# Questions Asked onDecember 12, 2010

1. ## statistics

The red face cards and the black cards numbered 2-9 are put into a bag. Four cards are drawn at random without replacement. Find the following probabilities: a) All 4 cards are red b) 2 cards are red and two cards are black c) At least one of the red cards

2. ## Physics

A meter stick balances horizontally on a knife-edge at the 50.0 cm mark. With two 5.00 g coins stacked over the 7.0 cm mark, the stick is found to balance at the 41.0 cm mark. What is the mass of the meter stick? The answer is 38g but I don't understand

3. ## Math

The diameter of a car's tire is 52 cm. While the car is being driven, the tire picks up a nail. How high above the ground will the nail be after the car has travelled 0.1 km? It also asked me to graph this information. So I created a periodic graph that

4. ## chemistry

Will sodium sulfide and iron II sulfate form a precipitate? if so what would the reaction look like?

5. ## statistics 2

A football team consists of 20 each freshmen and sophomores, 15 juniors and 10 seniors. Four players are selected at random to serve as captains. Find the probability that: a) all four are seniors b) There is one each: freshman, sophomore, junior and

6. ## Grade 11 math - HELP!

The diameter of a car's tire is 52 cm. While the car is being driven, the tire picks up a nail. How high above the ground will the nail be after the car has travelled 0.1 km? can someone please explain how to solve this question?

7. ## Alg 2

Find A1 in a geometric series for which Sn=210, r=-2, and n=6? Can someone lead me in the right direction?

8. ## STUDY UNIT: MAIN IDEAS

In comparing an oak tree with a maple tree, you can correctly say that A. oak is often used to make ships, while maple is often used for furniture. B. both maple and oak trees lose their leaves in the fall. C. acorns are good to eat, while maple seeds

9. ## Chemistry

A rigid cylinder contains a sample of gas at STP. What is the pressure of this gas after the sample is heated to 410 K? a. 1.0 atm b. 0.50 atm c. 0.67 atm d. 1.5 atm Explain how you get the answer.

10. ## Chem H

How do you write a balanced net ionic equation for the reaction Cr2(SO4)3(aq)+(NH4)2(CO3)(aq)?

11. ## physics

A string has a linear density of 8.5*10^-3 kg and is under the tension of 280 N. The string is 1.8 m long, is fixed at both ends, and vibrating in the standing wave pattern. What is the speed, length, and frequency?

12. ## Algebra 2

Find the sum of the first six terms of the geometric series 81 -27 +9 -... how do you work it??

13. ## SCIENCE!!!!!

suppose that you dissolve 250ml of drink crystals in 1000ml of water. You get 1175ml of drink rather than 1250ml. how can you use the partical model of matter to explain this?

14. ## Chemistry

Which one in this pair has the larger radius? Explain a. Calcium atom or calcium ion b. Aluminum ion or Magnesium ion

15. ## physics

A window washer is standing on a scaffold supported by a vertical rope at each end. The scaffold weighs 210 N and is 2.80 m long. What is the tension in each rope when the 710 N worker stands 1.80 m from one end? smaller and larger.

16. ## Chemistry

What element has the final electron configuration as 3s2 3p4?

17. ## physics

A 581 kg satellite is in a circular orbit about the Earth at a height above the Earth equal to the Earth's mean radius. the orbital speed is 5590.98 m/s. Find the period of its revolution.

18. ## interesting log problem

log base 2n 1944 = log base n (486* (2)^1/2) find n^6

19. ## physics

The length of a simple pendulum is 0.79m and the mass of the particle at the end of the cable is 0.24 kg. The pendulum is pulled away from its equilibrium position by an angle of 8.5 degrees and released from rest. Assume that friction can be neglected and

20. ## physics

The pulley in Figure P8.59 has a moment of inertia of 7.0 kg·m2 and a radius of 0.50 m. The cord supporting the masses m1 and m2 does not slip, and the axle is frictionless.

21. ## Physics

A cube of solid aluminum has a volume of 1.00 m^3 at 20 degree C. What temperature change is required to produce a 100-cm^3 increase in the volume of the cube? I know you are supposed to use: DeltaV=Beta*Vo*DeltaT. But I don't know what Beta is and the

22. ## Physics

A car traveling at 50 km/h hits a bridge abutment. A passenger in the car moves forward a distance of 74 cm (with respect to the road) while being brought to rest by an inflated air bag. What magnitude of force (assumed constant) acts on the passenger's

23. ## chemistry

Hi ! Could you please help me to see through this problem. *I know it's asking me to find the hydrogen ion concentration in a bleach sample. *If the pH meter reads 9.55..this suggest to me this is a base. Maybe,I can use the equation: pOH = -log (OH^-) =

24. ## English

Can you please check these questions? Thank you very much. 1) Answer the following questions on literature. 2) Answer two of the following questions on the theme "fashion". 3)The Reformation derived (arouse?) from Henry VIII's quarrel with the Pope. 4)As a

25. ## chemistry

Hello, I have a question regarding the valence electrons of transition metals. I am aware of quantum numbers etc and how the s orbital gets filled before the d orbital but my question is that is if was asked to lets say group some elements according to

26. ## art

• What is un bel composto (according to Bernini)

27. ## soc 120

1. The average height of members of the high scho etball team is six feet, three inches. Jerry is on the high school basketball team, so Jerry must be taller than six feet. The argument above is flawed because it confuses (Points : 1) Jerry with other

28. ## ALGEBRAIC FRACTIONS

find the illegal values of C in the multiplication statement c^2-3c-10/c^2+5c-14 . c^2-c-2/c^2-2c-15

29. ## Physics Last Question HEEEELLLPPP !

#1 The internal energy of the gas in a gasoline engine’s cylinder decreases by 295 J. If 47.0 J of work is done by the gas, how much energy is transferred as heat? #2 If an ideal gas does work on its surroundings: a. The internal energy of the gas

30. ## Chemistry

Element M(a solid) reacts with an aqueous solution of compound B to form an aqueous solution of compound C(a salt) and a gas composed of element D. When 1.000g of element M is reacted with excess oxgen 1.658g of the compound MO are formed. Compound B is

31. ## biology

the unique properties of water make life possible on earth, select three properties of water and: a) for each propery, identify and define the property and explain it in terms of the physical/chemical nature of water b) for each property,describe one

32. ## chemistry

If you look at the side of a quarter, you can see layers of different metals. Is a coin a solid solution?

33. ## Chemistry

A sample of propane gas, C3H8, was collected over water at 25 degree Celsius and 745 torr. The volume of the wet gas is 1.25 L. What will be the volume of the dry propane at standard pressure?

34. ## science

Excume me but this is my second time posting this question. could you please help me, by telling me which properties are most useful foor identifing minerals and why? The choices are: a.shape b.luster/color c.density d.hardness e.streak I think the answer

35. ## Chemistry

What is the electron configuration of 3s23p4?

36. ## art

What role did art play in the religious conflict of the sixteenth-century? What were the positions of the Protestant Reformers and Catholic Church on the use and efficacy of art? how did the image debate influenced the succeeding period – the Baroque?

37. ## chem

Calculate the solubility of magnesium hydroxide (Mg(OH)2), ksp=1.1x10^-11? i have done this problem so many times and keep getting it wrong, i know the answer is 1.4x10^-4 but how do i get there? i did an ice chart and tried doing the cube root but its

38. ## ap chemistry

what is the molarity of a solution in which 80g of CaCl2 is dissolve in 2.5 L of solution?

39. ## chemistry

SF4 ---> SF2 + F2 rate constant (k) = .011 l/molxS [SF4]2 How many minutes will it take for the concentration of SF4 to be reduced from 2.5 M to .25 M? I said this was a 2nd order reaction and used : (1/final)= kt + (1/initial) and solved for t. the answer

40. ## Chemistry

Which quantity of particles is correctly represented by the formula H2SO4? Explain.

41. ## physics

1.) The average sound intensity inside a busy neighborhood restaurant is 3.*10^-5 W/M^2. How much energy goes into each ear (area = 2.1 * 10^-2 m^2) during a one hour meal? 2.) A member of an aircraft maintenance crew wears protective earplugs that reduce

42. ## chemistry

if the chemical equation is CaCO3(s) + 2HCl(aq) > CaCl2(aq) + H2O(l) +CO2(g) and represents the reaction of an antacid, CaCO3, with a acid,HCl. why might someone using this antacid experience discomfort due to gas pains?

43. ## Operations research

36) Consider the following minimization problem: Min z = x1 + 2x2 s.t. x1 + x2 ≥ 300 2x1 + x2 ≥ 400 2x1 + 5x2 ≤ 750 x1, x2 ≥ 0 What is the optimal solution?

44. ## Criminal Justice

A rectangle has a perimeter of 48m. The width is 2m less than the length. Use an equation to find each dimension.

45. ## college geometry

Given: right triangle ABC with right angle at C, AC=22 and BC=6.Draw altitude CD where D is o hypotenuse AB. What is the ratio of the area of triangle ADC to the area of triangle CDB?

46. ## physics

The pole vault landing pad at an Olympic competition contains what is essentially a bag of air that compresses from its "resting" height of 1.1 m down to 0.1 m as the vaulter is slowed to a stop. (a) What is the time interval during which a vaulter who has

47. ## chemistry

the rate of formation of NH3 is .15 mol/Lmin. What is the rate of this reaction? N_2_ + 3H_2_ ---> NH3 the answer should be .075 mol/Lmin.

48. ## physics

The volume flow rate in an artery supplying the brain is 3.10 10-6 m3/s. (a) If the radius of the artery is 4.50 10-3 m, determine the average blood speed. 1 m/s (b) Find the average blood speed at a constriction in the artery if the constriction reduces

49. ## science

The average solar radiation incident on the surface of the earth is about 1 KW/m2 for the entire year. A solar house is built with solar panels installed in the roof to provide the heating and electrical energy of the house. If the roof has a surface area

50. ## Dalton's Law of Partial Pressures

A sample of propane gas, C3H8, was collected over water at 25 degree Celsius and 745 torr. The volume of the wet gas is 1.25 L. What will be the volume of the dry propane at standard pressure?

a rock is dropped from a 20.0m bridge falls into the river below. a.)at whqat velocity does it strike the water? b.)how much time did the rock take to reach the water?

52. ## Chemistry

What volumes will each of the following occupy at STP? a. 1.80 x 10^24 molecules of SO3 b. 7.5 mol C2H6 c. 25.2 grams chlorine

53. ## fractions

Mr.shafier has been teaching school for 10 years.For 6 of those years he taught 8th grade.what fraction represents the time Mr.shafier has not been teaching 8th grade?I knoe the answere is 2 5ths. but how do i show work?HELP!!!!!!!!!!!!!!!

54. ## English (Easy question)

I'm a french dude so don't judge me :) -Children are slowly disappearing -Children began disappearing -Children began to disappear -Children disappeared Which one is the most correct form, for a short story.

55. ## Chemistry

how many molecules of CH4 gas are present in a 1.00 L flask of CH4 gas at STP?

56. ## science

I need an optometric project that will get me to state! last year i did my project over sharing mascara! anyone have GOOD ideas??? please i need a project badly :\

57. ## Math

(x,y) --> ( x-6, y - 3)

59. ## physics

a car moving at 15 meters per second skids to a stop in 20 meters. if the car travels at 45 meters per second, how far will it skid, assuming the same constant braking force

60. ## Chemistry

What happens to an electron when a photon hits it?

61. ## Finance

You aunt offers you a choice of \$60,000 in 40 years or \$850 today. If money is discounted at 11 percent, which would you choose.

62. ## english

when writing an essay is this a good way to do it?: thesis statement body paragraphs conclusion intro

63. ## history

what are three laws that were passed during antebellum era?

64. ## math

order the fractions from greates to least. 1/6, 2/7, 1/5. Can anyone help and explain this to me please

65. ## chemistry

If 2.00g of Zn is allowed to react with 1.75g of CuSO4, how many grams of Zn wil remain after the reaction is complete?

66. ## algebra

graph the equation and identify the y intercepts y + x = -10

67. ## history

Can't think of the word. What were women considered to be? like this isn't the word but house wife. Something to do with women were considered only right to stay at home.

68. ## physic

Two parallel wires carry current of 1.6 ka in opposite directions. the distance between the wires is r=1.6 m compute the magnitude of the force per unit length exerted by one wire on the other?

69. ## Chemistry 22

Which one in this pair has the larger radius? Explain a. Calcium atom or calcium ion b. Aluminum ion or Magnesium ion

5. What are the dimensions of the lightest open-top right circular cylindrical can that will hold a volume of .8L?

71. ## Chemistry

Why is dihelium less likely to exist than dihydrogen?

72. ## Geometry

Given tri ABC where A(4,-6) B, (-8,2) C (-4,8) A. Write the equation of the altitudes of triangle AC b. Determine the point of concurrency of the altitudes c. What is this point of concurrency called?

73. ## social studies

Where can I find some information about native americans

74. ## Physics

A cylinder has a cross-sectional area of 0.025 m2. How much work is done by a gas in the cylinder if the gas exerts a constant pressure of 7.8 x 105 Pa on the piston, moving it a distance of 0.080 m?

75. ## French III

How do I put these sentences in the subjunctive tense? Please help me! It is too bad that he died sitting in his chair signing papers in his Cardinal robe.

76. ## Math

The general gist of the question: Peter has to go to an office store, an electronics store, a clothing store, and a sporting store. There are 4 office stores, 4 electronic stores, 8 clothing stores and 5 sporting stores. How many combinations are there? Do

77. ## physics

A cylinder has a cross-sectional area of 0.025 m2. How much work is done by a gas in the cylinder if the gas exerts a constant pressure of 7.8 x 105 Pa on the piston, moving it a distance of 0.080 m?

78. ## PHYSICS HELP !!!!!

A 55 kg person runs with a horizontal velocity of 8.0 m/s and jumps onto a 7 kg skateboard which is initially at rest. Assuming negligible friction, what will be the final velocity of the skateboard and the person

79. ## Chemistry

What is the difference between a ground state electrom configurationa dn a final electon configuration?

80. ## us history`

a settled area that is a smaller political unit then a country or city is called a what>?

81. ## Economics

Are ipod nano conglomerates? Or are they apart of a conglomerates? If so, how?

82. ## Chemistry

PLEASE HELP! What amount of water could be heated from 20 degrees C to 50 degrees C by 714 kJ of energy?

83. ## Biology

what are the characteristics of a rosa indica? also i need help on the lifestyle/habitat of rosa indica too plz help appreciate the help

84. ## physics

While travelling a distance of 27m the velocity of a train increased from 12m/sec to 54km/hr what is the uniform acceleration of the train.

85. ## Algebra

A home’s back yard drops 9 feet over a horizontal distance of 124 feet. Find the slope of this back yard. Round your answer to two decimal places

86. ## physics

A string is stretched between two supports that are L = 0.9 m apart. It resonates at a frequency of f = 410 Hz with a standing wave pattern that has two nodes between the two supports. (a) Find the wavelength λ in meters. (b) Suppose that the tension, T,

87. ## College Math

For questions 1-2, apply the quadratic formula to find the roots of the given function, and then graph the function. 1. f(x) = x2 + 4 (6 points) g(x) = x2 - x – 12 For questions 3-4, factor the quadratic expression completely, and find the roots of the

88. ## History

I need help writing an analytical thesis statement. The topic is -Analyze the main problems facing the United States under the Articles of Confederation. How far did the US Constitution solve them?- I have a crappy thesis right now "The articles of

89. ## biology 30

effects of menopause

90. ## Finance

CC company's bonds mature in 10 years and have a par value of \$1000 and an annual coupon payment of \$80. Market Interest rate for the bonds is 9%. What is the price of these bonds?

91. ## Math

factor out 16x^2-80+100

92. ## math

A company requires the amount of \$645,000 in 15 years to retire a bond issue. Assume they can earn 4 1/2 % interest compounded daily. What amount would they have to pay quarterly to be able to retire this debt in 15 years?

93. ## math

If an annuity was set up for semiannual payments at the beginning of each period in the amount of \$1,478, what would be the value of this annuity after 9 ½ years with interest compounded daily at a rate of 3.75%

94. ## chemistry

The following errors occurred when the experiment was carried out. How would each affect the calculated molar mass of the solute(too high, too low, no effect)? Explain. a. The thermometer used actually read 1.4 centigrade too high. b. some of the solvent

95. ## physics

a spring with a spring constant 30.0 N/m is stretched 0.200 m from its equilibrium position. How much work must be done to stretch it an additional 0.100 m?

96. ## algebra

What is summation from zero to n of n+r C r.1/2^r?

97. ## physics

An object sits 29m above the ground and has a mass of 47 kg. How much potential Energy does it posses 1.5 seconds after falling?

98. ## social studies

What challenges might the United Kingdom face if the diversity of its population continues to grow?

99. ## Geometry

determine all possible values of x if 2x+10, 20-x, and 3(x-15) are the lengths for sides of a triangle

100. ## Physics

A lot of mass m2 = 28 kg hanging from a rope. The rope runs over a frictionless pulley and attached to a box of mass m1 = 52 kg. The box is on a plane with endpoints in A. Oblique Planet either by angle v = 180 in relation to the horizontal. The friction

101. ## chemistry

A 4.0 gram sample of iron was heated from 0 degrees celsius to 20 degrees celsius, and was found to have absorbed 35.2 Joules of heat. Calculate the specific heat of this piece of iron.

102. ## history

would anyone know why US increased spending during WWII? for what prosperity to protect it in the US? but why did they start...

(s+25)/2-100x10=5 solve for s

104. ## chemistry

A mixture of O2 and He is prepared for a scuba diver who is going to descend 200 ft below the ocean surface. At that depth, the diver breathes a gas mixture that has a total pressure of 7.00 atm. If the pressure of the O2 in the tank at 200 ft below the

105. ## businness

Regional Integration for and Against Articles • Felix, a U.S. technology company has recently developed a revolutionary wireless phone. The product offers exciting new features along with all of the features of current products, but at a fraction of the

106. ## Chemistry

Element M(a solid) reacts with an aqueous solution of compound B to form an aqueous solution of compound C(a salt) and a gas composed of element D. When 1.000g of element M is reacted with excess oxgen 1.658g of the compound MO are formed. Compound B is

107. ## English

Can you please check these sentences? Thank you. 1)What factors can have an influence (play a role?) on the way we dress? 2)Are you fashion conscious? Have you ever been to a fashion show? 3)Do you belong to any fashion conscious (?) teenage group? What

108. ## chemistry

If I have a Galvanic cell of Nickel and Gold where Nickel is (Ni->Ni^+2 + 2e-) and the oxidation of gold is (Ag^+->Ag + e-) then do I need to double the cell potential of gold (+0.80) if I'm trying to find the standered cell potential (volatage)?

109. ## medical terminology

Could someone please check my answers. If they are wrong could you give me the correct answer or tell me where to find it..Thanks in advance for all your help... 1.Uremia is the result of A. electrolye imbalance in the intracellular body fluids. B. a high

110. ## Math

How much would have to be invested at the end of each year at 6% interest compounded annually to pay off a debt of \$80,000 in 10 years?

111. ## physic help

The magnetic flux through a coil of wire changes from 8 Txm ^2 to zero in a time 0.5 s. what is the magnitude of the average voltage induced in the coil during this change? please explain your answer..

112. ## computer architecture

How many bits does a word of storage contain on the IBM-PC?

113. ## chemistry

Which acid,if it reacts in tincture of NaOH forms sodium hypochlorite?

114. ## math

What is 5 squared times 2 plus 5

115. ## English

I have to write a paper about how Through The Looking Glass is a sequel to Alice's Adventures in Wonderland. How are they different and how is it a sequel to it? I read the books but I don't know where to start

116. ## chemisrty

what voule of 12M hydrochloric acid must be diluted with distilled water to prepare 5.0L of 0.10M HCl?

117. ## Algebra

The world's largest lollipop weighs 2220 pounds, which is 10,126 pounds lighter than the largest Popsicle. What is the weight of the largest Popsicle?

118. ## maths

find the area of a square ABCD 16 square meter.find the area of the area joining mid points of the side

the primary audience for your mrssage is made up of? a. decision makers or opinion molders in an organization b. everyone who receives it c. individuals with highest status in an organization d. people who represent the opinions or attitudes of the

120. ## chemistry

what is the principle behind this test?add 5 drops of 10% sodium hydroxide and 1 drop of 0.5% copper sulfate to 5 drops of liver of pig in a sucrose solution?

122. ## a.p. calculus

find y' of the functuion in terms of appropriate variable. simplify as far as possible. y= ln(1+e^2x)^3

123. ## Chemistry

How many grams of KOH will be needed to boil a liter of cold water?

125. ## math

how do you compute 20 percent of 87/8

126. ## physics

calculate the horizontal force that must be applied to produce an acceleration of 1 g for 1 kg. puck on a horizantal frictiom-free air table.

127. ## a.p. calculus

find y' of the functuion in terms of appropriate variable. simplify as far as possible. y= 1+5^x^2-4tan(3x)

128. ## math

compute x+y, given the linear system with T is not = to 1 and with the ordered pair (x,y) as solution: x+2y=3 and Tx+(T+1)y=T+2

129. ## physics

A person walks 10 m in the + direction, 32 m in the - direction. What is the displacement of that person from their starting point.

130. ## math

hi: could anyone prove that the number of subgroups of order p of a group G is the same as the number of subgroups of index p? p is a prime here.

131. ## algebra

Find the mean for each set of data. Round to the nearest tenth if necessary. 12, 20, 8, 15, 16, 14, 7, 5, 11, 8, 14 a. 11.8 b. 13.2 c. 9.9 d. 10.4 My answer a)11.8

132. ## physics

A boat sails 251 km to the East and then 534 km to the North. What is the distance of the boat from its starting point?

133. ## precalculus

how you do you use the power-reducing formula to find the exact value of the trig function: sin^2(37pi/12)

134. ## geometry conditional form

I have a lot of cavities if I like candy a. Write the conditional form b. write the converse of the given conditional

135. ## com 155 week 6 help

I need to find the adjectives and adverbs in the following sentences, please help. I am having many problems with this. 1. The 2010 movie “Clash of the Titans is a remake of the 1981 film of the same name and not a new concept to the public. 2. Both

136. ## philosophy

What is the connection between habit and moral character?

Fun and silly slogan for element "iron"?

Trapezoid ABCD, top AD and bottom BC are parallel. AD is the smaller of the two parallel lines. Left AB is 45, bottom BC is 60, right CD is 30, top AD is unknown. Trapezoid EFGH is similar to ABCD, top EH and bottom FG are parallel. EH is the smaller of

139. ## Algebra1

2x-7+x=11-5x+6

There is one large rectangle ABCD, top line is AD and bottom is BC. A vertical line is drawn from the top to bottom called GH (between points AD and BC). A line is drawn from left to right called EF (between points AB and GH). AEFG is Rectangle 1. EBHF is

141. ## physics

1.) A vertical spring with a spring constant of 450 N/m is mounted on the floor. From directly above the spring, which is unstrained, a 0.30 kg block is dropped from rest. It collides with and sticks to the spring, which is compressed 2.5 cm in bringing

500 words on (how) to write about the law of april 6th 1830?help

143. ## child care

hello i need someone to check these for me? 6) alcohol,drugs,radiation,and pollutants that affect a child development are called a.teratogens b.toxic inhibitors c.tranferal agents. d.phenylanines 10) monstrates an inability to leap over a barrier, his

144. ## Physics

a person fires a rifle at a arget. the bullet leaces the rifle at 460 m/s and the person hears the bullet strike the target 2.00 seconds after firing it. the air temperature is 25.o celcius. what is the distance to the target?

145. ## Physics

a person fires a rifle at a arget. the bullet leaces the rifle at 460 m/s and the person hears the bullet strike the target 2.00 seconds after firing it. the air temperature is 25.o celcius. what is the distance to the target?

146. ## physic

an electric drill rated at 400 W is connected to a 240 v. how much current does it draw? explain your answer

147. ## history

describe Nixon's plan to cut spending.

148. ## chemical

NH4Cl at temperature 20 degree lattice length 3.88 angstrum and density 1.5 gm/cm3 if the molecular weight 53.5 gm find the unit cell

149. ## Algebra

why is any real number a solution for the equation 8y - 30 = 4(2y - 7.5)

150. ## Chemistry

How many grams of iron can be produced of 156000 calories of heat are absorbed by a large enough sample of iron III oxide

151. ## physics impulse

a baseball has a mass of 0.145kg. the ball is crossing the plate horizontally at 40 m/s when the batter hits the ball. The final velocity of the ball is 50 m/s stright up. what is the impulse that the batter gives the ball?

152. ## Geometry

Given: obtuse triangle ABC with obtuse angle B. Point D on side AC such that angle BDC is also obtuse. Angle DAB is 2/3 of angle ABD. Angle BCD is 1/5 angle BDC and angle CBD is 4 more than angle BAD. What is the measure of angle ABC?

153. ## Math

The length of a rectangle is 10 more than 1/2 the width. The perimeter is 38 feet. Find the length and width of the rectangle. The answer is L= 13, W=6 How do you get the answer???? Like how do you work it out to get that answer????

154. ## pre-cal

Find Zeros: F(x)=12x^3-107x^2-15x+24?

155. ## college geometry

In a triangle the ratio of the base to its altitude is 2:3. If the area of the trianlge is 108 square units, what is the length of the base?

156. ## Math

The length of a rectangular field is 3 yards less than twice the width. If the area of the field is 104 squared yards, what are the dimensions of the field? The answer is W=8, L=13 How do you work it out to get the answer????

157. ## chem.

I really don't understanf how jameschadwick discovered the neutron. iread websites and read the 18 pg. article but what was his experiment?

158. ## Math

Solve the equation or inequality for 3(2y-4)=9-3(y+1)The answer is 2. How do you work it out to get the answer? (x+5)(x-3)=9 the answer is -6,4 How do you work it out????

159. ## Algebra

An operation is commutative if you can change the order of the numbers involved without changing the result. Addition and multiplication are both commutative. Subtraction is not commutative: 2 - 1 is not equal to 1 - 2. So my question is what’s the

160. ## Math

Factor the following polynomials completely. How do you??? First question? 8x-4 Find the equation of the line that is perpendicular to 2x-y=3, and passes through the point (-4,1) The answer is -1/2x-1 ///how do you work it out to get the answer???

161. ## college geometry

The distance between Sue and a dude ranch was 30 miles straight accross a rattlesnake-infested canyon. Instead of crossing the canyon, she hiked due north for a long time and then hiked due east for a ahorter leg of the journey to the ranch. If she

it is between 1 and 2 maillion. The first three digits are the same. The least possible digit is in the thousands place. The greatest possible digit is in the ones place. the hundreds digits is 1 more than the tens digit. The sum of the digits is 21.

163. ## cultural diversity

I need help with identifying the difference in the three main groups, muslim, arabs, and christians where can I go to get some extra help

164. ## physical scince

answer the following question: QUESTION 4: What does it mean if a compound has a solubility of 15g in 100g of water at 0 degrees Celcius? A) 100 g of the compound will dissolve in 15 g of water at 0 degrees celcius B)15 g of the compound will dissolve in

165. ## chemistry

a sample has a density of 55g/mol and a volume of 11mL the sample mass is?

166. ## english

essay on wills

167. ## pre-cal **need help for test in the morning

Find zeros: f(x)=12x^(3)-107x^(2)-15x+24

168. ## Politics

Is there an election coming up in May 2011? What will be decided? If I'm turning 18 in March, when am I eligible to register to vote in it?

169. ## trig

Hank rides 2 hours total on a bicycle trip into the country and back. He rode out at the rate of 20 mph and returned at the rate of 24 mph. How far into the country did Hank ride

170. ## science

How many calories does it take to evaporate 1 gm of water at 37.5 degrees Centigrade

171. ## CHEM

a solution containing 30 g of nh3 in 70 g of water has a density of 0.882 g/ml. what is the molarity and molality

172. ## chemistry

How do you know when something has greater/smaller capacity? do you add them and the smallest one is for greater, and the biggest number is for smallest capacity? Which of the following solutions has the smallest buffering capacity? a. 0.821M HF and 0.217M

173. ## probability

78% of college graduates say they spent two years or less at their first full-time job after graduating college. you randomly select 10 college graduates and ask each how long they stayed at their first full-time job after graduating college. find the

174. ## probability

78% of college graduates say they spent two years or less at their first full-time job after graduating college. you randomly select 10 college graduates and ask each how long they stayed at their first full-time job after graduating college. find the

175. ## Human service

I have to explain why human service worker's uses the Rosenberg self esteem scale. This is what I have so far. Can you tell me where to find more information on why they use the scale and how my part sounds so far. Morris Rosenberg’s self-esteem scale is

176. ## chemistry

From this information- a + c_2_ ---> ac + c Slow ac + a ---> a_2_c Fast 2a + c_2_ ---> a_2_c + c Overall -you know that it is 1st order in a, 1st in c2, and 2nd overall. how? what about a reaction being fast or slow tells you if it's in first or second

177. ## chemistry

x + 2y ---> products is first order in c and 2nd order in y. what are the units of K, the specific rate constant, if the reaction rate is expressed in units of moles per liter per sec. I know the answer is M.s^-1^ but I don't understand this concept. could

178. ## physics

A cylindrical air duct in an air conditioning system has a length of 3.5 m and a radius of 5.00 X 10^-2 m. A fan forces air (ç = 1.8 X 10^-5 Pa·s) through the duct, such that the air in a room (volume = 242 m3) is replenished every 12 minutes. Determine

179. ## Calculus

Hello! I am a little stuck (probably because I cannot remember my trigonometric functions). Does anyone know how to solve this equation? [-sin(x)]^2-2cosx

180. ## English

I needed to know if you could tell me if I have identified the proper tense and verb of my sentences? I am not asking for the answer, just if it is correct or incorrect. The verb is in quotations and tense form in parenthesis. Thank you very much your

181. ## geology

Judging from the sizes of the before-and-after craters atop Mount St. Helens, which volcani event appears to have been more explosive, the last one before 1980, or that which occured in 1980? I thought it would be the one before 1980 since that would have

182. ## precalculus

1. Express (3x)^(1/5)(3x^2)^(1/3) using radicals 2. Simplify (8x^6 times 32y^5)^(1/2) 3. Approximate the real zeros of f(x)= 2x^4 + 3x^2 - 20.

183. ## Math

calculate the range, variance, standard deviation, and interquartile range for the data set given {72, 80, 80, 82, 88, 90, 96}

184. ## Math

what is a range, variance, standard deviation, and interquartile range

185. ## Geometry

Find the Coordinates of the other endpoint of a segment wiht one endpoint X(4,-6) and the midpoint M(1,5)

186. ## geology

If granite were melted in the laboratory, what would be the order in which its minerals would melt. The minerals inside are: most complete large crystallized mineral is X next complete small cryastallized mineral is Z next to least large crystallized

187. ## Geometry

What best describes the relationship between line y=2+8 and line 4y=8x+16 A. Parallel B. Perpendicular C. Skew D. Equivalent E. Intersecting

hello i need someone to check these for me? 6) alcohol,drugs,radiation,and pollutants that affect a child development are called a.teratogens b.toxic inhibitors c.tranferal agents. d.phenylanines 10) monstrates an inability to leap over a barrier, his

189. ## Math 7th

Write a descripition of each rule 1. (x,y) --> ( x- 11, y +4)

190. ## Math 7th

Write a description of each rule 2. (x,y) --> (x + 5, y - 2)

191. ## us history

what would teddy roosevelt put in a time capsule if needed to?

192. ## To Khaled/Peter -- business

I've removed your two posts with 10 essay questions. They look like a semester exam, yet you did nothing to show us your attempts at answers. This is a homework HELP site; it is not a cheat site.

193. ## math

solve v=(1/3)t+12

194. ## Gr. 9 math

There is one large rectangle ABCD, top line is AD and bottom is BC. A vertical line is drawn from the top to bottom called GH (between points AD and BC). A line is drawn from left to right called EF (between points AB and GH). AEFG is Rectangle 1. EBHF is

195. ## finance

Shafer Corporation issues callable bonds. The bonds are most likely to be called if

196. ## math

There are 250 applications for special training at the police academy. Only 40% of the applicants will be interviewed. However, only 46% of the persons interviewed will be ultimately chosen for special training. How many applicants will be selected?

197. ## physics

A 4.0 kg pulley of radius 0.15 m is pivoted about an axis through its center. What constant torque is required for the pulley to reach an angular speed of 25 rad/s after rotating 6.0 revolutions, starting from rest? What moment of inertia do I use to

198. ## Math

A lottery prize worth \$1,000,000 is awarded in payments of \$10,000 five times a year for 20 years. Suppose the money is worth 20% compounded five times per year. What is the formula used to find the present value of the prize?

199. ## Poetry

So this is just to double check to make sure all of these figures of speech are right. METAPHORS- thunder roared and shot crackling spears, as vicious hills unfolded, piercing wind howled in my ears, thunder crackled and exploded, and shot blinding

200. ## math

how to graph absolute value equations

201. ## Finance

You are currently investing your money in a bank account which has a nominal annual rate of 8 percent, compounded annually. If you invest \$2,000 today, how many years will it take for your account to grow to \$10,000?

202. ## literature

how to identify contradictions in literature

find two powers that have a product of 96, with at least one power greater than 1

204. ## English

I forgot to include the following questions. Thank you. 1) Anne Boleyn was executed and Henry VII married another four times. Elizabeth I restored the country to Protestantism. 2) She was often portrayed holding a rainbow, bearing the olive branch of

205. ## Physics

Hellow I have questiones in physics, it's google translate so my be it's not so easy. But thanks for the help A weight with mass (m2) = 28 kg hanging from a rope. The rope runs over a frictionless pulley and attached to a box of mass m1 = 52 kg. The box is

206. ## Science HELP

state whether each substance is a mechanical mixture, a suspension, or a solution. My answers are at the bottom. a)green relish b)soda pop in a glass c)bubble tea d)traditional Aborigial paint made of red orchre and grease my answers= a)suspension

207. ## Algebra

Using the compound intrest formula's A=P(1+r/n)^nt and A=Pe^rt to solve the problem given. Round the answer to the nearest cent. I have to find the accumulated value of and investment of \$20,000 for 6 years at an intrest rate of 4.5% compounded

208. ## Physics I'm so Lost!!

For a scene in a movie, a stunt driver drives a 1.90 103 kg pickup truck with a length of 4.09 m around a circular curve with a radius of curvature of 0.333 km. The truck is to curve off the road, jump across a gully 10.0 m wide, and land on the other side

209. ## chemistry

how many liters of nitrogen monoxide are formed if 8.75 g of ammonia are reacted in the presence of excess oxygen?

210. ## current events

these letters genmdimbserausit need to be unscrambled into two words and it has to do with Pearl Harbor attack.

the atmosphere..? a. creates tides b. has no effect on heat gain or loss c. allows heat to escape quickly in order to cool the planet d. keeps heat from escaping too quiclkly into space.

212. ## phsyical science

explain how the path of an electron differs in Bohr's model and in the modern model of the atom

213. ## Math

How many problems out of80 does a student need to have correct to receive a score of 85%?

214. ## phsyical science

what do you think an atom is made up of? what part of the atom caused the particles to bounce back?

215. ## Lang. Arts

What are some quotes that pertain to life in the book Whirligig, by Paul Fleischman. I need 6. Thankk you(:

216. ## physics

I need help with an equation for: Find the force of attraction between a bowling ball of mass 7.26 kg and the earth if the bowling ball was located at sea level. How does this compare to the weight of the bowling ball as calculated by Fg = mg? Thank you

217. ## us history

Why does Lincoln sign the Emancipation Proclamation even though he said early on that he wasn't going to abolish slavery in the south? What fears could have kept him from signing it?

218. ## us history

What advantages does the Union have over the Confederacy? The Confederacy over the Union?

219. ## computers

which one of the following elements must be contained in an access database

220. ## sentence

where did you grow up

221. ## US History

During the reagan years, what happened to the overall course of the budget deficit? a) it rose b) it fell c) it increased by 210 billion d) it increased then fell back to its original levels I think D is this correct ..?

222. ## civils

a blank includes a central city and the suburbs that surround it.

223. ## CHEM

Calculate q when a system does 54 J of work and its energy is increased by 61 J?? I know the total change in energy of a system is "q + w", but I don't don't how to apply this.

224. ## us history

a larger city in which the mayor has significant executive powers usally uses a (blank)>?

225. ## science

a solution of hcl of concentration 1.5 mole/liter is mixed with another solution of hbr of the same concentration. calculate: 1)ph of hcl solution alone 2)ph of the final mixture

226. ## Math

Let f(x)=-(x-1)^2+4 Solve f(x)=0 to find the x-intercepts

227. ## Calculus

Hello! I am a little stuck (probably because I cannot remember my trigonometric functions). Does anyone know how to solve this equation? [-sin(x)]^2-2cosx

228. ## Gr. 9 Math (continued)

I don't see a problem but I will rewrite the structure. Make two rectangles attached together. Call the first rectangle ABHG (AG top, BH bottom). Call the second rectangle GHCD (HC top, GD bottom). Draw a horizontal line from line AB to line GH and name

229. ## PHYSICS MOMENTUM

A(n) 3800 kg rocket traveling at 2500 m/s is moving freely through space on a journey to the moon. The ground controllers ﬁnd that the rocket has drifted off course and that it must change direction by 9.2 degrees if it is to hit the moon. By radio

230. ## Highschool Physics

A 55 kg person runs with a horizontal velocity of 8.0 m/s and jumps onto a 7 kg skateboard which is initially at rest. Assuming negligible friction, what will be the final velocity of the skateboard and the person?

231. ## us history

A city that writes its own charter, chooses its own type of government, and manages its own affairs is one that has (blank)???

232. ## Highschool Physics

A cylinder has a cross-sectional area of 0.025 m2. How much work is done by a gas in the cylinder if the gas exerts a constant pressure of 7.8 x 105 Pa on the piston, moving it a distance of 0.080 m?

233. ## history

does this sound right: "mobilization of goods" related to WWII

234. ## Chemistry 1

What mass of potassium oxide is produced by the oxidation of 5 grams of potassium?

235. ## us history

A state will (blank)a locality when it officially organizes its government and provides services for its residents?

236. ## Math

sin^2 theta + 2 cos theta -1/ (sin^2 theta +3 cos theta-3= cos^2 theta+cos theta/ (-sin^2 theta) Prove the identity.

237. ## History

I need help in history. I have to write a 4-5 paragraph essay on world war one, but I need information. Could someone please summarize the main things that happened in world war one? Please don't write an essay, I just need someone to tell me the very

I have 2 question on science 7. please help me. 1.state whether each substance is a mechanical mixture, a suspension, or a solution. My answers are at the bottom. a)green relish b)soda pop in a glass c)bubble tea d)traditional Aborigial paint made of red

239. ## Science

Could you please help me, by telling me which properties are most useful foor identifing minerals and why? The choices are: a.shape b.luster/color c.density d.hardness e.streak I think the answer is color/luster, streak and hardness.

240. ## APUSHistory

Why did jackson disobey his superiors even though he was a stickler for discipline?

241. ## Physic

A spherical concave mirroe has a radius =0.4m forms an image of a 0.2 m high object located 1m from the vertex of mirror. find the position and height of the image. ? please explain your solution

242. ## math

if an equilateral triangle has a perimeter of 24 inches, what is the length of each side and please explain why because i don't really understand this! help!

243. ## Gen Chemistry

The following absorption data of a solution was collected in a cell with 1 cm path length. The absorption of the same substance in a solution with unknown concentration was 0.197. What is the concentration of the unknown substance? c (M) A 1.00x10-3 0.119

244. ## chemistry

what are the solvent and solute in a solution containing 100g of ethanol and 3g of sucrose?

245. ## AP Calculus AB

The sum of x and y is 8. What is the maximum value of xy-x^2? Please help!

asked by DUE TOMORROW NEED HELP!
246. ## us history

i need help) when a council member runs in a citywide electoin rather then representing only one district, he pr she is elected in a(an) (blank)

247. ## chemistry

If iron is exposed to air, it begins to rust. What conclusion can you make about air, based on this observation?

.02(2X-3)-0.03(3x(.2)=-.02

249. ## Math

Write the Unit Rate as a fraction? 13 grams per cubic centermeters... there are other problems like this but i just need to know how to do this.

analogie:After is to before as epilogue is to

251. ## math

can someone please answer these questions for me?: 1. if the measure of an interior angle of a regular pentagonis 108 degrees, then the angle sum of that regular pentagon must be: A. 120 degrees B. 360 degrees C. 540 degrees D. 720 degrees 2. is it

252. ## us history

1)some cities follow a (blank) in which the mayor has limited authority. 2)A community that is near or around a city is called a (blank) 3) a (blank) is a unit of government that deals with a specif function, such as education,water supply, or

253. ## social studies

what is the job of the judicial?

254. ## Math

Write a description of each rule (x,y) --> (x + 5, y -2)

255. ## us history

A city council is in charge of passing a city law, or (blank) < and approving the city budget. 2/ a (blank) is a document that grants power to a local government,

256. ## Binomial Coefficient

Evaluate: n n-2 (expression should be in large brackets) I got n! /n-2! 2! . I know this is wrong but am not sure what to do next.

257. ## English

Thank you very much for your corrections.Can you have a look at the following questions for me? Thank you. 1) What do you use to carry things that you need to wash with? (a sponge bag) What do you use to wash floors? (a mop) What do you use to pour water

258. ## physics

A 685 kg elevator starts from rest and moves upward for 2.80 s with constant acceleration until it reaches its cruising speed, 1.71 m/s. (a) What is the average power of the elevator motor during this period? (b) What is the average power during an upward

259. ## physics

If 53 W of power are exerted and the amount of work done is 7 N-m, how much time did it take?

260. ## Science

I have posted this question before and I have waited for 3 hours and no one is helping me. Please help me. I have 2 questions. 1.state whether each substance is a mechanical mixture, a suspension, or a solution. My answers are at the bottom. a)green relish

261. ## AP Calculus AB

A farmer wants to create a rectangular pen, which will be divided into six separate sections, as shown in the accompanying diagram. If he has 600 feet of fencing to use, what outside dimensions will maximize the area of the pen?

262. ## History

Name three people during antebellum era that weren't president that were helpful. And what did they do.