# Questions Asked onJune 26, 2012

1. ## calculus

A company manufactures and sells x cellphones per week. The weekly price-demand and cost equations are given below P=400-.5x and C(x)=20000+130x What price should the company charge for the phones and how many phones should be produced to maximize the

2. ## MATH

One light flashes every 2 minutes and another light flashes every 3.5 minutes. Suppose both lights flash together at noon. What is the first time after 1 PM that both lights will flash together ?

3. ## physics

the motion of a particle along a straight line is described by the function x=(2t-3)^2 where x is in metres and t is in seconds. A)find the position ,veocity and acceleration at t=2 sec. B) find the velocity of the particle at origin.

4. ## US Government

people who believe voting is important have high political ...? what clue:(8-letter word) ----c-c-.

5. ## U.S. GOVERNMENT

1)Independents are people who have strong party affiliation. A) True B) False 2)About 75% of those eligible to vote did so in the 2000 presidential election. A) True B) False 3)If we are indeed a democracy, a government by the people for the people, then

6. ## english

Choose the sentence in which the verb has a direct object. A. George was furious. B. I walked away. C. They won the game. D. She is insecure.

7. ## Trig

From a point P on level ground, the angle of elevation of the top of a tower is 27°10'. From a point 23.0 meters closer to the tower and on the same line with P and the base of the tower, the angle of elevation of the top is 51°30'. Approximate the

8. ## Chemistry

What is the molar concentration of sodium in a 200ml solution prepared from 1.223g of sodium phosphate?

9. ## Chemistry

Write the net ionic equation for the reaction that takes place between a solution of magnesium chloride and a solution of sodium hydroxide.

10. ## phsc

When you are driving a golf ball,a good follow-through helps to increase the distance of the drive. A good follow-through means that the club head is kept incontact with the ball as long as possible.Why does this technique allow you to hit the ball farther

11. ## U.S. GOVERNMENT

The social group that has the most influence on how you will vote is your --m--- A fill in the blank question

12. ## English

Which of the following sentences uses a preposition properly? A. Connor waited in line while Ava parked the car. B. Where is David at? C. There was a big argument between Megan, Abira, and Lena. D. I might of lent him the book, if he had asked

13. ## physics

A mouse is running away from a cat at. 75 m/s and, at 1.25 m from his mouse hole, he accelerates at a constant rate of. 25 m/s^2 until he reaches his hole safely. How long a time was required for him to cover te last 1.25m?

14. ## Chemistry

Silver nitrite, AgNO2 (47.8 mg), was dissolved in water to make 10.00 mL of solution. Then 3.00 mL of that solution was used to make a new solution with a total volume of 1.000 L. What was the concentration of the silver ion in the final solution?

15. ## english

Which sentence below contains a correctly used modifier in italics? A. Joe looked sad at his broken bike. B. The sauce tasted bitterly, and I couldn't swallow it. C. He spoke sharply to his sister. D. I feel badly because I lost the race.

16. ## Alegebra

N is the number of buttons in a sewing box. N is more than 40 but less than 80. When N is divided by 5 , the remainder is 2. When N is divided by 7, the remainder is 4. What is the value of N?

17. ## algebra

This is a problem about logarithms: I'm completely confused as to what to do here: The logarithmic form of 84 = 4,096 is log8 4,096 = 4 Write the logarithmic form of x5 = the value of this quantity Explain the steps of conversion.

18. ## english

There are never enough discipline on the playground: someone always is getting hurt. Subject verb agreement.

19. ## Finance

A firms growth rate is 8%, the ROA = 10%, the debt ratio is 20%. The stock is selling at \$36. What is the return on equity?

20. ## math

Thr figure below is made up of four congruent circles Each circle is tsngent to two of the other 3 circles as shown. If the radius of each circle is 6 units, what is the area of the shaded region inthe figure below? Express your answer as adecimal to the

21. ## phsc

You have a choice,you may get hit head-on by either an adult moving slowly on a bicycle or by a child that is moving twice as fast on a bicycle.The mass of the child is-one-half that of the adult on the bicycle.Which collision do you prefer ?

22. ## Physics

A person with a black belt in karate has a fist that has a mass of 0.70 kg. Starting from rest, this fist attains a velocity of 6.9 m/s in 0.15 s. What is the magnitude of the average net force applied to the fist to achieve this level of performance?

23. ## math

Find the length of the diameter of a circle whose endpoints are at (11, 4) and (10, 5).

24. ## Psychology

Four weeks from from conception,cell division:

25. ## Physics Diploma

the intensity and direction of the electric field produced by an alpha particle at a distance of 5.0 x10^-11m from the particle is [1.2x10^12 N/C away from the alpha particle] how do you get the direction? thanks

26. ## Physics.

when an e- and a positron collide they're annihlated and their mass converts to engery. the energy released is? [1.64x10^-13 J]

27. ## Organic Chemistry

A lower yield of phosphonium salt is obtained in refluxing benzene than in xylene. Look up the boiling points for these solvents, and explain why the difference in boiling points might influence the yield. I'm not sure how to answer this question. I see

28. ## US Government

Non-voting is a huge problem in the US because... A)many Americans think voting does not make a difference. B)most voters think that all elections are of equal importance. C)many illegal aliens vote. D)most Americans do not believe in democracy I know its

29. ## math

simplify the expression (4m-2n)+(-3m-4n)

30. ## physics

A mouse is running away from a cat at. 75 m/s and, at 1.25 m from his mouse hole, he accelerates at a constant rate of. 25 m/s^2 until he reaches his hole safely. How long a time was required for him to cover te last 1.25m?

31. ## english

They are going to the park and play or they are going to the park to play. Which one is correct.

32. ## Chemistry

How would I figure out what is produced during a chemical reaction between 0.5 grams of sodium bicarbonate and 3 grams of citric acid? I know that it produces carbon dioxide and water but my professor said I am missing something from my equation.

33. ## Physics

at what distance would a convex magnifing lens that has a focal length of 10 cm have to be held for an image to appear upright and 3 cm tall? [6.67cm]

34. ## Chemistry

Tube worms that survive near geothermal vents of hydrogen sulfide rely on bacteria living inside them to obtain energy by the oxidation of H2S to SO4^2-. What is the overall change in the oxidation number of sulfur for this reaction?

35. ## Algebra

I have no idea how to even begin writing this out. I need help desperately. A student deposits \$6,000 in a savings account with x% continuously compounded interest. How many years must he wait until the balance has doubled?

36. ## phsc

Two identical cars have the same speef one traveling east and one traveling west.Do the cars have the same momentum ?

37. ## phsc

A satellite explodes in outer space, far from any other body,sending thousand of pieces in all direction.How does the linear momentum of the satellite before the explosion compare with the total linear momentum of all the pieces after the explosion ?

38. ## Physics

In the amusement park ride known as Magic Mountain Superman, powerful magnets accelerate a car and its riders from rest to 36 m/s (around 80 mi/h) in a time of 5.5 s. The mass of the car and riders is 4900 kg. Find the average net force exerted on the car

39. ## Chemistry

How many grams of calcium phosphate are theoretically produced if we start with 10.3 moles of Ca(NO3)2 and 7.6 moles of Li3PO4?

40. ## PHSC

Explain how you could move an object and still do no work.

41. ## PHSC

Explain the difference between the everyday use of the word "work" and the physical (physics related)use of the word "work".How is energy related to work?

42. ## PHSC

In a simulation on earth,an astronaut in his space suit climbs up a vertical ladder.On the moon,the same astronaut makes the same climb.In which case does the gravitational potential energy of the astronaut change by a greater amount?

43. ## physics

A ball is thrown horizontally from a cliff and hits the ground 4 seconds later 40 meters from the base of the cliff. How high was the cliff (rounded to the nearest tenth of a meter)?

44. ## Algebra 1

1. A bag contains 3 red marbles, 2 blue marbles, and 5 green marbles. What is the probability of randomly selecting a red marble then, without replacing it, randomly selecting a green marble? 2. A bag contains 5 blue marbles, 6 red marbles, and 9 green

45. ## Psychology

The fertilized egg is called a/an

46. ## Physics

at what distance would a convex magnifing lens that has a focal length of 10 cm have to be held for an image to appear upright and 3 cm tall? [6.67cm]

47. ## Algebra

I can not get he correct answer -10. -3/3{a+c(b+5)-(-6+a)} a=1, b=-6, c=-4

48. ## Physics Diploma

how do i go about answering thiss question? particles with a mass of 7.96x10^-27 and have a (+2e)are accelerated by a voltage and kept in a magnetic field. at one stage the ion starts ar 1x10^6 m/s and exits at 2.75x10^6 m/s. immediatleyt after theey enter

49. ## prealgebra

2 1/5 % of 70 Round to the nearest hundredth

I ask a friend to watch my bike while I go shopping, and the bike gets stolen. I can sue my friend for damages but only if I can prove that my friend was: grossly negligent, or failed to exercise at least slight care, or failed to exercise reasonable care.

51. ## macroeconomics

One of the main results of the Depository Institutions Deregulation and Monetary Control Act of 1980 may be to: A. lessen the number of financial institutions in the United States. B. increase the number of financial institutions in the United States. C.

52. ## Algebra

There is a water tank with a drain of an unknown size that is always open. There is a series of input pipes above it which are all the same size. When 4 pipes are on, it takes 6 hours to fill. When 3 pipes are on, it takes 10 hours to fill. How many pipes

53. ## Trivia

The day before yesterday, Lisa was 13. Next year she will be 16. How is this possible?

54. ## agl 2

rewrite: tan 4 X + tan 2 X/ 1 - (tan4X)(tan2X)

55. ## Social Studies

Question: Why do some people object to foreign ownership of the us business and real estate? My Answer: Many people argue against foreign ownership because they worry about foreign control.

56. ## Social studies

Question: why do you think the united states is attractive to foreign investors? My Answer: anytime political upheaval strikes in an another part of the world, foreign investment in the United States increases because we remain a politically stable

57. ## Physics

Suppose a new extrasolar planet is discovered. Its mass is double the mass of the Earth, but it has the same density and spherical shape as the Earth. How would the weight of an object at the new planet's surface differ from its weight on Earth? (Let Wnew

58. ## Chemistry

Silver nitrite, AgNO2 (47.8 mg), was dissolved in water to make 10.00 mL of solution. Then 3.00 mL of that solution was used to make a new solution with a total volume of 1.000 L. What was the concentration of the silver ion in the final solution?

59. ## math

They start riding bicycles towards each other in a plan to meet at the midway point. Each is able to ride at 7 MPH. They live 42 miles apart. One of them has a pet pigeon and it starts flying the instant the boys start traveling. The pigeon flies back and

60. ## physics

An object weighing 345 N in air is immersed in water after being tied to a string connected to a balance. The scale now reads 250 N. Immersed in oil, the object appears to weigh 295 N.

61. ## Physics

The Moon causes tides because the gravitational force it exerts differs between the side of the Earth nearest the Moon and that farthest from the Moon. Find the difference in the accelerations toward the Moon of objects on the nearest and farthest sides of

62. ## macroeconomics

Which of the following theories of expectations holds that individuals use all information available in forming expectations? A. Rational expectations theory B. Certainty equivalent theory C. Expected value analysis D. Adaptive expectations theory i think

63. ## Algrebra 1

What are the practical uses of scientific notation? Why is scientific notation so important in modern-day society?

64. ## english

What word in the sentence is most clearly a loaded word? Suppose the following sentence appears in the sports section of the newspaper: Lorton's experienced linemen performed well in handing Jefferson High's Eagles a crushing defeat.

65. ## math

Sandy is 5.3 feet tall. How many centimeters tall is she? Round your answer to the nearest tenth.

66. ## math (story problems)

Andy took a reading test. He read 97 words per minute. If a book has an average of 250 words on a page, how many pages can Andy read in one hour?

67. ## Chemistry

An impure sample of substance X melts at about 113 degress. Which of the substances could be X and state y Resorcinal 111 degrees Catechol 105 Nitrophenol 114 Butanamide 115 I think it is either catechol or resorcinol because as stated the higher the

68. ## math

The average weight of five ducklings is 6 ounces. if the average weight of 3 of the 5 ducklings is 5.25 ounces what is the average weight of the other 2 ducklings?

69. ## Math

89 devided by 289 is?

70. ## Chemistry

When the oxidation-reduction reaction shown here is balanced, how many electrons are transferred for each atom of copper that reacts? Ag^+ + Cu = Ag + Cu^2+

71. ## math

if a flag is 4 feet by 6 feet, has 13 horizontal stripes(6 white and 7 green) and has a green square in the upper left hand corner measuring 25 inches by 30 inches how many square inches are the white stripes of the flag? Express your answeras a decimal to

72. ## physics

three forces f1,f2and f3,along the same line are acting on abody. if f1=40Nto the right,f2=60N to the right, and f3 is 160N to the left,what is the resultant force of the body?

73. ## physics

A race car starts from rest on a circular track of radius 265 m. The car's speed increases at the constant rate of 0.540 m/s2. At the point where the magnitudes of the centripetal and tangential accelerations are equal, find the following.

74. ## Physics: Theory

the relationship between the propaganation of an electromagnetic wave and the direction of its electric and magnetic fields are that they are, a) perpendicular to each other and parallel to the direction of propagation b) parallel to each other and

75. ## chemistry

If a sample of MgCl2 is known to contain 0.100 moles of Mg ions, how many moles of Cl ions are in the salt sample?

76. ## algebra

what are the ordered pair of 6x+7y=44, x=54-7y

77. ## Math

What times something equals to 84? Like this: ___×__= 84.

78. ## Physics: Formulas

the momnetum of a gamma photon is determined by the equation p=h/lambda. for the decay of iodine-131 the relationship between the magnitude of the momentum of the gamma ray photon and the mangnitude of the momentum of the beta particle can be represented

79. ## Definite Integrals

Integral of theta^3*lnsintheta with respect to theta from 0 to pi

80. ## Algebra

how to tell the difference between a negative number raised to a power and the opposite of a positive number raised to a power. Use examples in your explanation.

81. ## college chem

How do i write the overall reaction equation for the synthesis of aluminum potassium sulphate dodecahydrate

82. ## Math

Use the method of substitution to solve the linear equation! 6a=6-b 6a=5-b please help I don't get it it needs to be an ordered pair.

83. ## Math

What does it mean when it comes too -->prime

84. ## Chemistry

Which of the following metals would be expected to have the most unstable salts? a) sodium b) zinc c) tin d) silver Please define for me what 'unstable salts' are please?

85. ## statistics

The first sample had 49 subjects and 7 had blue eyes. The second sample had 465 subjects and 244 of these had blue eyes. What is the value of the pooled estimate of the proportion used to test the hypothesis that the population proportions of blue eyes are

86. ## Math

The Robinsón's electric bills for the last five months have been \$157.60, \$182.09, \$175.15, \$166.27, and \$162.04. Find the average of the bill. (To find the average, divide the sum by the number of addends.) -What does the sentence in the parentheses

87. ## math

How do I set up a truth a truth table for: All, programmers are fast typist. Some, fast typist are clever. Therefore, some programmers are clever. I know this is an invalid argument but I"m not sure what the truth table should look like. thanks.

what are the tree steps to join a team canadian mission?

89. ## Physics

A carefully designed experiment can measure the gravitational force between masses of 9 kg. Given that the density of iron is 7860 kg/m3, what is the gravitational force between two 9.00-kg iron spheres that are touching in N?

90. ## algebra

Jared as length of string that measures 15 3/4 feet. if he cuts off a piece 6.5 feet long, how much of the string will he have left?

91. ## english language

why i dislike to being monitor of my class

92. ## Maths Investments

Kate is thinking about investing \$60 000 for 4 years. She deposits her money into an account which earns interest paid semiannually at a rate of 7% p.a. After 2½ years, the interest rate drops to 5.6% p.a. and stays constant for the remainder of the

93. ## math

IN my math book i got a question that said 1/3 times 25 i got an answer of 10 if it is not right can you show me how to do the problem.

94. ## math

a gardener is planning to make a rectangular garden with an area of 80ft^2.she has 12 yards of fencing to put around the perimeter of the garden.what should the dimension of the garden be ?

95. ## Math LCM

What is the LCM of 8, 11, 36, 80?

96. ## Science

How Would I Draw A Picture Of A Connection Involving the hydro Sphere(water).

97. ## MATH

One light flashes every 2 minutes and another light flashes every 3.5 minutes. Suppose both lights flash together at noon. What is the first time after 1 PM that both lights will flash together ?

98. ## SOC120

what is moral minima

99. ## Math

I am a 5-digit number. I have the digit 4 in the hundreds place and tens place. The digit 7 stands for seven and the digit 3 stands for thirty thousand. The digit 6 stands for six thousand. What number am I?

100. ## colege algebra.

what does square root of x^2 times x-5 divided by 3 times square root of x simplify to?

101. ## Art

Can you please check these two sentences? Thank you. 1) Why did the doctor prescribe Coleridge opium? What did Coleridge suffer from?

102. ## arithmetic

what is 4.2% of \$24,000?

103. ## chemistry

determination of the oxalate content in k2 cu(c2o4)2 .2h2o, during standardization of permanganate solution using sodium oxalate, can the titration between Mno4- and C2o42- at 25degree celcius be perform?

104. ## algebrall

Which is an arithmetic sequence? A. 1, 4, 9, 16, . . . B. 2, 1, –1, –4, . . . C. 4, 8, 16, 32, . . . D. 21, 9, –3, –15, . . . . help please

105. ## math

what is the slope and y intercept of x=2

106. ## math

A recreation room has the following dimensions. Carpeting will cost \$1.50 per square foot. How many square feet of carpet will be needed and how much will it cost?15 ft, 33 ft, 12 ft, 12 ft.

107. ## Math

find the perimeter and area of a right triangle if the shortest side is 9 inches and the longest side is 41 inches

108. ## Physics

The fallowing spheres are touched in this order... step 1: K & L step 2: K & M step 3: L & M the final charges on the three spheres are [K = +x/2] [L = -x/4] [M = -X/4] thanks

109. ## Mathematics

karen exchanged BDS\$ two thousand dollars and received EC\$ two thousand seven hundred calculate the value of one BD\$ in EC\$ I would just like the formula so i can work it out please

110. ## 4 grade array NEED ASAP!!

whats an array? and how would i show it with plastic dimes. i need to help kids find 8 x 70 can you explain how you would do it??

111. ## Physics Diploma Q?

a photon drops from -22 eV to a ground state of -89.2 eV. the frequency the photon emits is? [1.62]

112. ## Art

Can you please check if the following sentences are correct? Thank you. 1) “I met Mary last Monday.” (she/say) She said that she had met Mary the previous Monday. 2) “I’m sorry, I broke the vase.” He apologized for breaking the vase. 3) “ You

113. ## physics

find the area of parallelogram whose adjacent sides are +3+3 and -3-2+.

114. ## Art

I left out the following sentences. Thank you, Writeacher 1) Transform the following active sentences into the passive voice using the personal construction 1) He sent me an invitation. I was sent an invitation 2) They will offer him a better position in

115. ## physics

a gun is fired from a distance of 1:2 km from a hill. The echo of sound is heard after 7:1seconds at same place. Calculate the velocity of bullet fired.

116. ## algebra1

factor: 180s^2+300sf+125f^2

117. ## physics

a stone is dropped from arising balloon at a height of 76m above the ground and reaches the ground in 6 seconds. Caculate the velocity of ballon when the stone was dropped?

118. ## Foreign languages

Can you also check this other exercise, please? Thank you very much. 1) Complete with the correct form of the verbs in the past simple, past perfect, and past continuous. 1. My friend ............. (be) very upset because someone ....... (steal) her bag

119. ## math

The answer is 8 1/3 Ms.sue how do you estimate