue was$9486 for 718 tickets sold. there were 44 more children than adults. How many

200. ## Math

Javon's class have 24 students.If 1/8 of them play the piano,how many of the student in his class play the piano?

201. ## Math

Javon's class have 24 students.If 1/8 of them play the piano,how many of the student in his class play the piano?

202. ## chemistry

describe the preparation of 100ml of 6.0M HCl from a concentrated solution that has a specific gravity of 1.18 and is 37% w/w HCl.

compare the following items from the past to the present.car stove telephone and washing machine

204. ## Physics

A warehouse employee used a cable to pull a 125 kg crate across the floor. the angle between the cable and the floor was 25°. The magnitude of the pulling force was 185 N. The coefficient of kinetic friction between the crate and the floor was 0.27.

205. ## Physics

A rocket of total mass 3100 is traveling in outer space with a velocity of 120 . To alter its course by 40.0, its rockets can be fired briefly in a direction perpendicular to its original motion.

206. ## Physics

A vibrator in a ripple tank vibrates with a frequency of 3.0 Hz and an amplitude of 2.5 cm. The resulting waves travel away from the source with a speed of 2.5 cm/s, passing under various markers floating on the water. (a)In what direction(s) do the marker

207. ## MATH

HOW MANY TIMES LESS IS 400 THAN 4 MILLION???

208. ## MATH 5TH GRADE

HOW MANY TIMES MORE IS 2000 THAN 20?

209. ## math

Find the present value of $26997.18 due in 3 yr at an interest rate of 10%/year compounded continuously.$?

210. ## math

Find the present value of $26997.18 due in 3 yr at an interest rate of 10%/year compounded continuously.$ ?

211. ## Science

Can you explain tectonic plates?

212. ## English

1. He is the oldest of the three. 2. he is the oldest of three. (Which one is right?)

213. ## math

what is 6 minus 2 and one half? please explain answer

214. ## chemisrty

What is ΔGo at 1000 oC for the following reaction? CaCO3 (s) CaO (s) + CO2 (g)

compare the following items from the past to the present.car stove telephone and washing machine

216. ## math

how do you divide 1.0 divided by 0.02

217. ## math

what dimensions would make a box that has a volume of 27? show how you came up with it?

218. ## chemistry

A 1.70 g sample of a certain metal reacts with acid to liberate 380 mL of hydrogen gas, when collected over water at 20 Celsius and over 720 torr. What is the equivalent mass of the metal?

219. ## Chemistry

Calculate the maximum mass of calcium metal that should be used in an equivalent mass determination, with a 100 ml gas measuring tube for collection. Assume 80 ml of hydrogen gas at standard conditions for the purposes of calculation.

220. ## Geometry

Isosceles triangle base is 7 more than one-half times the legs. Perimeter is 22 centimeter Find length of each leg b

221. ## Physics

Suppose there is a small hole (radius=0.0203) at the base of a large tank. If the height of water in the tank is 15m (a) what is the speed of water escaping through the hole? (b) Calculate the amount of water (in cubic meters per second) escaping the tank.

222. ## Physics

An object (m=2.85 kg) is attached to a disk-shaped pulley. The diameter of the pulley is 0.242 and its weight is 7.272 N. Suppose the object is allowed to fall (a) What is its linear acceleration? (b) What is the angular acceleration of the pulley? (c) How

223. ## stats

what is the distinction between repeated measurements and matched items?

224. ## Physics

Two banked curves on a highway have the same radius. Curve A is banked at 13 degrees and highway B is banked at 19 degrees. A car can travel around curve A without relying on friction at a speed of 18 m/s. At what speed can this car travel around curve B

225. ## Physics

A toy is attached to the cieling by a string. As the toy flies around in a horizontal circle with a radius 45 cm, the string makes an angle of 60 degrees with the cieling. What is the speed of the toy?

226. ## Physics

A man lies on a plank of negligible mass supported by two scales 2.50 m apart. His head rests on the left scale which is also the axis of rotation. If the left scale reads 290 N and the right scale reads 122 N calculate his mass.

227. ## Physics

Find an expression in terms of M, mu, and theta for the speed of waves on the string.Express your answer in terms of the variables M, mu, theta, and appropriate constants. The picture shown is just of a block with mass m on an inclined frictionless surface

228. ## math VERY URGENT+IMPORTANT

what is 6 minus 2 and one half? please explain answer

229. ## ELA

I need a few suggestions of store names. Its a grocery store in Manhattan. Thx

8x^2-18x-5

231. ## Geometry

Isosceles triangle base is 7 more than one-half times the legs. Perimeter is 22 centimeter Find length of each leg

232. ## history urgent please!

The most dominant merchant and traders of the Indian Ocean Trade network were Chinese merchants Muslim and Arab merchants African merchants Australian and Oceania merchants European Merchants

233. ## math

the temperature on a cold december morning fell from 37 degrees to -4 degrees. how many degrees did the temperature fall? Please explain answer

234. ## science

what happens to a liquid when it releases enough energy?

235. ## Math

What is 23 times 17 in arrays and algorithm

236. ## Science

What fraction of the thickness of the thickest continental crust is the thickness of the oceanic crust? Give your answer as a reduced fraction.

237. ## Algebra 2

Energy Use Light Output 35 2250 50 4000 70 5800 100 9500 150 16000 What is the quadratic model for the light output with respect to use energy use? I don't understand this at all Please help ):

238. ## science

The force that every mass exerts on every other mass is called _________. A. gravity B. pull C. matter D. weight

239. ## Math

x = 3, 10, 5, 8, _, 12, _ y = 7, 10, _, _, 5, _, _

240. ## Math

x = 3, 10, 5, 8, _, 12, _ y = 7, 21, _, _, 5, _, _

241. ## 5 th grade math

what is the volume of a rectangular prism with a length of 4 inches, a width of 4 inches and a height of 2 inches?

242. ## math

The cost "C" of operating a concrete-cutting machine is related to the number of minutes "n" the machine is run by the function: C(n)=2.2n⋀2-66n+655. For what number of minutes is the cost of running the machine a minimum? What is the minimum cost?

243. ## Physics

A person jumps from a tower 5 m high. When he strikes the ground below, he bends his knees so that his torso decelerates over an approximate distance of 0.70m. If the mass of his torso (excluding legs) is 50kg, find the force exerted on his torso by his

244. ## math

lynda cut 3.2 meters of ribbon into equal size pieces. each piece was longer than 0.1 meter, but shorter than 2.o meters, with lengths in increments of 0.02 meters. How many pieces did lynda cut,and how long was each piece?

245. ## WOODVILLE ELEMETARY SCHOOL

I NEED HELP AT MATH CAN YOU HELP ME PLEASE...

i need help

247. ## math

what is the mean of 33,36,39,45,29,58

248. ## Physics

A vibrator in a ripple tank vibrates with a frequency of 3.0 Hz and an amplitude of 2.5 cm. The resulting waves travel away from the source with a speed of 2.5 cm/s, passing under various markers floating on the water. (a)In what direction(s) do the marker

249. ## Geometry:(

The surface of a rectangular prism is the sum of: the product of twice the length L and the width w the product of twice the length and the height h and the product of twice the width and the height. **** Write an expression that represents the surface

269. ## math

A bowl of fruit contains 4 apples, 5 oranges, and 3 bananas. In how many ways can 3 oranges be selected?

270. ## Physics

A car is traveling at 10 m/s. By what factor does the car's kinetic energy increase if its speed is doubled to 20 m/s?

271. ## English

Write the word that should be followed with a comma We hiked across town, through the woods and into the cave. woods? Tiffany, Christina and Paige are down the hall in Room 101 Christina? Do you want to go to the park, to the beach or to the parade? beach?

272. ## Chemistry

Suppose I put 1 billion bacteria in a 10 ml tube of saline, mix well, and label this tube A. Answer the following questions: 1. Take 1 ml from tube A and put it in an empty tube B. What is the concentration and number of bacteria in tube B?

273. ## Physics

Part A: A cardinal (Richmondena cardinalis) of mass 4.50×10^−2 kg and a baseball of mass 0.142 kg have the same kinetic energy. What is the ratio of the cardinal's magnitude p(c) of momentum to the magnitude p(b) of the baseball's momentum? Part B: A

274. ## English

Reach each sentence if it is correct write c. if it has an error in commas, put the word in () that should be followed by a comma and add the comma The cafeteria is serving chicken soup vegetable stew, or chilli. chicken soup in () and a comma after soup

275. ## Chemistry

Suppose I put 1 billion bacteria in a 10 ml tube of saline, mix well, and label this tube A. Answer the following questions: 1. Take 1 ml from tube A and put it in an empty tube B. What is the concentration and number of bacteria in tube B?

276. ## Maths

Given the quadratic function y =3x^2+10x-8 (i)Find the y-intercept. (ii)Find the x-intercept. (iii) Calculate the axis of symmetry. (iv)Find the coordinates of the vertex (v)Sketch the graph of the above function.

277. ## English

Baking is a major project for the holidays. Is the verbal baking? Is this a gerund or a participle and why? Baking in the oven, the bread smelled delicious. Is the verbal baking in the oven? Is this a gerund or a participle and why?

278. ## physics

A cylindrical ﬁshing reel has a mass of 0.899 kg and a radius of 5.21 cm. A friction clutch in the reel exerts a restraining torque of 1.43 N · m if a ﬁsh pulls on the line. The ﬁsherman gets a bite, and the reel begins to spin with an angular

279. ## English

Read each sentence. Identify the comma error and put Add or Omit on the line to show how to correct the sentence. Then put the word in () before the error That shiny sleek car is new shiny add Courtney brought a delicious ham turkey, and beef sandwiches

280. ## math

Estimate each quotient 535.6/35?

281. ## Algebra

please help! Noah knows that his friend Ryan uses 2 small chlorine tablets each week to maintain his 10,000 gallon pool: 1)Write a direct variation equation that relates c and g, where c is the number of chlorine talets and g is pool volume in gallons.

299. ## Maths

State the x-intercepts of the graph of y=1-x^2

300. ## math

(76-12)-(48divided by 8)2

301. ## Chem 2

Describe how to make 175mL of a .10M tin(II) chloride solution??

302. ## Math

name the property and explain 26×(2×8)=(26×2)×8

303. ## Math

if the lateral surface area of a regular square pyramid is 200 inches square how do I find the volume?

304. ## Math: algebra 1

3. Which method would be the simplest way to solve the system? y =1/2 x 2x + 3y = 28 A.) graphing B.) substitution C.) elimination D.) distributive I think it is B.

305. ## Physics

A satellite in an elliptical orbit has a speed of 9.00km/s when it is at its closes approach to the Earth(perigee). The satellite is 7.00x10^6 m from the center of the Earth at this time. When the satellite is at its greatest distance from the center of

306. ## Algebra

Joyce combines 9 atoms of hydrogen and 3 atoms of nitrogen to make 3 molecules of ammonia. write a direct variation equation which relates atoms of hydrogen to atoms of nitrogen. How many nitrogen atoms does Joyce need to form ammonia molecules using 51

307. ## Math: Algebra

1. Which method would be the simplest way to solve the system? 7x + 5y = 19 –7x – 2y = –16 A.) graphing B.) substitution C.) elimination D.) distributive I think it is C.

308. ## College Physics

Suppose a planet is discovered that has the same total mass as the Earth, but half its radius. Calculate the acceleration due to gravity on the surface of this planet.

309. ## Math: algebra 1

6. In which quadrant does the solution of the system fall? y = x – 1 y = –3x – 5 A.) I B.) II C.) III D.) IV I think it is c.

310. ## English

Please help i need to put this sentences in order and combine them in order to make sense. 1. The pizza sits on the table. 2. It is fresh from the oven. 3. It is in the middle of the table. 4. Its crust rises up. 5. The crust is thick. 6. The crust is

311. ## Math: Algebra 1

2. What is the solution of the system? 7x + 5y = 19 –7x – 2y = –16 A.) (2, 1) B.) (1, 2) C.) (7, 5) D.) (–7, –2) I think it is A.

312. ## 7 grade math

a helicopter blade spend 775 times in 3 mintues find the rate in revolutions per second

313. ## math

hi, i don't understand the homework that says show how to make one adden a ten. example: 38+26= Thanks

314. ## English

Read the sentence. Rewrite each sentence adding the comma needed after the introductory word, phrase, or clause. Besides I don't like your idea for the project. Besides, I don't like your idea for the project. Throughout the class I kept sneezing

315. ## english

Is upset an action verb? Is were an conditional verb?

316. ## English

Is planned a condition or action verb? Is shower a condition or action verb? Is wears a condition or action verb?

If two numbers are written in scientific notation. how can you tell which number is greater? Where on a number line does the value of a positive number in scientific notation with a negative exponent lie?

asked by Maryam :)
318. ## Math

If the ratio of girls to boys on the track team is 5 to 6 which of these shows possible numbers of girls to boys on the track team? A.24 girls 20 boys B.50girls 56 boys C.60 girls 50 boys D. 20 girls 24 boys D?

319. ## science

If you toss a coin five times and it lands heads up each time, can you expect the coin to land heads up on the sixth toss? Explain. Please help! Thanks!

320. ## Grammar

The colon is a frequently used mark of punctuation that is used in a large variety of cases. A) True B) False I answered A

321. ## science

Mendel realized that the principles of probability could be used to _______ the results of genetic crosses. What's the blank? please help! thanks a bunch!

322. ## 7th grade art Ms. Sue please

1. This term refers to a subject in artwork that has been simplified and rearranged. (1 point) nonobjective linear semi-abstract objective 2. This term refers to artwork that does not have a reference to a subject or object. (1 point) representational

323. ## math

How do I convert 5sq.yd. to sq.ft.

asked by Math Geek
324. ## science

In cattle, red hair and white hair are codominant. Cattle with both white hair and red hair are what? please help! thanks!

325. ## science

What is the alleles of pea pot parents and the possible allele combinations of the offspring. Both parents are tall and 3 offsprings are tall while the other one is short. I don't get this! Please help! Thanks!!

326. ## math

pedro swam some laps in the pool and then swam 2 more.... algebraic expression

327. ## Algebra 2

Suppose you invest \$500 at an annual interest rate of 8.2% compounded continuously. How much will you have in the account after 15 years?

328. ## Algebra II

Write an equation for a parabola that opens upward from its vertex at (-4,3). What is the equation of its line of symmetry?

329. ## chemistry

how would you prepare 250 mL of a .1 M C12H22O11 starting with 2.5M C12H22O11

330. ## Math (5th grade )

Kathy's mom has made a batch of lemon bars. Her treats are in a rectangular pan that measures 12" x 8". She will cut a vertical and horizontal live every 2 inches along the length and width of the pan. How many bars will each person receive

331. ## Math

Subtract 5 from 8. Then multiply by c. Which of the. Following expressions matches the statement above? A.(8-5) x c B.(5-8) x c

332. ## Math

If the ratio of children to parents is 3 to 2 which of these shows possible numbers of children to parents? A.60 children 90 parents B.169 children 112 parents C.112 children 169 parents D.170 children 115 parents B? There are 2 men teachers to every 5

333. ## Science 8R - help

How does the Law of conservation of energy compared to the conservation of matter? please help

334. ## math

yancey collects plastic banks. He has three different banks: a pig,a cow and a horse. How many ways can Yancey arrange his banks on a shelf?

335. ## Math

A spinner is divided into 8 equal sections, Each section is either blue or yellow. THe spinner was spun 40 times. It landed on a yellow section 10 times. Which proportion can be used to find the number of sections Y, that could be expected to be yellow? A.

336. ## Grammar

When transcribing ratios numerically, you use a _____ to replace the word “to.” A) colon B) comma C) period D) semicolon I answered D

337. ## Math

Divide18 by g. Then, subtract 7. C. 18/g-7 Is this right?

338. ## Chemistry

3C3H8 + 20H2CrO4-> 9CO2 + 10Cr2O3 + 32H2O Suppose you want to make 1.50 g of chromium (III) oxide, how many ml of 6.25M chromic acid will you need to use if the percent yield of the reaction is 68.6%?

339. ## English 8R - help!!!!! (Project)

Create a power point presentation that illustrates words that pertain to the rural environment. - Select a letter from the alphabet - Make a list of 10-15 words or terms that begin with that letter - Create power point that defines each word - Provide

340. ## AP Chemistry

iron has a density of 7.86 g/cm3 and crystallizes a body centered cubic lattice. Show that only 68% of a body centered lattice is actually occupied by atoms, and determine the atomic radius of iron

341. ## science

what is the alelles of a tall plant.

342. ## science

what is the alelles for 3 tall plants and 1 short plant that are offsprings and have both tall parent plants?

343. ## math

What's the inequality ? the crowd that heard the President speak was estimated to be 10000 people.The actual crowd could be 750 people more or less than this. what are the possible values for the actual crowd size?

344. ## algebra

A submarine is 700 meters below the surface of the ocean. it is ascending at a rate of 35 meters every minute. What does x represent and What y represent

345. ## coding

This 35 years old female patient has carcinoma of the upper-outer left breast. She had a lumpectomy performed and a sentinel lymph node biopsy of the axillary lymph node. The pathology report for the lymph node. Diagnosis code with POA: I do not how to

346. ## physics

After being struck by a bowling ball, a 1.4kg bowling pin sliding to the right at 4.5 m/s collides head-on with another 1.4 kg bowling pin initially at rest. Find the final velocity of the second pin in the following situations: a)The first pin moves to

347. ## PreCalculus - Find Inverse

Find the inverse of f(x) = x^3, algebraically .

348. ## Math

Three out of every 45 tickets sold in a food bank raffle will win a prize. if Eli and his friends bought 15 tickets, which proportion can be used to predict w, the number of prizes they would expect to win? A.3/45=15/w B.3/w=15/45 C.3/45=w/15 D.w/15=45/3

349. ## College Physics

A satellite in an elliptical orbit has a speed of 9.00km/s when it is at its closes approach to the Earth(perigee). The satellite is 7.00x10^6 m from the center of the Earth at this time. When the satellite is at its greatest distance from the center of

350. ## Geometry

Given: and mEGFÚ=60 mAGFÚ=‹90; Prove: mAGBÚ=‹30.

asked by Megan DiOrio
351. ## english

hi ive been reading a book called, the berlin boxing club, and one of my hw assignments say i need to find 10 quotes in the book and im having trouble finding them. can u please help me? :)

352. ## Math

Add d and 7 then divide by 3

353. ## To Ms. Sue or any other teachers on Jiskha

Can some one please help with with my science post because I'm struggling.

354. ## Physics

three rotating, uniform disks that are coupled by belts. One belt runs around the rims of disks A and C. Another belt runs around a central hub on disk A and the rim of disk B. The belts move smoothly without slippage on the rims and hub. Disk A has radius

355. ## geometry

Write a flowchart proof. Given:

asked by sherianna johnson
356. ## geometry

A rectangle has a perimeter of 114m and an area of 807m^2. What are the dimensions?

357. ## Algebra

a helicopter that is 200 meters above the ground descends at a rate of 2 meters per second. The altitude of the helicopter after t seconds is given by h(t)=2000-2t. 1)give the range of this function 2)give the domain of this function.

358. ## spelling

i cant understand v/cv and vc/v patter mean .can you giv me exemple

359. ## math

Find equation of the line that passes through the points (2/3,-5/4) and (-3,-5/6). write your answer in slope-intercept form and standard form with integer coefficients.

360. ## chemistry

a saturated solution of barium chloride at 30 degrees Celsius contains 150 g water. how much addition barium chloride ca be dissolved by heating this solution to 60 degrees celsius? bacl2 at 30 degrees= 38.2 bacl2 at 60 degrees= 46.6

361. ## math

Yuki's age is four years more than one-fourth of Xena's age. Xena's age is 21 years and 6 months more than seven-eighths of Yuki's age. How old are Xena and Yuki?

362. ## chemistry

calculate number of dichlorine molecules in a 5.00ml container at 40 degrees Celsius and a pressure of 2.14 x 10^4 Pa.

363. ## Grammar

A compound modifier acts as a _____ unit modifying a noun. A) compound B) coordinate C) plural D) single I answered D

364. ## chemistry

how do i find the grams of potassium chloride per 100g of water in the saturated solution

365. ## algebra1

M5P3*(2M-6Q-5)-1 qm0

366. ## Ph CHEM

A solution is found to contain 1 x 10-4 OH− ions, determine the pH of this solution. I did this problem and got 4 but it is not going in as correct. -log(1*10^-4)=4

367. ## Chemistry

Objectives To determine the molecular weight of a volatile liquid. Discussion [This laboratory exercise was adapted from one in Beran and Brady's Laboratory Manual for General Chemistry , John Wiley & Sons, 1982] The Dumas Method for determining the

368. ## Grammar

A compound modifier is hyphenated when it comes directly after the noun it modifies. A) True B) False I answered B

369. ## English

1. He is the oldest of the three. 2. he is the oldest of three. (Which one is right?) •English - Ms. Sue, Tuesday, November 27, 2012 at 5:15pm They are both correct. •English - kaitlin:), Tuesday, November 27, 2012 at 6:26pm number 1 is correct because

370. ## math

a farmer had 24 animals. some of the animals were chicken and some were dogs. altogether there were 56 legs. How many of the farmer's animals were chickens and how many were dogs?

371. ## math

j has a bag of 23 pieces of fruit the bag has 10 banana chips. what is the probability that j will choose a banana chip when he reaches into the bag? how to solve this problem

372. ## stats

The Ledd Pipe Company has received a large shipment of pipes, and a quality control inspector wishes to estimate the average diameter of these pipes. A random sample of 18 pipes produces an average diameter of 2.56 mm with a standard deviation of 0.05 mm.

373. ## Exceptional Child

James wants a new toy. He says, "James toy". He is using: A. short sentences B. telegraphic speech. C. baby talk. D. holophrastic speech.

374. ## Math

Jeremy drinks 2 pints of milk every 3 days How much milk would Jeremey drink in 60 days? A.20qt B.25qt C.30qt D.40qt D? The chart below shows the survey results for 50 students and their candy preferences There are 250 students at the Valentines Dance.

375. ## calculus

An open box is to be constructed by cutting corners out of a 9in by 12in sheet of cardboard and folding up the sides. Find the dimensions which will maximize volume.

376. ## calculus

Find the point (x,y) on the curve y=sqrt(x+4) closest to the origin.

377. ## Math

If you get a confidence interval of (42,58) what is your margin of error?

378. ## Physics

A figure shows a section of a long tube that narrows near its open end to a diameter of 1.0 mm. Water at 20 degrees celsius flows out of the open end at 0.020 L/s. What is the gauge pressure at point P, where the diameter is 4.0 mm?

379. ## Physics

A string is wound around a solid cylindrical spool of mass 9.7 kg and radius 0.1 m and is tied to the ceiling. If the spool is released from rest and rolls on the string, and the distance to the ﬂoor is 6.14 m, how long will it take the spool to hit the

380. ## English

Do anyone read the story "the road" or watch the movie? i have some questions.

find the f and g, so that fOg= H H(x)=sqrt x^2+17 please show work

382. ## physics

A 160kg horizontal beam is supported at each end. A 330kg piano rests a quarter of the way from one end. What is the vertical force on each of the supports?

383. ## chemistry

Into a 1.00 liter flask are placed 0.820 moles of NO and 0.223 moles of N2 and O2. What are the concentrations of NO, N2, and O2 at equilibrium? For the molarity for each, I got this: NO= .027 M N2= .0079 M O2= .0069 M balanced equation: 2NO(g) N2(g) + O2

384. ## chemistry

intermolecular forces in caffeine

385. ## Physics

A basketball of mass 0.70 kg is dropped from rest from a height of 1.22 m. It rebounds to a height of 0.64 m. How much mechanical energy was lost during the collision with the floor? A basketball player dribbles the ball from a height of 1.22 m by exerting

386. ## Algebra 1

What is 5x cubed over x squared multiplied by 3x to the fourth power over 6x?

387. ## math

Find the rule for each function table m n 15 12 10 8 5 4 0 0

388. ## Grammar

A compound modifier acts as a _____ unit modifying a noun. A) compound B) coordinate C) plural D) single I answered D

389. ## PreAlgebra

Volume of a cube with side length of 26.4 meters I need this by 11/21/12 ASAP

390. ## Finance

5.3 The manager of a large computer network has developed the following probability distribution of the number of interruptions per day: Interruptions (X) P1X2 0 0.32 1 0.35 2 0.18 3 0.08 4 0.04 5 0.02 6 0.01 a. Compute the expected number of interruptions

391. ## Grammar

A compound modifier is hyphenated when it comes directly after the noun it modifies. A) True B) False I answered B

392. ## ENGLISH

hi ive been reading a book called, the berlin boxing club, and one of my hw assignments say i need to find 10 quotes in the book and im having trouble finding them. can u please help me? :)

393. ## calculus

Find the point (x,y) on the curve y=sqrt(x+4) closest to the origin.

394. ## Grammar

If the word “very” or an adverb that ends in “ly” is part of your compound modifier, you do not use a hyphen in the compound modifier. A) True B) False I answered A:)

change the exponential expression to an equivalent expression involving a logarithm. 1.9=a^6 a=1.1129 is this the correct logarithmic expression???

396. ## English

I want to put these words in a sentence that makes sense. Many will think that my voice doesn't matter for people my age. It doesn't sound right to me.

397. ## Grammar

Select the correctly punctuated sentence: A) He will follow up in 2 weeks. B) He will followup in 2 weeks. C) He will follow-up in 2 weeks. Answer A

398. ## Grammar

“Follow up” is never a verb. A) True B) False I answered F

399. ## math

what is the equivalent of 1/5?

400. ## Math

You decide to make a scale drawing of your bedroom. YOur bedroom measures 12 ft. wide by 20 ft. long. If you are using an 8.5" x 11" paper, whate scale will you use. Explain.

401. ## U.S history

what are the 5 states admitted next to the U.S.after 1849 ? please help .

402. ## physics

A baseball is thrown such that it is in the air for 4 seconds and lands 100 m away. Find the initial vertical and horizontal components of the baseball's velocity.

403. ## physics

An arrow is shot at an angle such that it's horizontal velocity is 40 m/s and it's vertical velocity is 20 m/s. Find the horizontal distance the arrow will travel before hitting the ground.

404. ## math pls help Ms Sue

Find the rule for the function table m n 15 12 10 8 5 4 0 0

405. ## math

Only 40% of people between the ages of 18 and 24 read a daily newspaper. Write the percent as a fraction in simplest form.

406. ## College Physics

A satellite in an elliptical orbit has a speed of 9.00km/s when it is at its closes approach to the Earth(perigee). The satellite is 7.00x10^6 m from the center of the Earth at this time. When the satellite is at its greatest distance from the center of

407. ## math

Yuki's age is four years more than one-fourth of Xena's age. Xena's age is 21 years and 6 months more than seven-eighths of Yuki's age. How old are Xena and Yuki?

408. ## Physics

A student sits on a rotating stool holding two 3.4-kg objects. When his arms are extended horizontally, the objects are 1.0 m from the axis of rotation and he rotates with an angular speed of 0.75 rad/s. The moment of inertia of the student plus stool is

409. ## math

Find equation of the line that passes through the points (2/3,-5/4) and (-3,-5/6). write your answer in slope-intercept form and standard form with integer coefficients.

solve the following logarithmic equation 2log2(lower than g)^(x-2)+log2^2=3 x=?

411. ## calculus

What is the exact value of sin(2 theta) if cos (theta)=3/5 and (theta) is in quadrent 4? 12/25 24/25 -12/25 -7/25 -24/25

412. ## CHEMISTRY

The half-cell, Tl | Tl+(1 mol L-1), is connected to a Pt | H+ | H2(1 atm) half-cell in which the concentration of H+ is unknown. The measured cell voltage is 0.0841 V and the Pt | H2 | H+ half-cell is the cathode. Standard reduction potentials are given on

413. ## CHEMISTRY

Ethylamine, CH3CH2NH2, is an organic base with pKb = 3.367 at 298 K. In an experiment, a 40.0 mL sample of 0.105 mol L-1 CH3CH2NH2 (aq) is titrated with 0.150 mol L-1 HI(aq) solution at 298 K. (a) Write a balanced chemical equation for the neutralization

414. ## math

aubrey can walk 4 1/2 miles in 1 1/2 hours. find her average aspeed in miles per hour.

415. ## CHEMISTRY

Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br− and C9H7N is quinoline, an organic base with pKb = 6.24 at 298 K. If you like, you may

416. ## calculus

Simplify the expression: tan(-x)csc(x)

417. ## trig

If tan y = -4/3 and y is in Q I'VE find cos 2y

418. ## college algebra

solve the following exponential equation. 7^x=8 a. x= Write in exact solution b. then with that answer move the decimal 3 points over

419. ## Chemistry

What is the mass of a sample of material that has a volume of 51.1 cm3 and a density of 6.31 g/cm3?

420. ## statistics

3. A researcher is interested in comparing the Christian maturity level of students who volunteer for community service versus those who do not. The researcher assumes that those who perform community service will have higher Christian maturity scores. The

421. ## Geology

What observable characteristic is present with banding of metamorphic rocks that is not present in the layering of clastic sedimentary rocks?

422. ## Calculus

Find the equation of the curve passing through P (1,2) whose slope is the square root of the product of the coordinates of any point on the curve.

423. ## Geology

Which of the three rock families occurs most in new York state?

424. ## Math (trigonometry)

How do you solve this trig identity problem without factoring? I just used @ to represent theta: sin^4@ + 2sin^2@cos^2@ + cos^4@ = 1

425. ## trig

If tan y = -4/3 and y is in Q I'VE find cos 2y

426. ## Physics

The velocity of the baseball as it leaves the bat is 38.2 m/s. Determine (a) the maximum height the baseball reaches, and (b) the total timke the baseball is in the air. Assume the baseball is caught at the same height above the ground as it was hit.

427. ## probability

two fair six-sided dice are rolled and the sum of the dots on the top faces is recorded. a) complete the table, showing the number of ways each sum can occur sum: 1 2 3 4 5 6 7 8 9 10 11 12 ways:1 2 3 b)use the table to find the probability of the

428. ## Physics

How do you determine the displacement of a graph with lots of areas of displacement, do you add them all together?

429. ## Physics

How do you determine the displacement of a graph with lots of areas of displacement, do you add them all together?

430. ## Trigonometry

How do you solve this trig identity? Using @ as theta: Sin@-1/sin@+1 = -cos@/(sin@+1)^2 I've tried it multiple times but I can't seem to arrive at the answer.

431. ## college algebra

use the properties of logarithms to find the exact value of the expression loglower 3^18 - log lower3^6 **how do I make the three lower in the log equation?

432. ## calculus

Which expression is equivalent to (sin x + 1)(sin x − 1)?

433. ## math

Write the expression thrice the sum of m and 8

434. ## Physics

A 4.0 kg wheel of 20 cm radius of gyration is rotating at 360 rpm. The retarding frictional torque is .12 N.m. Compute the time it will take the wheel to coast to a rest.

435. ## Psychology

I need to do a presentation on gender development. We're supposed to have an activity that presents the topic or ties into the topic. I have searched the internet, but have not come up with anything for gender development specifically. Does anyone have any

436. ## Math :):):):):):):):):):):):):)

Sarsh is currently at 83.7% in math. She has just finished a worksheet that is out of 30. She got 30/30 which is full marks. What percent is she at now in math?

437. ## Physics

A 4.0 kg wheel of 20 cm radius of gyration is rotating at 360 rpm. The retarding frictional torque is .12 N.m. Compute the time it will take the wheel to coast to a rest.

438. ## Algebra

The perimeter of rectangle is 62 m. If the width were doubled and lenght were increased by 9 m, the perimeter would be 104m. What are the lenth and width of a rectangle?

439. ## social studies

Greenland and new guienea are two islands with the largest land areas in the world. To which hemipshers do they belong

440. ## calc

Convert theta= 225° to rectangular form.