# Questions Asked onNovember 30, 2009

1. ## Physics

In a hydroelectric dam, water falls 26.0 m and then spins a turbine to generate electricity. What is ∆U of 1.0 kg of water? Suppose the dam is 80% efficient at converting the water's potential energy to electrical energy. How many kilograms of water must

2. ## Calc

The rate (in mg carbon/m3/h) at which photosynthesis takes place for a species of phytoplankton is modeled by the function below, where I is the light intensity (measured in thousands of foot-candles). P = (120 I) / (I^2 + I + 1) For what light intensity

3. ## Chemistry

Sodium Chloride is the LEAST soluble in which of the following liquids? a. H2O b. CCl4 c. HF d. CH3OH e. CH3OOH I know NaCl is a polar molecule...and a dipole-dipole IMF bond? My guess is b because it's nonpolar and I think it's a London Dispersion IMF. Is

4. ## MATH

Jones Company had 100 units in beginning inventory at a total cost of \$10,000.The company purchased 200 units at a total cost of \$26,000. At the end of the year, Jones had 80 units in ending inventory. Compute the cost of the ending inventory and the cost

At one table, some of the students shared 3 pizzas. Each pizza was cut into 8 slices. After the students shared the pizza equally, there were 3 slices left over. How many students shared the pizza? How many slices of pizza did each student eat?

6. ## Statistics

A car manufacturer is interested in conducting a study to estimate the mean stopping distance for a new type of brakes when used in a car that is traveling at 60 miles per hour. These new brakes will be installed on cars of the same model and the stopping

7. ## physics

Water flows steadily from an open tank into a pipe. The elevation of the top of the tank is 10.2 m, and the elevation at the pipe is 3.90 m. The initial cross-sectional area of the pipe is 6.40×10^−2 m; and at where the water is discharged from the

8. ## Physics

A 120 g ball moving to the right at 4.2 m/s catches up and collides with a 450 g ball that is moving to the right at 1.2 m/s. If the collision is perfectly elastic, what are the speed and direction of each ball after the collision?

9. ## Org. Chem.

We did an experiment with the synthesis of n-butyl bromide, using n-butyl alcohol, NaBr, and H2SO4. The question is: Aqueous sodium bicarbonate was used to wash the crude n-butyl bromide. A) What was the purpose of this wash? Give Equations. I know it was

10. ## physics

Two air-track carts are sliding to the right at 1.0 m/s and held together by a string. The spring between them has a spring constant of 140 N/m and is compressed 4.5 cm. The carts slide past a flame that burns through the string holding them together.

Site #3: What in the World - Mystery Photos (from National Geographic) Try at least four different challenges in the “What in the World” category and record your results in the chart. You will need to fill in the chart with the title of the game and

12. ## space/astronomy

Rank the objects based on the strength of the gravitational force that would be felt by a spacecraft traveling at a distance of 10 AU from the center of each of the objects, from weakest to strongest. 1)red giant mass: 1Msun radius: 100Rsun 2)sun 3)white

13. ## Calc

An oil refinery is located on the north bank of a straight river that is 2 km wide. A pipeline is to be constructed from the refinery to storage tanks located on the south bank of the river 3 km east of the refinery. The cost of laying pipe is \$300,000 per

14. ## physics

A lobsterman's buoy is a solid wooden cylinder of radius r and mass M. It is weighted on one end so that it floats upright in calm sea water, having density . A passing shark tugs on the slack rope mooring the buoy to a lobster trap, pulling the buoy

15. ## Physics

A 0.15 kg baseball is thrown towards a batter with a velocity of 40 m/s. The batter hits the ball and returns it directly back with a velocity of 60 m/s. What is the change in momentum of the ball?

16. ## physics

One end of a light spring with force constant 300 N/m is attached to a vertical wall. A light string is tied to the other end of the horizontal spring. The string changes from horizontal to vertical as it passes over a solid pulley of diameter 6.00 cm. The

17. ## Org. Chem.

We did an experiment on the synthesis of n-butyl bromide using n-butyl alcohol and H2SO4. Why does the alkyl halide layer switch from the top layer to the bottom layer at the point where water is used to extract the organic layer? Please Help.

18. ## Physics

A 60-cm-long, 500 g bar rotates in a horizontal plane on an axle that passes through the center of the bar. Compressed air is fed in through the axle, passes through a small hole down the length of the bar, and escapes as air jets from holes at the ends of

19. ## Language Arts

I writing a topic sentence for a paragraph about "Annabel Lee" by Edgar Allen Poe, and I need to include imagery in it. Can you help me?

20. ## physics

The New River Gorge bridge in West Virginia is a 518 m long steel arch. How much will its length change between temperature extremes -19°C and 39°C? (answer in cm)

21. ## Fundamentals of Electricity

The box-like Gaussian surface of Fig. 1 encloses a net charge of +24.0ε0 C and lies in an electric field given by N/C, with x and z in meters and b a constant. The bottom face is in the xz plane; the top face is in the horizontal plane passing through y2

22. ## physics

The mass of a carbon atom is 2 x 10 ^ -26. What is the kinetic energy of a carbon atom moving with a speed of 500 m/s? I got 2.5 x 10^-21 which is correct. The second question states: Two carbon atoms are joined by a spring-like carbon-carbon bond. The

23. ## physics

A spherical steel ball bearing has a diameter of 2.540 cm at 23°C. (a) What is the diameter when its temperature is raised to 106°C? (b) What temperature change is required to increase its volume by 0.8%?

24. ## Physics

A bicycle is turned upside down while its owner repairs a flat tire. A friend spins the other wheel and observes that drops of water fly off tangentially from point A. She measures the heights reached by drops moving vertically (see figure). A drop that

25. ## Calculus

Can anyone help me with these two optimization problems? A boat leaves a dock at 9:00 P.M. and travels due south at a speed of 20 km/h. Another boat has been heading due east at 15 km/h and reaches the same dock at 10:00 P.M. How many minutes after 9:00

26. ## trig

(sec(x) / (sec(x)-1)) - (sec(x) / (sex(x)+1)) = 2cot(x)csc(x)

27. ## Physics

Standing waves are set up on two strings fixed at each end, as shown in the drawing. The two strings have the same tension and mass per unit length, but they differ in length by 0.55 cm. The waves on the shorter string propagate with a speed of 41.8 m/s,

28. ## Math

Write an equation in standard form for the line whose slope is undefined that passes through (5,-3) Please help me solve, my answer is 5x-3y=0... It was marked wrong and i can not seem to figure it out.

29. ## physics

What is the pressure change in water going from a 3.0- cm-diameter pipe to a 1.8- cm-diameter pipe if the velocity in the smaller pipe is 3.0 m/s? Im using the equation pv2^2(A2^2-A1^2)/2A1^2 and get (1000)(3)^2(1.8^2-3^20/(2(3)^2) and get -2880 Pa but I'm

30. ## History

Compare the different diplomacy styles of Presidents Roosevelt, Taft, and Wilson.

31. ## physics

find the length of a pendulum that oscillates with a frequency of 1.0 Hz

32. ## Physics

A string has a linear density of 6.7 x 10-3 kg/m and is under a tension of 210 N. The string is 1.6 m long, is fixed at both ends, and is vibrating in the standing wave pattern shown in the drawing. Determine the (a) speed, (b) wavelength, and (c)

33. ## physcs

A string is wrapped around a uniform solid cylinder of radius 3.10 cm, as shown in the figure. The cylinder can rotate freely about its axis. The loose end of the string is attached to a block. The block has mass 16.3 kg, and the cylinder has mass 11.2 kg.

34. ## Chemistry

Exothermic reactions are favored because they release heat to the environment. Would an exothermic reaction be more favored or less favored if it were carried out within a superheated chamber? I don't understand what "favored" means, so I don't understand

35. ## physics

The Mariana trench is located in the Pacific Ocean at a depth of about 11 000 m below the surface of the water. The density of seawater is 1025 kg/m3. (a) If an underwater vehicle were to explore such a depth, what force would the water exert on the

36. ## physics

A box of weight 2N accelerates down a rough plane that is inclined at an angle 30 degrees above the horizontal. The normal force acting on the box has a magnitude 1.7 N, the coefficient of kinetic friction between the box and the plane is O.30, and

37. ## Physics

The transverse standing wave on a string fixed at both ends is vibrating at its fundamental frequency of 250 Hz. What would be the fundamental frequency on a piece of the same string that is twice as long and has four times the tension?

38. ## chemistry

aluminum reacts with sulfric acid to produce aluminum sulfate and hydrogen gas. how many grams of aluminum sulfate would be form if 250 g H2SO4 completely reacted with aluminum?

39. ## Physics

A 5.50 kg cat leaps from the floor to the top of a 94.0-cm-high table. If the cat pushes against the floor for 0.220 s to accomplish this feat, what was her average power output during the pushoff period?

You need 1/2 cup of sugar to make a three-layer cake. How much sugar would you need for a one-layer cake? Can you help me...thank you

41. ## Maths

Solve the differential equation: d2y/dx2 - 2 dy/dx + y = 3sinhx The answer should be: y(x) = e^x (Ax+ B) + ( 3^8 )(2[x^2][e^x] - [e^-x] ) Can someone please show me how to work it out?

42. ## Physics

The Mariana trench is located in the Pacific Ocean at a depth of about 11 000 m below the surface of the water. The density of seawater is 1025 kg/m3. (a) If an underwater vehicle were to explore such a depth, what force would the water exert on the

43. ## Socials

What effect did the highland clearances and the Irish potato famine have on canada? Do ayou know anyone of Irish or Scottish ancestry? How and when did their family come ot canada? Pretend you are a scottish or Irish farmer who must immigrate. Write a

44. ## HCA220

I answered several question for an assignment and I need help to understand how I got it wrong. The assignment dwelt medical terms. The following three were marked wrong. Please help! Use the word bank below to build the medical word that corresponds to

45. ## algebra

A cruise ship is traveling in the Atlantic Ocean at a constant rate of 40 mi/h and is traveling 2 mi east for every 5 mi north. An oil tanker is 350 mi due north of the cruise ship and is traveling 1 mi east for every 1 mi south. a. How far is each ship

46. ## physics

On a cold winter day when the temperature is -20 degrees celsius, what is the amount of heat needed to warm internal body temp(37) the .5 L of air exchanged with each breath? Specific heat of air is 1020 J/(kg K) and that 1.0L air has a mass of 1.3g.

47. ## physic

HI!can anyone help me please, just on part b.Thank you so much. A spherical steel ball bearing has a diameter of 2.540 cm at 23°C. (a) What is the diameter when its temperature is raised to 94°C? ___ cm (b) What temperature change is required to increase

48. ## math

Write improper fraction as a mixed number or a whole number: 13/12

49. ## Social Studies

What was Jefferson's laissez-faire policy? Can you Give an example of it.

50. ## French

I have to write sentences in passé composé, using the subject and verb shown below. The first one in each group is done already showing how its supposed to be done. Can you check them to see if there correct. 1.) je/aller/en ville Je suis allée en

51. ## Physics

The transverse standing wave on a string fixed at both ends is vibrating at its fundamental frequency of 250 Hz. What would be the fundamental frequency on a piece of the same string that is twice as long and has four times the tension? I know the equation

52. ## Socials

Make an organizer with the headings Clothing, Housing, Transportation, Earning a Living, and Education. List the factors that made a person upper class, middle class, or working class in Britain during the 18th and 19th centuries. Can someone please tell

53. ## math

still don't get it.....Our class planned a holiday party for disadvantaged kids.Some of us baked cookies for the party.On the day of the party,we found we could divide the cookies into packets of two, three, four, five, or six and have just one cookie left

54. ## English

Hamlet: I need to look at the passages from Acts IV and V and assess their impact within the context of the whole play. I have already done so and it's giving me these questions using a passage. I need some help, please. :) Passage 1: " Now, whether it be

55. ## Physics

Measured along the surface of the water, a rectangular swimming pool has a length of 15.9 m. Along this length, the flat bottom of the pool slopes downward at an angle of 16.9 ° below the horizontal, from one end to the other. By how much does the

56. ## chemisty

2C2H2(g)+5O2(g)=4CO2(g)+2H2O(g) If 50.0 mols of carbon dioxide were produced, how many mols of acetylene (C2H2) were used?

57. ## algebra

Helen has 1/5 of her prorfolio in U.S. stocks, 1/8 of her porfolio in European stocks, and 1/10 of her porfolio in Japanese stocks. The remainder is invested in muicipal bonds. What fraction of her porfolio is invested in municipal bonds? What percent is

58. ## math

Our class planned a holiday party for disadvantaged kids.Some of us baked cookies for the party.On the day of the party,we found we could divide the cookies into packets of two, three, four, five, or six and have just one cookie left over in each case.If

59. ## math

there are 12 people at a party. each person shakes hands with each of th other guests. how many hadshakes will there be in all

60. ## chemistry

Calculate deltaG from deltaH and deltaS. Use the table of standard thermodynamic data. calculate deltaG at 0 degrees C for CH3CH2CH3 + 5O2 --> 3CO2 + H2O. CH3CH2CH3 + 5O2 --> 3CO2 + 4H2O I've balanced the equation so far, I know that deltaG = delatH -

Estimate the answers: a) 3 10/11 + 2 1/101 = Choose 4,5,6,or 7 b) 5 2/47 - 2 1/35 = Choose 2,3,4, or 5 c) 6 17/19 x 7 3/290 = Choose 42,49,63 or 213 I need to choose the best answer to this problems. Please help me with this. Thanks

62. ## help quick!!!

a ladder leans against a awall.The top of the ladder is 8 feet above the ground. If the botttom of the ladder is then moved 2 feet farther from the wall, the ladder will lie on the ground with its toptouching the wall. How long is the ladder?

63. ## accounting

using the equation A=L+OE how would you balance this problem: You buy acompany for \$200,000 - Assets are land \$50,000, building \$130,000, equip \$20,000. Took 70,000 from personal bank account to invest in business. Made a down payment of \$40,000 and

64. ## Algebra

The formula R= -0.75t +385 can be used to predict the world record in the 1500-m run t years after 1930. Determine (in terms of an inequality) those years for which the world record will be less than 3.7 min. Solve for t

65. ## English

1. My favorite book is " the Autobiography of Benjamin Franklin." I love is because I can learn a lot of lessons about living in the world wisely. 2. My favorite book is "the Bible." I love it because I can know the truth about how to live in the world. 3.

66. ## Final-Chemistry

I have finals coming up in a week and a half. I know I should have started studying earlier, but I just had an exam in my chem class and was focused on getting the information for that exam mastered before I started studying for the final. Now, I'm

67. ## Physics

A string has a linear density of 6.7 x 10-3 kg/m and is under a tension of 210 N. The string is 1.6 m long, is fixed at both ends, and is vibrating in the standing wave pattern shown in the drawing. Determine the (a) speed, (b) wavelength, and (c)

68. ## Algebra

Can you explain how to find the solution of 3x^2-2x+5, using the quadratic formula? I got it down to (2 +/- sq. root of -56)/6. But my book then reduces that to (2 +/- 2 times the sq. root of 14i)/6. But I think in place of the 2 and the sq. root of 14 it

The 93 nature camp students ate lunch at the lodge. They sat at an even number of tables. There were 5 students sitting at one table, and an equal number of students sitting at each of the other tables. How many students were sitting at each of the other

70. ## science

What is the label reaction of Na2O+H20->2NaOH ?

71. ## physics

The mass of a carbon atom is 2 x 10 ^ -26. What is the kinetic energy of a carbon atom moving with a speed of 500 m/s? What is the formula I would need?

72. ## Chem. To Dr. Bob from Earlier Question or anyone

Dr. Bob, earlier you gave me the equation H2SO4 + NaHCO3 -> H2O + CO2 + Na2CO3 to balance. However, the S is not in the products, so it can't be balanced.

73. ## Algebra 2

I need to know how to solve quadratic equations by factoring. Can you so a step by step explanation to this sample problem? 2 x -12x-28

74. ## French

In this assignment, answer the questions below in complete sentences, with logical responses. But I don't know some of these questions. So can you see if I did these correctly in French. **Qu'est-ce que tu as bu hier? French:J'ai eu un peu de jus d'orange

75. ## French

I have to think of things, facts, or people I know. I have to write a paragraph about them. Write at least eight sentences, four of which must be in the Passé Composé.Can you check the paragraph and see if its correct and see if i put it in Passé

76. ## math

8. In an interview of 50 math majors, 12 liked calculus and geometry 18 liked calculus but not algebra 4 liked calculus, algebra, and geometry 25 liked calculus 15 liked geometry 10 liked algebra but neither calculus nor geometry 2 liked geometry and

77. ## math-probability

The Probability that Jodi makes a basket when playing basketball is .50, Jamal’s probability is .80 and Pat’s is .75. What is the probability that all three make a basket?

78. ## Economics

It is assumed that the toothpaste market is perfectly competitive and the current price of a case of toothpaste is \$42.00. CPI has estimated its marginal cost function to bas follows: MC=.006Q. The Board would like to know how many cases of toothpaste

79. ## Algebra - word problem

A red ball and a green ball are simultaneously tossed into the air. The red ball is given an initial velocity of 96 feet per second, and its height, t seconds after it is tossed is (-16t^2 + 96t) feet. The green ball is given an initial velocity of 80 feet

80. ## us history

the president can check congress through?? a lobbying b overriding c vetoing

81. ## math

7. Classify each of the following as true or false. If false, tell why or give an example showing that it is not true. (a) For all sets A and B, A – B = B – A (b) For all sets A,   A (c) For all sets A, A  A   (d) The set {r, s, t,. . .,

What is the product of the ten one-digit numbers?

84. ## Socials

Did the industrial revolution improve conditions for women? No, the industrial revolution did not improve living conditions for women. The women had to work very hard, for long hours to receive payment. They often had to work in dangerous conditions. Even

During a hike, Sally and Dave collected 160 acorns. Sally collected 3 times as many acorns as Dave. How many acorns did Dave collect?

86. ## Physics

A 46.5-cm diameter disk rotates with a constant angular acceleration of 2.4 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this

How bright a star appears can depend on how much light the star actually emits and how far away it is. The stellar magnitude scale can be adjusted to account for distance as follows: M2-M1 = log (b1 / b2) Here, M refers to a star's absolute magnitude, that

88. ## math

Our class planned a holiday party for disadvantaged kids.Some of us baked cookies for the party.On the day of the party,we found we could divide the cookies into packets of two, three, four, five, or six and have just one cookie left over in each case.If

89. ## physics

how do you calculate the frequency of a 2.500 m long pendulum in Quito, Ecuador, where g= 9.780 m/s^2

90. ## Physics

A transverse wave on a string is described by the following equation. y(x, t) = (0.35 m) sin[(1.25 rad/m)x + (81.2 rad/s)t] Consider the element of the string at x = 0. (a) What is the time interval between the first two instants when this element has a

91. ## Math

If a shot is fired directly upward at 1200 feet per second from a ground elevation of 8oo feet above sea level, how high would it go above the ground level? Thanks, Gerry

92. ## spanish

correct verb form of leer when used as que __ ana?

93. ## math

ok i got the multiples of 7 so what do i do next ...Our class planned a holiday party for disadvantaged kids.Some of us baked cookies for the party.On the day of the party,we found we could divide the cookies into packets of two, three, four, five, or six

94. ## math

1000 divided by 75

95. ## physics Bob Pursley plz help

A satellite in a circular orbit around earth with a radius 1.019 times the mean radius of the earth is hit by an incoming meteorite. A large fragment m=60 kg is ejected in the backwards direction so that it is stationary with respect to the earth and falls

96. ## U.S history

The book of essays explaining and supporting the constitution was called?? a -The federalist Papers b-The Antifederalist c-The Spirit of Laws thank you

97. ## algebra 2

how do you solve quadratic equations by finding square roots i have no clue how to do this. I have fallen behind in my math class because my teacher is horrible. I need to learn this to understand everything in the section in the section. I beg someboody

98. ## Biology

In poultry, black color is due to a dominant factor (B). The recessive color is red (b). A red male bird is mated to a black female. They produce many offspring, half of which are black and half red. What are the genotypes of the parents?

99. ## algebra

Why does the inequality sign change when both sides are multiplied or divided by a negative number? Does this happen with equations? Why or why not? Write an inequality for your classmates to solve. In your inequality, use both the multiplication and

100. ## 12th grade AP Politics

What are some of the illegal ways to add amendments to the Constitution? Why are these ways prefered rather than the legal methods? Please help...I found the legal ways but don't know the illegal one. I have searched google but they don't have any answer.

42 students equally divided into "n" teams . write an expression for the number of students on each team.

How are biotic factors changed in an ecosystem that has flooded ?

103. ## problem solving math

In the farm pet club pet show, 44 pets are entered. There are 3 times as many dogs as cats and half as many ferrets as dogs. How many of each are there?

104. ## English (quotes)

hi! uhmm i am working on quotes right now. i have to identify who the speaker is and then state the significance of the quote to the play (shakespeare) i was just wondering if somebody could give me some points on how to write significance? thanks!

105. ## Math

How bright a star appears can depend on how much light the star actually emits and how far away it is. The stellar magnitude scale can be adjusted to account for distance as follows: M2-M1 = log (b1 / b2) Here, M refers to a star's absolute magnitude, that

106. ## last math ques!

this is the last one 45 people cashed checks at bank A on Monday. Of these 80% of these already had accounts at bank A. one-third of the people who did not already have an account opened, opened an account Monday. how many people opened an account monday?

107. ## chemistry

Why is a weaker base a better leaving group? Can someone please explain that? I understand that the more stable the leaving group is after it has left, that means the more able it was to accept an electron pair prior to leaving, but I don't understand the

108. ## Ex English

Hello, I've been given a project in School, and I'm wondering if you guys could help me pick a topic, here is the prompt. On a separate page for each letter, you will need a topic for each letter to fall under I must have atleast 2 other topic too fall

109. ## Physics Meteorite

A satellite in a circular orbit around earth with a radius 1.019 times the mean radius of the earth is hit by an incoming meteorite. A large fragment m=60 kg is ejected in the backwards direction so that it is stationary with respect to the earth and falls

110. ## French

Could you check these also thanks: Directions: Donnez des réponses personnelles. 1. Tu vas souvent au cinéma? Answer: Oui, je vais souvent au cinéma. 2. Qu'est-ce que tu aimes comme films? Answer: J'aime un film d'horreur. 3. Quel est ton acteur

111. ## Literature

I need help writing a free verse poem on a newspaper article I read about a cat being stuck in a vending machine for three days. Can I please get some links that can help me start off? Free verse poems are really easy to write, but I'm not sure how to

112. ## physics

An ideal gas in a container is at a temperature of 76.3°C. What is the average translational kinetic energy of a gas molecule in the container? _________J

113. ## math

62.5% in fractin and decimal: ?

114. ## h

I was also quite taken aback that I was no longer frightened by the story that the book described Is this correct?

115. ## Statistics

A researcher is trying to find out which cereal is the favorite among five year old children in a certain community. A few cereals are mentioned over and over again and some cereals are barely mentioned. In reporting which cereal was the favorite, would

116. ## Social studies

Which american indians refused to move away from their homeland after the government orderd them to leave.

There were 93 students going to a nature camp. After equal groups of fewer than 10 students were formed for hiking, 2 students were left over. How many equal groups were formed?

118. ## math

Consider the set of northwestern states or provinces {Montana, Washington, Idaho, Oregon, Alaska, British Columbia, Alberta}. If a person chooses one element, show that in three yes or no questions, we can determine the element.

119. ## Statistics

How can predictions be made from correlations?

120. ## Hamlet

Something is rotten in the state of Denmark. (I.iv.90) Using two different literary devices, prove or refute the quotation above.

121. ## algebra 2

how do you solve quadratic equations by factoring?

123. ## algebra 2

how do you solve quadratic equations by finding square roots

124. ## h

The discoveries of the tombs and mummies must have been breathtaking for those lucky few that found them. "that" or "who"?

125. ## USINGWINDOW XP VISTA

In window Vista, which process allows you to display two documents side by side

126. ## Math

Write an equation in a standard form of the line that passes through (3,1) and has a y-intercept of-2 . My book does not have problems like this so PLEASE help me!!!!!!!!!

127. ## science

A component synthesized by photosynthetic producerrs on which all aerobic consumers depend is what

128. ## Social Studies quick question

James Watt invented the steam engine in what year, and where? Are these right In the 1760s he invented the steam engine in Britain

129. ## history

was General Douglas Haig a good or bad general? i think he was a bad general because he was only interested in winning the battle of the somme and not the lives of the soldiers.

130. ## algebra

Pick a country of your choice that is experiencing population growth. Using the Library, web resources, and/or other materials to find the most recent population count of the country you have chosen and the population growth rate of that country. Use that

131. ## macro economics

How do i construct an income effect graph and a substitute graph

132. ## Economics

While sitting in your office one evening, you begin to think about some of the key microeconomic messages you want to communicate to the Board. (Key concepts include, but are not limited to, supply and demand, pricing, competition, costs & production, and

133. ## math

or this one tracey has 4,300 in his savings account. the money in the account earns 4.6% intrest each year assuming he makes no deposits, how much money will he have in his account atthe end of the year? i don't know how to figure that

134. ## Science

What are some of the problems when designing a new single cell

135. ## math

i still don't get it ...Our class planned a holiday party for disadvantaged kids.Some of us baked cookies for the party.On the day of the party,we found we could divide the cookies into packets of two, three, four, five, or six and have just one cookie

136. ## Algebra

A metal stays solid at Fahrenheit temp below 1868.5 Determine (in terms of an inequality) those Celsisu temp, for which the metal stays solid. Use the formula F=9/5c+32

137. ## Imaginary Number i

I'm have a few questions about i: -How come sometimes you solve to get rid of it, other times you leave the it? For example, 4(-2+3i) becomes -8+12i, while other times (3+2i)(3-2i) yields 13 (the i is turned into negative one). How do you know when to keep

138. ## science

Explain why water is an important solvent in the environment.

139. ## economics

can one determine that a project was successful by the customers reaction?

140. ## Density

If the actual density is 1.2686 g/mL and the determined density by experiment was 1.0275 g/mL, is it reasonable to conclude the obtained product was fairly pure. I am writing a lab report and these were my results and interpretation, but I am not sure if

141. ## microecon

Our professor gave us a exercise to do for fun where he said to derive profit=PQ(P,A)-C(Q(A))-A (note Q is a function of A both for revenue and cost) the answer I came up with is profit= Pdq/da -Cqfq/da-1 =Pdq/da -(d+c/dq)(dq/da) Im not sure if I am right

142. ## MATH

ROUND 427,685 TO THE NEAREST THOUSAND

143. ## class rank

what does the class rank 1 out of 120 mean?

144. ## Socials

This is a table: table 5-1: 1845 Census ______________________________________ Total population 223 054 ______________________________________ People living in cellars 40 000 ______________________________________ People living in crowded apartments 60 000

145. ## English

can u help me unscramble this word Dolurf

146. ## French

Could you check these thanks: Directions: Vrai ou Faux? 1. Un film doublé a des sous-titres. Answer: vrai 2. Un film en version originale est toujours en français. Answer: faux 3. Au cinéma, il y plusieures séances le week-end. Answer: Faux 4. On peut

147. ## language

Ronald has a goldfish. His goldfish weights 12 lbs. If Ronald feeds the gold fish 2 ounces of food every hour and the fish gains 2 ounces each hour,how many pounds would ronalds goldfish weight in 5 days?How many lbs of food does the goldfish eat in a

148. ## Elementary Math

Which of the following sets are functions from the set of first components to the set of second components? (a) {(b, a), (d, c), (a, e), (g, f)} (b) {(a, b), (b, a), (c, c), (a, c)} (c) {(b, a), (c, a), (b, b), (c, b)}

149. ## research

The research process has a number of components and each is a separate, independent activity?

150. ## history

what is the most important contributions of physics to industry

151. ## us history

what was america's first constitution called? a american constitution b articles of coonfederation c republic plan

152. ## social syudies

Why can't the united states make as much money as they want?

153. ## math

how can you get a ping pong ball out of a hole that is 2metres deep? the diameter of the hole is 10 mm greater than the diameter of the ball.

154. ## Chemistry

The titration of a sample of a weak acid with an equivalent weight of 108 grams requires 38.2 mL of 0.100 M NaOH. What is the sample mass in mg?

155. ## h

The destruction of the great city, then its clumsy discovery of the ruins in the 19th century, enthralled me. Is the grammar correct? anyway I could change the wording to make it flow better?

156. ## Algebra

Could you please check my work? 3/(x-7)=2/(2x+1) 3(2x+1)=2(x-7) 6x+3=2x+-14 x=-4.25 I appreciate it.

157. ## english

How to get started writing a thesis paragraphs with these 3 reasons: 1.you are old enough and can take care of yourself. 2.with mobile phones,it's possible to keep in touch with them on a regular basis,which would not be too stressful and worrisome. 3.if

158. ## Math

One card is selected at random from an ordinary set of 52 cards. Find the probability of each of the following events: b. A spade and a 5 are drawn. d. A jack is not drawn.

159. ## Math

Petra bought gasoline when the odometer read 15,345.4 .After the next filling, the odometer read 15665.6 .It took 13,4 gal to fill the tank. How many miles did she drive. How many miles per gallon did the car get.

160. ## biology

4. Which of the following species is extinct? 1 American bald eagle 2 bison (buffalo) 3 passenger pigeon 4 giant panda

161. ## calc

a) Suppose f(x) is defined on 0 ≤x≤1 by the following rule: f(x) is the first digit in the decimal expansion for x. For example, f(1/2) = 5 and f(0.719) = 7. Sketch the graph of y = f(x) on the unit interval with appropriate scales for x and for y. Use

the following in your paper: o Include how you applied concepts to formulate your decision o Include appropriate quantitative concepts and your application to find resulting data to reduce uncertainty in this decision. o Identify each outcome from your

163. ## math

Find decimal and fractional notation for the percent notation in each sentence. Be sure to simplify fractions. They are based on a 2,000 calorie day. 1 ounce provides 9% of the mdv of fat

164. ## grammar

Sometimes it took days until I could pull out the artifact that had staring me in the face, and not doing so beforehand had taken much patience and self control. Is the grammar correct?

165. ## college

name one Customer Relationship Management characteristic in share of customer

166. ## Creative Writing

So, for my assignment on extending the definition of family, I will develop the definition by telling what family means to me. I am starting this essay right now, if there's any suggestions or commments that will help me please let me know. I want to take

167. ## Math

Please help me find the pattern 212 , 106 , 135 , 67 , ___ , 47

168. ## Social Studies

What is yam? Is it sweet potato or potato? What is the difference between yam and sweet potato?

169. ## physics 11

for a project we're required to create a thermose from household products. What ideas can we use to create an insulator. Any other ideas to keep the heat inside the thermos. Thank-you

170. ## Social Studies

Compared with college students in the 1960s, college students today are a. more liberal on some issues, more conservative on others. b. more conservative on most issues. c. more liberal on most issues. d. about as liberal on more issues. e. much more

Explain how you could show five less than a number using an expression

172. ## Literature

Is my prose poem alright? Every morning, my father goes to work and us to school because we have the liberty to do that. Everywhere, all types of people are working as one and having a fine time. Back in the day, some people weren't allowed to work and the

173. ## MTH 213-Elementary Math

(a) Illustrate a one-to-one correspondence between the following sets: N = {1, 2, 3, 4,. . . , n,. . .} F = {4, 9, 14, 19, 24,. . .} (b) In your correspondence, what element of F corresponds to 57? Explain why. (c) In your correspondence, what element of F

174. ## English

Can you please just check the grammar in this for me. Thank you Nella Larsen theme is to teach the readers that sometimes it is best to deny ones racial heritage rather than to accept it or identify with it. When it comes to certain situations when race is

175. ## Math

How do you estimate the quotient of 193 divided by 6

176. ## Algebra

Any and all help would be greatly appreciated. I'm trying to help my niece and I'm afraid that it is not possible. The volume of a cubic container is x^3 cubic inches. The height of the container was decreased and the length was increased so that the

178. ## government

Whatis the historical explanation of the 7th amendment?

179. ## Algebra

Do I have this right? A first degree polynomial crosses the x axis A second degree polynomial touches the y axis without crosisng A third degree polynomial flattens against the y axis.

180. ## Algebra

I don't know how to solve 12x(2)-15x=0 using the quadratic equation ax+bx+c=0 with this question I am unsure of what a, b and c are supposed to be, therefore I do not know how to solve this! Please help!

181. ## Chemistry

One last question.... Which of these two metals (Aluminum or Copper) would be a better choice to make silverware out of? Specific heat of: Al = .901 Cu = .39 my guess was the aluminum, because it would take longer for it to get hot, since it requires more

182. ## English

1. Which genre Shrek is? 2. Which genre is Shrek? (Which one is correct?) 3. That is a girls' middle school. 4. That is girls' middle school. (Which one is correct?) 5. Introduce your favorite book, and write what's the story about. 6. Introduce your

183. ## Statistics

What are some examples of how data can be misconstrued if we are not careful to report it in the same way that we collect it?

184. ## English CRT 250

your child is trying to prove that she did not steal chocolate chip cookies from the cookie jar, so she makes this argument: “There are no chocolate stains on my hands, so I couldn’t have stolen the cookies.”

185. ## Careers

Are there any careers where business and social sciences overlap? I can't decide between what I wanna do. I enjoy both.

186. ## AP Chemistry

okay, so i'm working on a specific heat lab right now. I have one question that I am really stuck on... Here it is: Why should the metal be dry before dropping it into the calorimeter? ... is it because it affects the heat of the cube or it affects the

187. ## grammar

The field school was an amazing and eye-opening experience in which I was able to travel to an area I had never visited before and learned about a culture I hadn’t known about.

I have a q

189. ## To Ms. Sue

Ms. Sue can you please have a moment to look at my previous post, thanks

190. ## art

what is a music self portrait

191. ## physics

A transverse wave on a string is described by the following equation. y(x, t) = (0.35 m) sin[(1.25 rad/m)x + (92.8 rad/s)t] Consider the element of the string at x = 0. (a) What is the time interval between the first two instants when this element has a

192. ## french

what is french polynesia ??????

193. ## algebra

this is not algebra. I just need to know how to find a percentage of something.

194. ## algebra 2

how do you graph quadratic functions

195. ## gr.12 bio

how did natural selection influence the degree and rate of evolutionary change?

196. ## Physics

i spent so much time putting this equation together, but now I'm so confused solving for T 110 g x 4.816 J/g/C x (T-17)+31g x 0.385J/g/C x (T-300)=0 Can you help me

197. ## math

thank you! this one is hard. four tellers are in a contest to see who can help thepersonal bankers schedule the most meetings with customers. aaron has 52 customer meetings tha clyde and cathy has 25% more than aaron. they want me to list the tellers from

198. ## spanish

correct for of ser or estar for... mi papa __________ maestro.

199. ## Chemistry

What volume in mL of .100 M NaOH would be required to titrate a 297 mg sample of a weak acid with an equivalent weight of 126 grams?

200. ## to the last one

how do i figure the equation 1/3 times 9??

201. ## computers

explain how computers are classified

202. ## french

how do you change a normal sentence in french to an inverted sentence? Example: change "Est-ce que nous parlons anglais?" to an inverted sentence

203. ## math

csc(6a+ð/8)=sec(2a-ð/8) Find values of A.

204. ## Pre-Algebra B

Find the area of a circle whose radius is 12.7 cm

what year was the world created?

206. ## AP Chemistry

okay, so i'm working on a specific heat lab right now. I have one question that I am really stuck on... Here it is: Why should the metal be dry before dropping it into the calorimeter? ... is it because it affects the heat of the cube or it affects the

207. ## physics

using the work-kinetic energy theorem: .5mvo^2 + Fo/c = .5 mv1^2 where v1 is the velocity at x max I got the following but it is not formatted proprerly. Where am I wrong? .5vo^2 +Fo/c*m = .5v1^2 vo^2 + 2Fo/c*m = v1^2 sqrt (vo^2 + 2Fo/c*m) = v1

208. ## social studies

why can't i find these mutiple meaning words

209. ## Health

Can getting wisdom teeth removed increase your susceptibility to the flu?

210. ## Science

What are the challenges of managing your chosen terrestrial resource issue? What human activities contribute to the problem?

211. ## algebra 2

how do you simplify (3x+5i)/(2i)

212. ## math

16. Which of the following sets are functions from the set of first components to the set of second components? (a) {(b, a), (d, c), (a, e), (g, f)} (b) {(a, b), (b, a), (c, c), (a, c)} (c) {(b, a), (c, a), (b, b), (c, b)}

213. ## math

two canadians board a bus. one canadian is the farther of the other canadian's son. how is this possible

214. ## math

draw a picture of a trapezoid. how many degrees in tital, are inside a trapezoid

215. ## MTH 213-Elementary Math

Let U = {u, n, i, t, e} A = {n, i, t} B = {n, e} C = {u, n, i, t, e} D = {u, e} Find each of the following:

216. ## math

ok sam has a savings account that increased in value over a twelve month period from 8765.00 to 9006.04. he made no deposits or withdreals in that time. what percent intrest did he receive for the 12 month period? HOw to i figure that out??

217. ## math

Explain how you can show five less than a number using an expression

218. ## AP Chemistry

One last question.... Which of these two metals (Aluminum or Copper) would be a better choice to make silverware out of? Specific heat of: Al = .901 Cu = .39 my guess was the aluminum, because it would take longer for it to get hot, since it requires more

219. ## financial literacy

what are the 5 most important parts of a school budget?

220. ## math

why is this man a fraud? ihold it before your eyes! said the man exactly. this stuff right here in this test tube! you can see it! in seconds. mere seconds, it will dissolve any matter that touches it!

221. ## math

i don't know ms sue

222. ## Math

If you have 200 blocks and want to stack them in a solid shape, how many shapes can you stack them?

223. ## algebra 2

how do you solve quadratic equations by finding square roots i have no clue how to do this. I have fallen behind in my math class because my teacher is horrible. I need to learn this to understand everything in the section in the section. I beg someboody

224. ## Math

In 2001, credit card companies mailed 5 billion credit card applications to 262 million people. On average, how many applications were mailed to each person? Express your answer to the nearest whole application.

225. ## math

may be i get the answer the glass is transparent

226. ## organic chemistry

Two students are running C-13 nmr, one student has pare-xylene and the other has meta-xylene. Explain how they will be able to distinguish the two spectra.

227. ## Helen

But it is your highly regarded Anthropology program that caught my attention. It is with the help of that department that my passion for history and Archeology will flourish, and my dream of becoming an archeologist will be made real. Is the grammar okay?

228. ## Math

Please help me find the pattern 212 , 106 , 135 , 67 , ___ , 47.5

229. ## english

which sources are reliable and which are not?

230. ## Physics

A race car starts from rest on a circular track of radius 507 m. The car's speed increases at the constant rate of 0.790 m/s2. At the point where the magnitudes of the centripetal and tangential accelerations are equal, find the following. (a) the speed of

231. ## Environmental Science

identify a viewpoint given in the video that highlights the importance of biodiversity. Do you believe that every species is connected to one another as expressed in the video? Why or why not?

232. ## Marketing

Name one CRM characteristic found in share of customer

233. ## math

but mrs sue can do the first 2 numbers so that i can finish cause i don't get it

234. ## gr.12 bio

how did natural selection influence the degree and rate of evolutionary change?

m/7 = 8/5

236. ## math

following sequence: 1,4,9,16,......

237. ## physics!!!!

A spaceship passes Earth at a speed such that γ = 112. A creature aboard the vessel does the Mongoian greeting dance that takes it 21 s (on its clock -- bought on a previous visit -- which is why it reads in seconds) to perform. How long will the

238. ## math

i don't know ms. sue i did not get the question

239. ## hca/240

provide an overview of obesity in 2000 words

240. ## Science

A student heats 4.00 g of a blue compound, which reacts completely to produce 2.56 g of a white compound and an unknown amount of colorless gas. What is the mass of the gas? Answer?_________ Work area: Reactant (s) = Product (s)

241. ## English

1. It's about father's love to children. 2. It's about Father's love to children. 3. It's about Fathers' love to children. 4. It's about a father's love to children. 5. It's about the father's love to children. (Which ones are grammatical?)

242. ## math

write 2 different improper fractions that equal to 4 2/3.

243. ## MATH

rewrite in distributive property 2(a+4)

what is 2cm 72mm plus 69mm

245. ## math

the price for a stock has decreased from \$24.50 per share to 18.60 per share. what percentage is the decrease? how do i figure this question out please?

246. ## social studies

what word means to occupy the mind excessively

247. ## math

what phony means

248. ## Math

the sum of 2 whole number is 72 and the difference is 48

249. ## history

Please verify: the workers that were generally better off in America than Europe before 1860 would have been the skilled workers? The most important iron manufacturing center in the South was the Atlanta Iron Foundry? Utopian societies emerged in the

250. ## social studies

why can't i find these mutiple meaning words

251. ## Thanks everyone!

oh durr thanks!! hehe

252. ## science

where does the energy source come from, is it easy to obtain, etc?

nooooooooo