# Questions Asked onMarch 8, 2012

1. ## math

a building is 219 feet tall. for a class project, jim is to make a scale model of the building to place in the front hall display case. the display case is 28 inches tall. which scale will allow him to make the tallest model that will fit in the display

2. ## Math

How do factor a binomial with cubed roots? cos^3+sin^3/cosx+sinx = 1-sinxcosx

3. ## calculus

dy/dx in terms of x and y if x^4+y^2=sqrt(15)

4. ## Physics

A car travels the same distance at constant speed around two curves, one with twice the radius of curvature of the other. For which of these curves is the change of the velocity of the car greater? Explain.

5. ## Physics

The acceleration of gravity at the surface of the moon is approximately 1/6 that at the surface of the Earth (9.8m/s). What is the weight of an astronaut standing on the moon whose weight on Earth is 180lbs?

6. ## Calculus

It took 1800 J of work to stretch a spring from its natural length of 2m to a length of 5m. Find the spring's force constant. Please help. Thanks in advance.

asked by JEUCD 37
7. ## algebra

The diameter of an electric cable is normally distributed, with a mean of 0.8 inch and a standard deviation of 0.01 inch. What is the probability that the diameter will exceed 0.81 inch

8. ## Trig Proofs!

I'm having trouble solving this proof. Can you help? cos^3+sin^3/cosx+sinx = 1-sinxcosx Thanks!:)

9. ## English

Writeacher, you didn't manage to check my post yesterday. I really need your help to rephrase just this part. Thank you very much in advance! 1) Mr. Gradgrind turns his attention to (picks on?) Bitzer, "perhaps because he chanced to sit in the same ray of

10. ## calculus

Find a unit vector U such that the rate of change of f in the direction of U at the given point is maximum. point being (3,5,pi) I know hos to do this when given a direction but since im asked to ind the unit vector first it kinda throws me off. do i just

11. ## physic

A long straight horizontal wire carries a current = 3.90 A to the left. A positive 1.00 C charge moves to the right at a distance 1.50 m above the wire at constant speed v = 5000 m/s. What is the magnitude of the magnetic field at the location of the

12. ## physics

The figure shows a golf ball passing through a windmill at a miniature golf course. The windmill has 8 blades and rotates at an angular speed of 2.02 rad/s. The opening between successive blades is equal to the width of a blade. A golf ball of diameter

13. ## math

In a production of west side story, eight actors are considered for the male roles of Tony, Riff, and Bernardo. a.) is this permutation or combination? b.) in how many ways can the director cast the male roles?

asked by malik jackson
14. ## math

How to solve a three set problem

15. ## statistics

Air America is considering a new policy of booking as many as 400 persons on an airplane that can sear only 350. (Past studies have revealed that only 85% of the booked passengers actually arrive for the flight.) Estimate the probability that if Air

16. ## math

the distance between 2 station A and B is 230 km .two car start simultaneously from A and B in the opposite directions and the distance between them after 3 houra is 20 km. If the speed of one car is less than that of the other by 10 km per hour, find the

17. ## work hours

If i am making \$11.50 an hour, 4 hours a day from monday through friday, how much do i get by the end of the month?

18. ## math

A certain amount earns 10percent interest compounded annually .What is the minimum number of years(in integers) it takes to double the amount ??

19. ## equation

the smallest 3 consecutive integers is added to twice the largest , the result so obtained is fifteen less than four times the middle integer. find the integers

20. ## Calculus-derivatives

Determine the derivative for y=tanxcosx a) y'=-sinxtanx + cosxsec^2x b) y'=-sinxtanx + cosxtanx c) y'=cosxsec^2x d) y'=sinx - cosxsec^2x

21. ## Calculus

Glenview Community College wants to build a rectangular parking lot on land bordered on one side by a highway. It has 380 feet of fencing to use on the other three sides. What should be the dimensions of the lot if the enclosed area is to be a maximum?

22. ## statistics

Question Details The following data was collected to determine whether or not Monroe County College students work 18 hours per week: 20,22,25,12,30,49,10,30,17,15,0,24,20,22,23,20,25,24,30,12,15,29,0,25,2,40,30,0,33,0,45,30,38,48,0,40,20,0,0,24. a)

23. ## kinematics

A man stands on a slope of 20 degrees.His weight is 65kg. Given that the coefficient of static friction is 1.5, Calculate the maximum angle that the slope can have to the horizontal before he begins to slide. Also how does the pressure on his feet change

24. ## government

Which branch of the law regulates wrongful acts involving injury to one’s person, property, or reputation in a situation not covered by the terms of a contract? A. common law B. tort law C. civil law D. contract law

25. ## Economics

Help Please! How does self-interest help achieve society’s economic goals?

26. ## Economics

Why is there such a wide variety of desired goods and services in a market?

27. ## Chemistry

Asprin(acteyl salicylic acid) can be synthesized by reacting acetic anhydride with salicylic acid. Assume the reaction was run and 1.75 grams of a solid product was obtained. Recrystalization of the 1.75 g mixture yielded 1.50 g of asprin. a. What was the

28. ## Chemistry

List at least four distinct advantages of the metric system over "our" measurement system.

29. ## Chemistry

Express each of the following with three significant figures. 0.002537 12345000 0.07966 620.2

30. ## Statistics

What significance does variance have to a set of data? is variance the same as coefficent of variation? when using coefficient of skewness, if you have a +1 or -1 value it signifies a high degree of skew. So does that refer to a postive/ negative skew or

31. ## physics

A circuit contains a 10 µF capacitor and a 30 µF capacitor connected in parallel. What is the total capacitance of the circuit?

32. ## Chemistry

When preparing home-made ice cream, salt is added to the ice-water mixture. What is its function and why does it work?

33. ## Chemistry

Antifreeze (commonly ethylene glycol or propylene glycol) is usually mixed with water in the radiator of a car. What is its function and how does it work?

34. ## Chemistry

The reaction of aqueous solutions of barium chloride and sodium sulfate results in the formation of a precipitation of barium sulfate. Sodium chloride is also formed but is soluble in water. Why would you use filtration to isolate the barium sulfate rather

35. ## maths

What is a 9.8 meter x 6.1 square?

36. ## Chemistry

In fertilizer manufacturing the cimpounds below are mixed together to form a composite fertilizer. My question is: Is there a reaction between SOLID ammonium phosphate, potassium chloride, ammonium nitrate, and superphosphate? (or any combination? or will

37. ## Art

What are the six architectural features of the Chartres Cathedral?

38. ## Chemistry

Melting Point Determinations 1. Melting range of impure vanillin 2. Melting range of recrystalized vanillin 3. Melting range of 50% recrystallized vanillin + 50% phenyl carbonate

39. ## Catering(Gourmet Essentials)

THURSDAY March 8, 2012 SCHOOL SUBJECTS - Art - Business - Computers - English - Foreign Languages - Health - Home Economics - Math - Music - Physical Education - Science - Social Studies GRADE LEVELS - Preschool - Kindergarten - Elementary School - 1st

40. ## Algebra

31 - 2/3X > 27, then X < ?

asked by Calais High
41. ## English

Writeacher, you didn't manage to check my post yesterday. I really need you to check just this part. I also included a few other things. Thank you very much in advance! 1) Mr. Gradgrind turns his attention to Bitzer, perhaps because he, though sitting a

42. ## physics

an ideal monatomic gas is allow to expand slowly until its pressure is reduce to exactly half its original volume. By what factor those the volume change if the process is (1)isothermal (2) adiabatic

43. ## Math

w/4-w/5-1/3=16/15 Please help me solve this and show your work. I Need it ASAP

44. ## math

. A certain amount earns 10percent interest compounded annually .What is the minimum number of years(in integers) it takes to double the amount ??

45. ## English

I don't have time to express these ideas more clearly. I really rely on your help, Writeacher. My sister's husband works as a journalist and therefore she and the children will probably accompany him to London for the Olympic Games and will be attending a

46. ## 3 grade math ms sue

Name the lengths of the sides of three rectangles with perimeters of 12 units. Use only whole numbers. My son did -2-4-2-4 And one more 1-5-1-5 And one more 3-3-3-3 And I need one more rectangles number how you can make

47. ## Communication

Things that a sender have and a receiver doesnt

48. ## american gov.

When did the U.S. tradition of state government being organized by a founding document first start? . . Can somebedody help me, where can I found the answer?? thanks

49. ## kuwait

You are camping with two friends, Joe and Karl. Since all three of you like your privacy, you don't pitch your tents close together. Joe's tent is 16.0 from yours, in the direction 22.0 north of east. Karl's tent is 39.5 from yours, in the direction 39.5

50. ## trig

Simplify the expression cos^2 x (sec^2 x-1)

51. ## Math

A bag contains 5 balls,8 white balls, 9 green balls,7 blue balls& 6 yellow balls.A ball is drawn at random .Find the probablity that the ball in neither green nor red ?

asked by Rajit Rastogi
52. ## Trig

HELP!!!! I don't know how to do the trig identity with this problem csc^4 x-cot^4x= Csx^2 x + cot^2x

53. ## Social Studies

Did the Emperor of Qon's efforts to unite China make him an effective ruler? Is the answer very ineffective or very effectve?

54. ## physics

an ideal monatomic gas is allow to expand slowly until its presssure is reduced to exactly half its original value. By what factor does the volume change if the pressure is (1) isothermal (2) adiabatic

55. ## geometry

The radius of a ball is approximately 9 inches. Which is the best estimate for the surface area of the ball?

56. ## accounting

P9-4A (a-d) Wall Inc. uses the allowance method to estimate uncollectible accounts receivable. The company produced the following aging of the accounts receivable at year end. Number of Days Outstanding Total 0-30 31-60 61-90 91-120 Over 120 Accounts

57. ## physics

an ideal monatomic gas is allow to expand slowly until its pressure is reduced to exactly half its original value. By what factor those the volume changes if the pressure is (1)isothermal (2)adiabatic. Please is the answer suppose to be a calculation or an

58. ## math

"joyce is decorating her store window for a going-out-of-business sale. she wants to design some art that looks like the diagram shown below. She will paint the shaded portion. How many square meters will she need to paint?"

59. ## geometry

Sam has a rectangular garden plot that measures 10 feet by 25 feet. He plans to increase the size of the garden next year. The new dimensions will be 5 times the size of the dimensions of this year’s garden. What will the impact on the perimeter be?

60. ## applied chemistry

a 69.3g sample of oxalic ac acid, H2C2O4, was dissolved in 1.000L of solution. How would yo prepare 1.00L of 0.150M H2C2O4 from this solution?

61. ## English

Could you please check these sentences? Thank you. 1) Make yourself at home and help yourself to a cup of tea. After waking up it takes me a while to get up. 2) Have you woken the child up? She apologized to me for arriving late/for not doing her

62. ## physics

A CD has a mass of 17.4 g and a radius of 6.01 cm. When inserted into a player, the CD starts from rest and accelerates to an angular velocity of 20.0 rad/s in 0.901 s. Assuming the CD is a uniform solid disk, determine the net torque acting on it.

63. ## math

Ellen placed a string from one point on a circle, through the center, and to a point on the other side of the circle.Approximately how many times can this length of string fit around the outside of the circle?

64. ## math

When rolling a die once and tossing a fair coin once, all of the following are possible outcomes except which one? 1. 6H 2. 4T 3. HT 4. 1H

65. ## math

Ethan , Marta , and Roscoe found a large aluminum ring, 10 feet in diameter, in a field about 100 feet behind Ethan's house.They estimated the number of complete revolutions that the ring would take if they rolled it to the house. Ethan estimated 10

66. ## math

A recipe for one large cake calls for 3 2/3 cups of flour. Anya has decided to increase each ingredient in the recipe by 2 1/2. How many cups of flour does she need?

67. ## chemistry

predict the solubility of 2-propanol in dichloromethane and in water. Can someone explain how they came to their conclusion because I just don't understand how to determine solubility.

68. ## geometry

if the altitude of a triangle is 5 inches and the base is 10 inches long what is the area?

69. ## Calculus

The height of a particle is given by the equation f(t)=t^2+2t+6 (a) What is the average velocity of the particle on the interval [2,3]?b.What is its instantaneous velocity at t = 2. What is the instantaneous velocity of the object at any time t?

asked by Jessica Chaney
70. ## english

how would I start a formal outline on early childhood education/ intervention

71. ## Pre Alegebra

Simplify: 10w - 11w + 4W + (-5W)

72. ## English

I need you to check these sentences. I would like to rephrase n.1-2, too. Thank you very much!! 1)Describe how Mr Gradgrind is portrayed by Dickens in Chapter 2 of Hard Times. What is his surname symbolic of? How does he address his pupils and what kind of

73. ## nonfiction

When does the Narrative of Sojourner Truth take place

74. ## Science

Which of the following conditions would likely cause the activation energy to be high? A. atoms are close together B. the temperature is hot C. atoms are not close together D. a catalyst is present.

75. ## Science

Which of the following materials will burn the fastest in open air? A. a log, two feet in diameter B. two logs, each one foot in diameter C. a pile of small splinters made from a two-foot diameter log D. Both logs and the splinters will burn at the same

76. ## English

Hello. I will really appreciate some help. 1)Are the structures with "yet" correct: a)"he hasn't said yet how long..." b)"he hasn't yet said how long..."? 2)Which word order is correct: "he spoke with the prime minister over the phone" or "he spoke over

77. ## english

I did my thesis paragraph. 1. history 2. background 3. theory 4. benefits Is their any sample that I can see, so I know if Im in the right direction

Is limitless growth really possible? What forces do you think will be most important in slowing or halting economic growth?

asked by Walter Robinson
79. ## geometry

Show that centeral angle of n-sided regular polygon is 360/n

80. ## Life Orientation

Wha,according to the Basic conditions of employmet Act applies with regard to the contraventions that you have identified?

asked by Sangweni Siphamandla
81. ## college physics

a 1.0 N-weight is hanging at rest as shown. In each case, write in the magnitude of the unknown force. a) chain with a weight of 2.5 N has a 1.0 N hanging weight b) chain with a weight of .5 N has a 1.0 N hanging weight c) stretched elastic band with

82. ## Physics

A smooth circular hoop with a radius of 0.400 m is placed flat on the floor. A 0.450-kg particle slides around the inside edge of the hoop. The particle is given an initial speed of 8.50 m/s. After one revolution, its speed has dropped to 4.00 m/s because

83. ## physics

Sewage at a certain pumping station is raised vertically by 5.27 m at the rate of 1 930 000 liters each day. The sewage, of density 1 050 kg/m3, enters and leaves the pump at atmospheric pressure and through pipes of equal diameter. (a) Find the output

84. ## physics

An 82.0 kg skydiver jumps out of a balloon at an altitude of 1 500 m and opens the parachute at an altitude of 195 m. (a) Assuming that the total retarding force on the diver is constant at 55.0 N with the parachute closed and constant at 3 600 N with the

85. ## geometry

A wooden pyramid, 12 inches tall, has a square base. A carpenter increases the dimensions of the wooden pyramid by a factor of 5 and makes a larger pyramid with the new dimensions. Describe in complete sentences the ratio of the volumes of the two

86. ## Math

eff cuts lawns for \$20.00.next year, he will charge \$4.00 more per lawn. what is the percent increase will he charge

87. ## walter

A positive charge of 1.5x10^-8 C experiences a force of 0.025 N to the left in an electric field. What are the magnitude and direction of the field?

88. ## geometry

The perimeter of rectangular playground is 200 feet. If the length is 5 feet less than twice the width, what are dimensions of the playground

89. ## physics

Calculate the hang time of a person who moves horizontally 2.00 m during a 1.23 m high jump. Express your answer with the appropriate units

90. ## physics

A -4.0UC charge is located 0.45m to the left of a +6.0uc charge. what is the magnitude and direction of the electrostatic force on the positive charge?

91. ## physics

the elecric potential at a certain point is space is 12 V. What is the electric potential energy of a -3.0uc charge placed at that point? is it +36uj?

92. ## physics

Calculate the force of gravity between Earth (mass = 6.0 * 10^24 kg) and the Sun (mass = 2.0×10^30 kg). The average Earth-Sun distance is 1.5×10^11 m..

93. ## statistics

For this discussion you will need to come up with twenty different data points and enter them into the first column in Excel. The data points can be any numbers you want as long as there are twenty of them. You will then use the descriptive statistics

94. ## Physics

A CD has a mass of 17.0 g and a radius of 5.98 cm. When inserted into a player, the CD starts from rest and accelerates to an angular velocity of 19.1 rad/s in 0.744 s. Assuming the CD is a uniform solid disk, determine the net torque acting on it.

95. ## English, please check

Is this paragraph right? Newspapers are a great way to start your day. Many people think newspapers contain only dreary news, well their wrong. Newspapers are surprisingly interesting, and you might actually like them. There even might be something about

asked by Abigail Paige
96. ## science

on mars, the buggy travelled 24m in 16 secs calculate its speed

97. ## Trig

How do you do this? 1-sin^2x/csc^2 x-1

98. ## critical thinking

Read the scenario. Using the information provided in the references and lesson, arrive with your best possible solution. You are a squad leader in Sapper platoon, Special Troop Battalion, 3rd Brigade, 10th Mountain Division. Your unit will deploy to

99. ## Physics

A figure skater is spinning with an initial angular speed of 6.9rad/s. She then pulls her arms in, reducing her moment of inertia to 0.38 times its original value. What is her angular speed after pulling in her arms?

100. ## physics

A horizontal circular platform (m = 108.1 kg, r = 3.25m) rotates about a frictionless vertical axle. A student (m = 85.3kg) walks slowly from the rim of the platform toward the center. The angular velocity, omega, of the system is 2.5 rad/s when the

101. ## physics

A wheel has a radius of 4.56 m. How far (path length) does a point on the circumference travel if the wheel is rotated through an angle of 26.2°?

102. ## math

In a particular year group one quarter of the pupils come to school by and 40% take the bus the remaining 42 pupils walk to school. How many pupils are in the year group

103. ## physiscs

a 75w and 50 w incandescent light bulbs are designed fot use with the same voltage. what is the ratio of the resistance of the 75- w bulb to the resistance of the 50 w bulb?

104. ## Chemistry

Why was gravity filtration used instead of evaporation to isolate the calcium cabornate?

105. ## Chemistry

What happens to the salt concentrate in a saturated solution if the water is allowed to evaporate (assume the temperate is maintained)? Explain your answer.

106. ## statistics

can you help me lotto sequence math for 5/90 game

107. ## Chemistry

Suggest reasons why recrystalization from water would probably not be a suitable procedure for purifying the following substances: sodium chloride Calcium carbonate ethanol

108. ## Chemistry

(1.5x10^-3 mole)6.022x10^23 molecules)/1 mole =

109. ## Chemistry

Is there any periodicity in the maximumm oxidation number for elements 11 through 17? If so, explain your answer.

110. ## Chemistry

Mass of weighed filter paper ? Mass of weighed filter paper plus recrystallized vanillin? Mass of recrystalized vanillin Mass impure vanillin Percent recovery Suggest how you could have improved your techniques to increase your percent recovery.

111. ## chemistry

how much energy is needed to melt 25.4 g of I2 if enthalpy fusion of I2 is 61.7 J/g

112. ## Chemistry

A 55.81 gram irregular object made out of one of the metals in #6 raises the water level in a graduated cylinder from the 17.6 mL level to the 24.7 mL level. What is the density and identity of the metal?

113. ## Calculus

Find the local linearization of f(x) near x=0 and use it to approximate the value of a. f(x)=sqrt((b^2)+x) a=sqrt(26)

114. ## Chemistry

would the melting range of a new compound be worth determining and if so, why?

115. ## Accounting

Which of the following expenses is deductible, but subject to the 2% limitation on Form 1040, Schedule A; Job Expenses and Most Other Miscellaneous Itemized Deductions? A. A blue suit for an accountant b. Uniforms for a UPS delivery person c. The cost of

116. ## Accounting

For the current year, Sheila Jones had adjusted gross income of \$100,000. During the year, she contributed \$6,000 to her church and an additional \$3,000 to qualified charities. She also contributed religious artwork with a fair market value of \$60,000 and

117. ## Math 11

perform the indicated operation and give the answer in simplified form. ((x-1/x+1)-(x+1)/(x-1))/ ((x-1/x+1)-(x+1)/(x-1)) =0 ?

118. ## physics

The pressure under the surface of a liquid increases with depth. Determine the pressure in Newtons per square meter on a lake at a depth of 100 meters (over 300 feet).

119. ## physics

A cube of lead measuring 1 meter on each side is thrown into the ocean. Determine the buoyant force acting on this mass of lead. The density of lead is 11.4 grams/ cubic centimeter

120. ## Math

If the time elapsed is 4.26 min, what is the value of the rate constant, k? ln[R]t / [R]o = -0.0237 I am not sure how to slove this. Would I do ln 4.26 min X -0.0237?

121. ## chemistry

A 75.0 sample of 1.50×10^−2 Na2SO4 is added to 75.0 mL of 1.26×10−2 Ca(NO3)2. What is the % Ca undissolved

122. ## chemistry

What would happen if O2 were added to N2(g) + O2(g) 2NO(g) at equilibrium?

123. ## Math

The height of a ball t seconds after it is thrown upward from a height of 6 feet and with an initial velocity of 80 feet per second is f (t) = -16t^2 + 80t + 6. According to Rolle's Theorem, what must be the velocity at some time in the interval (2, 3)?

124. ## Math

ln [5.01E-3] = ln(4.86E-2) - (1.80E-2s-1)(t s) Solve for t. t = 126 s First I did 4.86e-2 - 1.80e-2 and then on my calculator I pressed the 2nd button and then ln and got 1.031. Then I did the same thing to get the ln of 5.01e-3 and divided that by 1.031

125. ## chemistry

Ammonium iodide dissociates reversibly to ammonia and hydrogen iodide. NH4I(s) Picture NH3(g) + HI(g) At 400°C, Kp = 0.215. Calculate the partial pressure of ammonia at equilibrium when a sufficient quantity of ammonium iodide is heated to 400°C.

126. ## chemistry

Stearic acid, nature's most common fatty acid, dimerizes when dissolved in hexane: 2C17H35COOH Picture (C17H35COOH)2; ΔH°rxn = -172 kJ The equilibrium constant for this reaction at 28°C is 2900. Estimate the equilibrium constant at 38°C.

127. ## science

wich material is the most dense air water plastic or iron

128. ## math

George is making a circle graph of the basketball shots he made during the season. He made 16 foul shots, 29 two-point shots, and 5 three-point shots. What will be the measure of the angle he makes when creating the sector for foul shots?

129. ## English

Hello. I will be very grateful for your help. 1) Is it possible to use "for the present" in the meaning "so far" in the context "she hasn't said for the present how long she will stay in London"? 2)Is it possible to use an infinitive after "to come to

130. ## chemistry

The Haber process for ammonia synthesis is exothermic: N2(g) + 3H2(g) 2NH3(g) ∆H° = -92 kJ If the equilibrium constant Kc for this process at 500.°C is 6.0 ξ 10-2, what is its value at 300.°C?

131. ## chemistry

Write the expression for Kc and Kp for the reaction PH3BCl3(s) PH3(g) + BCl3(g)

132. ## Calculus 1

A rectangular field is enclosed by a fence and separated into two parts by a fence parallel to one of the sides. If 600 m of fencing is available, what should the dimensions be so that the area is a maximum?

133. ## physics

How would one plug the gravitational constant into an equation? To be honest, I'm having a hard time with the idea of the gravitational constant in general, but I need to solve an equation for the circular velocity of a galaxy. I know I need to multiply

134. ## Calculus

A box with an open top is to be made from a square piece of cardboard by cutting equal squares from the corners and turning up the sides. If the piece of cardboard measures 12 cm on the side, find the size of the squares that must be cut out to yield the

135. ## Literature

The best in this kind are but shadows" is A. Titania talking about men. B. Theseus talking about plays. C. Demetrius talking about the women he has loved in the past. D. Bottom talking about his fellow craftsmen.

136. ## Math

What is a motion pattern?

137. ## Business law

Opia is a real estate agent. Kakaiku owns a house which he decides to sell. Although kakaiku has not appointed opia his agent, kakaiku sells the house to a third party introduced by opia. Opia claims his commission from kakaiku. Advice kakaiku and opia as

138. ## optical density of safety googles

Optical density (0.0.) is defined as the logarithm (power of ten) of the attenuation of light transmitted through protective eye wear at a particular wavelength. For example, if glasses attenuate light at 1,064 nm. to 1 / 100,000 of its original intensity,

139. ## Math

Carol had a pizza party for her friends. She ordered 5 different kinds of pizza. After the party was over, she noticed how much each pizza she had left. Carol's Leftover Pizza cheese 1/4 Pepperoni 4/8 Sausage 4/12 Veggie 1/3 Supreme 3/4 Which type of pizza

140. ## Math

The length of a rectangle in 18 inches. What is the perimeter of the rectangle if the length is 7 incheslonger than the width?

141. ## math

If 37 out of 41 people get something right. What percent is that and how do you get the answer? Thank you.

142. ## science math practice

a 60.0-kg person walks from the ground to the roof of a 74.8-m-tall building. how much gravitational potential energy does she have at the top of the building?

143. ## Business law

CkB is the director of television of SKC Limited, a broadcasting company. The new managing director of the company expressly forbade CKB from entering into any contracts for broadcasting rights. CKB however bought rights from OSMI Limited for the

144. ## ALGERBRA

Patricia owned so many posters that she decided to sell 63 of them to her friends. After selling the posters, she still had 172 left. Write and solve an equation to find the number of posters p Patricia had originally

145. ## Physic

A ball is projected vertically up word from the top of tower 60m ,hight with velocity 30m ,what is the mex heigh above the ground leve? How long it take to reach the ground

146. ## chemistry

for each of the following equations,calculate the mass of each product formed if 25.0g of the reaction listed first reacts completely with the second.a. 2AgNO3+CaS04=Ag2S04+Ca(No3)2. b. 2AL+GHNO3=2AL(NO3)3+3H2.

147. ## Math

Becky found \$2.00 in her back pocket when she got dressed this morning. She went to the grocery store with her mom and bought a large bag of Skittles. When she got home, she sorted them by color. The chart below shows how many of each color she had. Red 20

148. ## science math practice

a pitcher throws a 0.145-kg baseball at a velocity of 30.0 m/s. how much kinetic energy does the ball have?

149. ## science math practice

a pitcher throws a 0.145-kg baseball at a velocity of 30.0 m/s. how much kinetic energy does the ball have?

150. ## ymous

You're standing 14 feet from the edge of a cylindrical water tank and is 26 feet from the point of tangency. the tank is 10 feet tall. what is the volume in cubic feet

151. ## Math

Dear Reader, Can you help me with my math problem on my homework please? There is nobody at my house who can help me yet. So when you get the chance can you help me with my problem? Thanks for reading. From, Portia1214

152. ## Physis

A bullet of mass of 30g and travelling at a speed of 200msˉ¹ embeds itself in a wooden block. The bullet penetrates a distance of 12cm into the wood. Using the concepts of work done by a force and kinetic energy, determine the average resistive force

153. ## business math

a 4 foot post that is 8 feet from a flag pole is casting a shadow whose length is 5 feet? write a proportion that can be used to approximate the height H, of the flag pole in feet. solve the proportion to determine the approximate value of H,in feet?

154. ## english

Identify the subjects of the following sentences. Jacob's favorite poker game is Texas Hold'em

155. ## Math

24 sandwiches come on one large tray and you order 27 trays for a party and 527 people come over can each person eat more than 1? Explain.

156. ## History

Both Meriwether Lewis and William Clark hailed from what state?

157. ## geometry

A triangle is inscribed in a circle. One side of the triagle has lenghth 12 cm, and the angle opposite that side measures 30 degrees. What is the diameter of the circle?

158. ## physics

A satellite is in circular orbit above the Earth at an altitude of 2000 km. What is the orbital speed of the satellite? what is the equation i need to use

159. ## Geometry

A certain type of tile costs \$50 per square meter. If the actual tiles are square tiles with sides 20 cm, How much does one tile cost?

160. ## math

Three paintings are shapedlike an8 foot square a 7foot by 4foot rectangle,and a trianglewith a 6-footbase anda height of 7feet. If thosepaintings are hung together on the outside of a building,how much of the building's wall will they cover altogether?

161. ## Social Studies

Point of view on slavery in the North and South North: The North didn't want slavery because they thought it was wrong to treat people different from others. What should I put for South?

162. ## statistics

A random sample of 31 people employed by the Florida state authority established they earned an average wage (including benefits) of \$56 per hour. The sample standard deviation was \$6.35 per hour. Develop a 99 percent confidence interval for the population

163. ## biology

If short hair (L) is dominant to long hair (l), then to determine the genotype of a short-haired animal it should be crossed with Answer a. Ll b. ll c. LL d. All of the above. e. None of the above.

164. ## Math:Ratios

The Ratios for students who have a computer to those who do not are 22;8 while the ratio for the ratio of students who have a cell phone to those who do not is 12;18. Which is greater?

165. ## English

Thank you, Writeacher. Can you please have a look at the following sentences? 1) I think in American English you can say: She said she was leaving the hotel the day after (instead of the following day). 2) He said he had lost his keys the night before. 3)

166. ## spelling

sentence using word burden and what does it mean? sentence using word narrate , what does it mean? and sentence using word mentor and what does it mean?

167. ## statistics

A random sample of 31 people employed by the Florida state authority established they earned an average wage (including benefits) of \$56 per hour. The sample standard deviation was \$6.35 per hour. (a)What is your best estimate of the population mean?

168. ## Math

f (x) = x^2, [4, 5] If the Mean Value Theorem can be applied, find all values of c in the open interval (a, b) such that f '(c) = f (b) − f (a)/b − a answers as a comma-separated list.

169. ## math

if a product is charged at \$6.25 per 5 pounds how much will be charged for 12.5 pounds after a 8% discount

170. ## lasers

During laparoscopic laser surgery, the proper insufflating medium is CO2 gas, and the pressure of the insufflator should not be set higher than 15 torr? correct or wrong?

171. ## Math

Alberto figures that the probability of his hockey team winning on saturday is 65%. Alvin figures that the probability of his basketball team winning on saturday is 70%. Assume that the events are independent and that the boys estimates of the probability

172. ## kinetics

A car is travelling on a banked circular racetrack, Given that the track is banked at an angle of 16degree to the horizontal and the radius of the track is 50 metres and there are no friction forces present a) draw a free body diagram of the car

173. ## kinetics

An exercise bicycle's flywheel is 30cm in diameter and 2.5 cm thick and is constructed from steel (density=7850 kg m3) its moment of inertia is 0.156 kg m2 about its axis of rotation a) calculate the mass of the flywheel b) calculate the flywheel's radius

174. ## statistics

The time required by workers to complete an assembly job has a mean of 50 minutes and a standard deviation of 8 minutes. To spot check the workers' progress on a particular day, their supervisor intends to record the times 60 workers take to complete one

175. ## kinetics

a stationary car is hit from behind by another car travelling at 40km per hr. After collision both cars remain locked together. The masses of the stationary car and the moving car are 1500kg and 1300kg respectively (use g=9.8ms-2) a) is this an elastic or

176. ## Chemistry

Calculate the equivalent mass of each of the following acids. a) HC2H3O2 b) KHCO3 c) H2SO3

177. ## language arts

I'm writing a letter in the perspective of an Italian immigrant. I have to include a funny/horrible story about living in a tenement. Would you happen to know of a website that may help? Or do you have a story you could share? Thanks!

178. ## kinetics

a ball of mass 200 g is thrown vertically upwards with a velocity of 20ms-1 ignoring air resistance. a) calculate the kinetic energy of the ball as it is released b)calculate the maximum height reached by the ball c) state the velocity of the ball when it

179. ## Chemistry

Complete and balance the following equations NaHCO3(s)+H+(aq)---> CaO(s)+C(s)---> C(s)+H2O(g)---> CuO(s)+CO(g)---> If possible include charges and physical state.

180. ## AP CHEMISTRY

Calculate the equivalent mass of each of the following acids. a) HC2H3O2 b) KHCO3 c) H2SO3

181. ## math

a cat toy costs 5 dollars.how many 5 dollars cat toys can a person by with 3,000,000?

182. ## math

HELP!!!! the input is 1 the output is 4 the input is 2 and the output is 7 the input is 3 and the output is 10 the input is 4 and the out put is 13 what is the rule????

183. ## alg2trig

16log4^1/64=x

184. ## writing

what are the adverbs in these sentences? 1. stephanie rushed forward to the finish line. 2.mira is practicing the long jump 3.we have looked everywhere for a new stopatch 4.ellis will never run there 5.dont stop now 6.sometimes i also run hurdless 7.we

185. ## writing

what are the adverbs in the sentences & what word does it modify? 1.it rained quite often during the month of outdoor performances 2.the play seemed somewhat long 3.joyce is often absent from practice

186. ## AP CHEMISTRY

1) Calculate the molarity of a solution of sodium hydroxide, NaOH,if 23.64 mL of this solution is needed to neutralize 0.5632g of potassium hydrogen phthalate. 2) It is found that 24.68 mL of 0.1165M NaOH is needed to titrate 0.2931 g of an unknown acid to

187. ## Science

I need help with a poster for radon and i need some ideas i cant think of anything. If u can can somebody help me. It's due by March 12, 2012. And plzz if can u give me some ideas. Thx. =)

188. ## math

A customer uses a \$20 bill at a self check-out register to pay for products totaling \$14.50. The customer is concerned they did not receive the proper change. How much money should they have received back from the automated register?

asked by black guh
189. ## math

a bag contains 6 white 2 black and 10 green marbles if a marble is selected at random find the probability that it is green

190. ## physics

Find the change in the gravitational force between two planets if the masses of both planets are doubled but the distance between them stays the same. Express your answer as an integer.

191. ## AP CHEMISTRY

SOMEONE PLEASEEEEEEEEE ANSWER MY PROBLEM IN THE POST BELOW!!!!!!!!!!!!!!!!!!!!!!!!!!!

192. ## AP Chemistry

Calculate the pH of each of the following buffered solutions: a. 0.10M C2H5NH2/0.25M C2H5NH3Cl b. 0.25M C2H5NH2/0.50M C2H5NH3Cl c. 0.50M C2H5NH2/0.50M C2H5NH3Cl

193. ## 3 grade english ms sue

vowels: r-controlled riddle read a clud and write the list word. when you have written all seven word, the answer will appear in the boxes. THIRD,EARLY, WORLD, CERTAIN, DIRTY, HERSELF, EARTH, WORD, PERFECT, VERB, NERVE, WORM, THIRSTY, WORKOUT, EARN what

194. ## Chemistry

Given the data below, calculate the total heat (in J) needed to convert 20.0 g of liquid ethanol (C2H5OH) at 40.0 oC to gaseous ethanol at 125 oC. A. 3.23 x 103 B. 3.67 x 103 C. 4.17 x 103 D. 2.08x104 E. 2.12 x 104

195. ## American Literature

Would you describe Langston Hughes’s poetry as modernist in its themes, use of images, and style? Refer to specific examples from Hughes’s poetry to support your answer.

196. ## space

If someone observes the moon for 60 days what days will their be a full moon?

197. ## physics

Calculate the force of gravity between a newborn baby of mass 2.9 kg and the obstetrician of mass 100 kg, who is 0.58 m from the baby.

198. ## tax

Under a court-ordered decree of separate maintenance executed in 2011, Rebecca is required to pay her ex-husband, Carl, \$5,000 a month until their youngest son turns age 18. At that time, the required payments are reduced to \$2,500 per month. How much of

199. ## language arts

I forget, in the heading of a friendly letter, do you write your address or to whom you are writing's address?

200. ## Math

Becky found \$2.00 in her back pocket when she got dressed this morning. She went to the grocery store with her mom and bought a large bag of Skittles. When she got home, she sorted them by color. The chart below shows how many of each color she had. Red 20

201. ## science

to begin a dive, a diver jumps into the air and then lands on the diving board, causing it to bend. what type of energy conversions occur as the board springs back & propels the diver up into the air?

202. ## chemistry

1. What happened to the hydrogen gas generated in the last reaction? Add hydrogen gas to the cycle. 2. What happened to the aluminum? 3. Why was it important to wash the CuO? 4. What other metals can be easily recycled?

203. ## 3 grade math

dave delivered 52 newspapers in all on saturday and sunday. he delivered 8 more newspapers on sunday than on saturday.how many newspapers did dave delive on sunday? explain how you solved. 52newspapers in all saturday:? | sunday:? | 8 more than saturday my

204. ## physics

Calculate the force of gravity between a newborn baby (mass = 2.6 kg) and the planet Mars (mass = 6.4 * 10^23 kg) when Mars is at its closest to Earth (distance = 5.6* 10^10m).

205. ## science

a 0.15 kg ball is thrown into the air & rises to a height of 20.0 m. how much kinetic energy did the ball initially have? ? ?

206. ## Acid and Base Equilibrium

What would happen to a weak base dissociation equilibrium if more products were added?

207. ## chemistry

1. Heat can initiate reaction as well as be a product of chemical reactions. Cite the specific sample from the experiment that show heat acting in the manner. 2. Aluminum chloride was a product in step 6. How could you instruct your lab partner to recover

208. ## Physics

A student decides to move a box of books into her dormitory room by pulling on a rope attached to the box. She pulls with a force of 130 N at an angle of 30.0° above the horizontal. The box has a mass of 24.0 kg, and the coefficient of kinetic friction

209. ## Physics

A 3.00-kg block starts from rest at the top of a 33.5° incline and slides 2.00 m down the incline in 1.30 s. (a) Find the acceleration of the block. m/s2 (b) Find the coefficient of kinetic friction between the block and the incline. (c) Find the

210. ## Physics

A fire helicopter carries a 520-kg bucket of water at the end of a 20.0-m long cable. Flying back from a fire at a constant speed of 40.0 m/s, the cable makes an angle of 38.0° with respect to the vertical. Determine the force exerted by air resistance on

211. ## Physics

A box rests on the back of a truck. The coefficient of static friction between box and bed of the truck is 0.255. (a) When the truck accelerates forward, what force accelerates the box? A)the inertial force B)gravity C)centripetal force D)the friction

212. ## tax

For the current year, Sheila Jones had adjusted gross income of \$100,000. During the year, she contributed \$6,000 to her church and an additional \$3,000 to qualified charities. She also contributed religious artwork with a fair market value of \$60,000 and

213. ## 3 grade math

Jan, Mya, and Sara ran a total of 64 miles last week. Jan and Mya ran the same number of miles. Sara ran 8 less miles than Mya. How many miles did Sara run? 64 miles in all Jan - Mya - Sara Same as Mya - Same as Jam - 8 less my son need help in this

214. ## science

If someone observes the moon for 60 days what days will their be a full moon?

215. ## chemistry

1. Heat can initiate reaction as well as be a product of chemical reactions. Cite the specific sample from the experiment that show heat acting in the manner. (this is for recycling a copper using a copper nitrate, sodium hydroxide and HCL)

216. ## Algebra

combine like terms (simplify) 11/14a-1/15b+1/14a-11/15b

217. ## chemistry

1. What happened to the hydrogen gas generated in the last reaction? Add hydrogen gas to the cycle. 2. What happened to the aluminum? 3. Why was it important to wash the CuO? 4. What other metals can be easily recycled? we experiment for recyclying a

218. ## Geometry

Isosceles triangle ABC has vertices at A(0, 0), B(8, 0), and C(x, 12). The value of x could be

220. ## geometry

Find the y-intercept of y = 4x - 64.

221. ## Help ?

Two carts, A and B, are connected by a rope 39 ft long that passes over a pulley P (see the figure). The point Q is on the floor h = 12 ft directly beneath P and between the carts. Cart A is being pulled away from Q at a speed of 3.5 ft/s. How fast is cart

222. ## geometry

Factor 15x^2 - 8x - 16

Simplify z-4

224. ## Math

a section of a stained-glass window is shaped like a parallelogram.Its base is 6.5 inches,and its height is 4 inches.How much glass is need to cover the section completely?

225. ## Math

The 4ft by 6ft has a solid red rectangular area that covers 1/3 of the flag. What could be the dimensions of this red area?

226. ## Biology

Is Carbon (in soil) bad for plants?

227. ## AP CHEMISTRY

The following acid-base indicators are available to follow the titration. Which of them would be most appropriate for signaling the endpoint of the titration? EXPLAIN ------- COLOR CHANGE ------ INDICATOR Acid form Base Form pH Transition Interval

228. ## college math

14/7 divided by 4/10 reduced to lowest terms

229. ## Biology

i asking question for my sister again how r gene combina tions reshufled? my sister and i find this paragraph online but we not able to get answer. Sex can introduce new gene combinations into a population and is an important source of genetic variation.

230. ## English Literature

Can anyone explain how expatriate Americans and native Europeans viewed America after WWI.

231. ## Chemistry / Gas Law

350.0 mg of an unknown gas effuses through a small hole into a 2.00 L flask. It effuses at a rate 1.27 times faster than sulfur dioxide at the same temperature, 20.0 degree C. What pressure would it exert in the 2.00 L flask?

232. ## Chemistry

Ammonium iodide dissociates reversibly to ammonia and hydrogen iodide. NH4I(s) NH3(g) + HI(g) At 400°C, Kp = 0.215. Calculate the partial pressure of ammonia at equilibrium when a sufficient quantity of ammonium iodide is heated to 400°C. Please help!

233. ## Math

Sarah drove 30 miles with an average speed of 40mph. How long was she driving for?

234. ## math

On this question:She then ate half of the remaining Skittles and saved the rest. What fraction of the bag of Skittles did she save? Simplify the fraction,if possible Did I have to simplify 25/80 to get 5/16? If I did where was I suppose to get 25/80 from

235. ## college math

find the lest common denominatorfor 1/225 plus 4/50 and add the fractions

236. ## Biology

What is the difference between Curing, Composting and Fermentation?

237. ## college math

find the lest common denimator and add the fractions 1/125 plus 4/50

238. ## Math

88 44 64 32 52 ___ ____ Can someone help me figure out the pattern?

239. ## chem1151

If 2.68 grams of Copper was recovered and you started with 8.94 grams of Copper(II)chloride,then what is the percent yield of the reaction?

240. ## Account

For the current year, Sheila Jones had adjusted gross income of \$100,000. During the year, she contributed \$6,000 to her church and an additional \$3,000 to qualified charities. She also contributed religious artwork with a fair market value of \$60,000 and

241. ## Math

Simplify (x^1y^1)^5

242. ## physics

Calculate the force of gravity between Earth and the Sun (the Sun's mass = 2.0×10^30 kg; average Earth-Sun distance = 1.5×10^11 m).

243. ## AP CHEMISTRY

The following acid-base indicators are available to follow the titration. Which of them would be most appropriate for signaling the endpoint of the titration? EXPLAIN ------- COLOR CHANGE ------ INDICATOR Acid form Base Form pH Transition Interval

If one started will 4.33g of copper(11) chloride , how may grams of copper could be produced?

245. ## 4th grade

mark knows his yard is 2 1/4 times as long as the width

246. ## math

enrollment at a college has 8500 students enrolled, there aer 1/3students over 25 as there are under 25. how mant are over 25 how many are under 25

247. ## physics

Calculate the force of gravity between a newborn baby (mass = 2.6 kg) and the planet Mars (mass = 6.4 * 10^23kg) when Mars is at its closest to Earth (distance = 5.6 * 10^10m).

248. ## 7th grade health

true or false if false what is the real word MOOD DISORDER are a variety of psychological conditions that affect a person's ability to get along with others. Please help. thank you

249. ## Biology

for my sister again. what be 2 examples of short wave radiation that can trigger mutation. she only found uv radiation.

250. ## Math

What is the solution of -6r-5=7-12r?

251. ## Math

(5x10^2)x(5.6x10^4)

252. ## Calculus

Find a power series, centered @ x=0, for function f(x)=x/(1+2x). I know this is a maclaurin series, but my work doesn't get the right answer. Can you please show steps? Also,do all power series start with a 1, as in (1+2x+4x^2+...)? Thanks in advance!

253. ## Poetry

What does riprap symbolize in Gary Snyder’s poem, “Riprap”? A.the barriers of friendship B.the needless walls we build around ourselves C.the journey and the workmanship of the trail of life D.the things we bother ourselves with in life I think the

254. ## Calculus

Which of the following is the maximum value of the function f(x)=2sinxcosx? a) 0 b) 1 c) 2 d) No maximum value

255. ## Physics

A bus started out going 20 miles per hour on the highway. One hour later it drove 40 miles per hour on the freeway. How long did it take to go 140 miles?

256. ## AP CHEMISTRY

Write the formula for the following compound, being sure to use brackets to indicate the coordination sphere. A) potassium tetrabromo(ortho-phenanthroline)- cobaltate(III)

257. ## chemistry

what is the molarity of a HCl solution that contains 13.0 g of HCl in 125 mL of solution? Answer in units of M

258. ## AP CHEMISTRY

i asked another question in my post below pleaseeeeeeeee answer it.. THANX!!!!!!!

259. ## math

the package space on a truck is 5 meters long, 3 eters wide, and 2 meters tall. what is the volume of the space

260. ## math

The lawn sprinkler can be adjusted so that the water stream is from 25 to 40 feet. What is the diameter of the largest circle area that this sprinkler will cover.....please help

261. ## Functions/Logarithims

Energy is needed to transport a substance from outside a living cell to inside the cell. This energy is measured in kilo calories per gram molecule, and is given by E = 1.4 log (C1) / (C2 where C1 represents the concentration of the substance outside the

262. ## math

If 1 meter=39.25 inches, how many inches are in a hectometer

263. ## chemistry

what is the molarity of a HCl solution that contains 13.0 g of HCl in 125 mL of solution? Answer in units of M is it 3791.944 ?

264. ## Math

0.0003556 in scientific notation

265. ## college math

I am not understading the concept of this problem pleaase help. 5/22divided by 1/41 reduced to the lowest terms

266. ## chemistry!

The standard molar heat of vaporization for water is 40.79 kJ/mol. How much energy would be required to vaporize 4.00 mol of water? Answer in units of kJ

267. ## Mathematics

An invoice is dated January 24 with terms 2/10 – 20x. Find the final discount date and the net payment date. The net payment date is 20 days after the final discount date. The final discount date is 2/23. The net payment date is 3/?.

268. ## CALCULUS

Find d/dx of the antiderivative from x^4 to 5 of the (9-t^2)^1/2

269. ## Academic sources

Hi, I was wondering if using an online blog that was written by a person with a Ph.D. right next to their name is an academic and scholarly source for research.

asked by Alex L.
270. ## chemistry

Before a trip from New York to Boston, the pressure in an automobile tire is 2.5 atm at 272 K. At the end of the trip, the pressure gauge reads 1.94 atm. What is the new Celsius temperature of the air inside the tire? (Assume tires with constant volume.)

271. ## AP CHEMISTRY

one last question DrBob222 U wrote: I did not guess. You said a weak acid and NaOH so I picked acetic acid (which I will call HAc) with NaOH. I used 0.1M HAc and titrated with 0.1M NaOH. At the equivalence point we will have 0.05M NaAc which is hydrolyzed

272. ## Math

if 5 times a number is increased by 5 the result is 30. find the number

273. ## physics

At a playground, a 19.8 kg child plays on a slide that drops through a height of 2.13 m. The child starts at rest at the top of the slide. On the way down, the slide does a nonconservative work of -319 J on the child. What is the child's speed at the

274. ## physics

At a playground, a 19.8 kg child plays on a slide that drops through a height of 2.13 m. The child starts at rest at the top of the slide. On the way down, the slide does a nonconservative work of -319 J on the child. What is the child's speed at the

275. ## Physics

A box of mass 250 kg slides 4.6 m down an inclined plane of 31°. Jim pushes against the box to keep it from accelerating. The coefficient of kinetic friction between the box and the ramp is 0.41 (a) Calculate the magnitude of the force exerted by Jim. (b)

276. ## Physics

You are in a space shuttle traveling in the circular orbit, which is 380 km above the Earth. Your friend is in another space shuttle traveling on the same circular orbit with you, but he is 20 km ahead of you. (a) How long will it take you to catch up with

277. ## Physics

In the figure, two balls are located in deep space. The black ball has mass 56kg and the red ball has mass 17kg. The distance between the two balls is r=24cm. (a) Find the magnitude of the acceleration of the red ball. m/s2 (b) If r is 5 times larger, with

278. ## chemistry

Analyze the properties of a sodium atom and a sodium ion. What are the differences in mass, stability, and reactivity that are caused due to the differences between the sodium atom and sodium ion?

279. ## math

Red 20 orange 20 yellow 17 green 13 purple 10 Of the Skittles Becky saved, she kept all of the green and 1/2 of the orange. What fraction of the yellow Skittles did she eat?

280. ## math

Semiannually deposits of \$400 are made for 10 years into an annuity that pays 7% compounded semiannually

281. ## physics

If you slosh the water in a bathtub at the correct frequency, the water rises first at one end and then at the other. Suppose you can make a standing wave in a 145 cm long tub with a frequency of 0.31 Hz. What is the velocity of the water wave?

282. ## Chemistry

Write the Gross and Net Ionic Equations for the following Reactions: LiNO3(aq)+(NH4)3N(aq) => Li3N(s)+ NH4NO3(aq) Al(s)+CuCl2(aq) => AlCl3(aq)+Cu(s)

283. ## Science

How is geotropism/gravitropism related to roots and shoots?

284. ## Math

Lily and Tina went to dinner. When the bill came, Lily discovered that she had only \$6. Luckily, Tina had enough money to pay the rest or 3/5 of the bill. How much did Tina pay? How much was the total bill?

285. ## Math

The length of a rectangle is 10cm greater than the width. The area is 551cm^2. Find the length and width

286. ## Calculus

Find a power series, centered @ x=0, for function f(x)=x/(1+2x). I know this is a maclaurin series, but my work doesn't get the right answer. Can you please show steps? Also,do all power series start with a 1, as in (1+2x+4x^2+...)? Thanks in advance!

287. ## math

plz help with equation 5x-9y=11=3x+7y=19

288. ## algebra

5x-9y=113x+7y=19.......plz help serious..........

289. ## Chemistry

Zinc and sulfur react to form zinc sulfide according to the equation Zn+S=>ZnS a) How many grams of ZnS will be formed? b) How many grams of the excess reactant will remain after the reaction is over?

290. ## math

what is rule for a function table that has input/output 12/0 20/2 32/5 52/10

291. ## math

when c = 4, what is the value of the expression 72 / c? ...Explain how you could show five less than a number using an expression.

292. ## math

Need to make a problem, using parentheses and use as many operations to write an expression equal to to th target number. You can only use each number once in an expression. Numbers 6,7,12,14,20 Target number = 41

293. ## physics

A 9 V battery is connected in series with a 100 Ω resistor and 12µF capacitor. The capacitor is initially uncharged. What is the capacitive time constant of the circuit? How much charge q(t) is in the capacitor after two time constants?. What is the

294. ## Math

Ted is making three picture frames like the one shown below. What length of wood does Ted need for all three picture frames? a) 11 1/2in, b) 15 3/4in, c) 27 1/4, d) 81 3/4 in.

295. ## math

40% of the 25 students in the class are boys. Write 40% as a fraction? Then find the ratio of girls to boys

296. ## Math

Janet has a circular garden in her front yard with a diameter of 8 feet. How does the diameter d compare to the circumference C of the garden? F) D = 1/3C G) D = 1/2C H) D = 2C I) D = 3C

297. ## Biology

Help please! Do organic fertilizer products (in bags or sacks) decay after some time? If yes, how long will it take to decay?

298. ## Math

How long did it take the trip if Jay drove 340 kilometers at the average rate of 68 kilometers per hour?

ln [5.01E-3] = ln(4.86E-2) - (1.80E-2s-1)(t s) Solve for t. t = 126 s First I did 4.86e-2 - 1.80e-2 and then on my calculator I pressed the 2nd button and then ln and got 1.031. Then I did the same thing to get the ln of 5.01e-3 and divided that by 1.031

300. ## Math(Please answer just a quick question!!!!)

If the time elapsed is 4.26 min, what is the value of the rate constant, k? ln[R]t / [R]o = -0.0237 I am not sure how to slove this. Would I do ln 4.26 minutes times -0.0237???

301. ## Algebra

y=x^2-3x-10, Find the y-intercept and any x-intercept

302. ## Calculus

The graph of the curve y2=10 x+10 is a parabola, symmetric with respect to the x-axis. Find the area of the surface generated by rotating about the x-axis the part of this curve corresponding to 0 ≤ x ≤ 20.

303. ## Math

x^2+1/4x+_?__

304. ## math

Suppose that a

305. ## Math

Ted is making three picture frames like the one shown below. What length of wood does Ted need for all three picture frames? a) 11 1/2in, b) 15 3/4in, c) 27 1/4, d) 81 3/4 in. The length is 7 7/8 in., and width is 5 3/4in.

306. ## Math

x^2+bx+45, Find the value for b such that the trinomial is a square

307. ## calc2

Let R denote the region in the plane consisting of all points (x,y) where x ≥ 1 and 0 ≤ y ≤ 2/x. Let S denote the solid formed by rotating R about the x-axis. Observe that S is an unbounded region; that is, it extends indefinitely in the direction of

308. ## math

Find the points where these conics intercept: 16x^2 - 5y^2 = 64 16x^2 + 25y^2 - 96x = 256

309. ## Math

Transform the equation by completing the square: y^2 + 2x - 6y - 7 = 0

310. ## Chemistry

Which of the following reactions are spontaneous (favorable)? A] 2Mg(s) + O2(g) -> 2MgO(s) Delta G = -1137 kJ/mol .. B] NH3(g) + HCl(g) -> NH4Cl(s) Delta G = -91.1 kJ/mol ... C] AgCl(s) -> Ag+(aq) + Cl-(aq) Delta G = 55.6 kJ/mol .. D] 2H2(g) + O2(g) ->

311. ## CHEMISTRY

If 4.00 g of metal is plated in the voltaic cell (which contains Ag and Ni with the total potential of 2.98 V) , how much metal is plated in the electrolytic cell (contains Ag and Zn with the total of 1.98 V)?

312. ## chemistry

A solution of NaOH with pH 13.68 requires 35.00 mL of 0.128 M HClO_4_ to reach the equivalence point. What is the volume of the NaOH solution?

313. ## Chemistry

Under standard conditions (298 K and 1 atm), which statement is true? a] diamond converts to graphite spontaneously b] graphite converts to diamond spontaneously c] none of the above How can the spontaneity of the reaction be reversed? a] increase the

314. ## math

Whatis262.4%asafraction

315. ## Business Law

As company ombudsman, your task is to investigate complaints of wrongdoing on the part of corporate directors and officers, decide whether there is a violation of the law, and deal with the wrongdoers accordingly, Jane, a shareholder of Goodly Corporation,

316. ## calculus

Integral from pi/6 to pi/4 of 2sin(2x)cos(2x)dx=

317. ## Math Help Please

Would you please explain the steps you used to get the answer 2469. Thank you Using the 9 digits, 1, 2, 3, 4, 5, 6,7, 8 and 9 you can arrange four different digits to form a four-digit number that is NOT divisible by 7. The digits 1238 cannot be arranged

asked by TO: Steve
318. ## trig

what is the exact value of cos(x+y) if tan=x sqare root 3 over 3 and sin y=square root 2 over 2?

319. ## Chemistry

When MoO3 and Zn are heated together they react 3Zn(s)+2MoO3(s) --> Mo2O3(s)+3ZnO(s) What mass of ZnO is formed when 20.0 grams of MoO3 is reacted with 10.0 grams of Zn?

320. ## physics

A person can jump a horizontal distance of 2.59 m on the Earth. The acceleration of gravity is 11.8 m/s2 . How far could he jump on the Moon, where the free-fall acceleration is 0.297g? Answer in units of m

321. ## geometry

Rain water from the flatt roof of a building 20 m by 5 m flows into a cylindrical tank of diameter 2 m. Find the increase in depth of water in the tank after 11 mm of rain. Give your answer in meters. Vcyulinder= Πr2h. Use Π≈(22/7).

322. ## Chemistry

Is it even possible to guess the signs of Delta H, S, and G from only knowing the following information?: - Silica gel is a solid. - Chemically inert. - Highly porous. - Amorphous form of SiO2. - Water vapor is absorbed onto the surface of silica gel and

323. ## geometry

ok, so you have a special right triangle that is a 30 60 90, the side measures are y, 2y and y radical 3. in place of those, y=25 2y=c and y radical 3 i figured out to be 25 rad 3 divided by 3 this is substituted by letter d. find c. would it be 50?

324. ## geometry

ok, so you have a special right triangle that is a 30 60 90, the side measures are y, 2y and y radical 3. in place of those, y=25 2y=c and y radical 3 i figured out to be 25 rad 3 divided by 3 this is substituted by letter d. find c. would it be 50?

325. ## chemistry

How do I write these compounds in their "true form" or Ionic State? NaCl, CuSO4, NH4OH How do i find the charges?

326. ## Chemistry

How do you get the pH 13.68 into OH^-^?

327. ## Chemistry

I need help with Stoichiometry Mapping and solving using the "line bar" method Cl2P4(s)+6Cl2(g) --> 4PCl3(g) How many mL of PCl3 can be produced by the reaction of so g of Cl2(g)

328. ## algebra

factor completely 4s^2-25

329. ## geometry

A conical scoop is used to remove coffee from the can an place it into a coffee maker. the scoop has a 1 inch diameter and a 2 inch height. if one level scoop is used to make each cup of coffee, how many cups of coffee can be made from a full 2-pound can

330. ## Math

Received answer to the following question from Jishka. (2469) Would you please explain the steps you used to get the answer 2469. I must show work. Thank you Using the 9 digits, 1, 2, 3, 4, 5, 6,7, 8 and 9 you can arrange four different digits to form a