1. Calculus

I need help setting up the equation. The portion of the graph y = ex between x = 0 and x = ln 3 is rotated around the y axis to form a container. The container is filled with water. Use n = 4 subintervals and midpoints to approximate the work required to

2. Calculus

A stone is dropped from the edge of a roof, and hits the ground with a velocity of -145 feet per second. How high (in feet) is the roof

3. SQL

Display a list of all instructors, showing their ID, name, and the number of sections that they have taught. Make sure to show the number of sections as 0 for instructors who have not taught any section. Your query should use an outerjoin, and should not

4. math

a committee of 5 people is to be selected from a group of 6 men and 9 women. If the selection is made randomly, what is the probability that the committee consists of 3 men and 2 women?

5. chemistryB

How much heat is required to decompose 25.5 grams of NaHCO3? 2NaHCO3(s) + 129 kJ 2Na2CO3(s) + H2O(g) + CO2(g)

6. statistics

The weight of 14 healthy newborn children was measured. The sample mean was 7.5 pounds with corresponding standard deviation 1.2 pounds. These babies are from one hospital and we want to test whether the babies born at this hospital are different in weight

7. chem

an aq. solution(NaCl) made by using 133g diluted to a total solution volume of 1 L.Calculate the molarity, molality & mass % of the solution(density of solution = 1.08g/mL) [ans: M=1.92M, m=2.0m, 10.4 %] i need the calculation work bcus my ans is

8. Chem

Na2CO3 + 2HCl = CO2 + H2O + 2NaCl. What mass of CO2 is produced from the reation of 2.94g Na2CO3 with excess HCI?g

9. physics

an 8g bullet is shot into a 4kg block, at rest on a frictionless surface. the bullet remains lodged in the block. the block moves into a spring and compresses it 9.40cm. the force constant of the spring is 1000 N/m. a) what is the initial velocity of the

10. science

Assuming that radiation with a wavelength = 15.0 cm is used, that all the energy is converted to heat, and that 4.184 J is needed to raise the temperature of 1.00 g of water by 1.00 degree celcius, how many photons are necessary to raise the temperature of

11. debating

Our debating topic is 'That good news is not news.' I am on the negative team so I am saying that good news is, in fact news. I personally believe the good news really isn't news and so I'm struggling to debate for the negative team. I am the first

12. statistics

Two dice are rolled and two fair coins are tossed. Let X be the sum of the number of spots that show on the top faces of the dice and the number of coins that land heads up. The expected value of X is _____ .

13. Math-probability

A simple dartboard has three areas… the main board has a radius of 11 inches, there is a circle with a radius of 5 inches, and the bullseye has a radius of 2 inches. What is the probability of a random dart landing inside the bullseye? Round to the

14. Psychology

Cognitive psychology can best be described as: A) The study of higher mental processes. B) The therapeutic application of critical thinking. C) The area of psychology which attempts to reduce judegmental thinking. D) A subspecialty of psychology based

15. chemistry

find the maximum value of h2(g)in grams that would be expected to form by reacting 6.54g of zinc with 50ml of 0.1M of HCl.

the function f(x)= -o.005t^2+0.8t+12 models the relationship between a certain vehicle’s speed and fuel economy, where is the fuel economy in kilometres per litre and x is the speed of the vehicle in kilometres per hour. Determine the rate of change in

17. Chemistry

4 FeS(s) + 7 O2(g) ==> 2 Fe2O3(s) + 4 SO2(g) 7.82 moles of FeS are required to produce 3.91 moles of Fe2O3 What is the maximum number of liters of Fe2O3(s) that can be made from 10.95 L of O2(g) and 18.64 L of FeS(s) at STP?

18. Physics

Derive a function that gives the final speed of the cart as a function of the masses, ramp angle and distance up the ramp that the cart moves. Use conservation of energy to do this-no kinematics or Newton's Laws. I have 3 trials ,, 3 angles and 3 masses (

19. statistics

The height of 18-year-old men are approximately normally distributed, with mean of 68 inches and a standard deviation of 3 inches. What is the probability that an 18-year-old man selected at random is between 67 and 69 inches tall? Round your answer to the

20. math

whats the answer of 27/7 mixed into a number

21. early childhood

The use of _______ characterizes the teacher's method of initiating and directing children's verbal responses in a format that can confuse children from non-mainstream cultures. A language modeling B. evencasts c. school language d. language conventions i

22. Mathematics

A card is selected at random from an ordinary pack of 52 playing cards.state the probability the card is a club.

23. algebra

The formula R =−0.0026? + 4.0807 can be used to predict the world record, in minutes, for the 1500-m run t years after 1900. Determine (in terms of an inequality) those years for which the world record will be less than 3.8 min.

24. geometry

write and equation on point sloop form for the perpendicular bisector of the segment with endpoints A(-3,-3) and B(5,6)

25. chemistry

A sample of metallic element X, weighing 4.315 g, combines with 0.4810 L of Cl2 gas (at normal pressure and 20.0¢ªC) to form the metal chloride with the formula XCl. If the density of Cl2 gas under these conditions is 2.948 g/L, what is the mass of the

26. Chemistry

What mass of water, in grams, would have to be decomposed to produce 25.1 L of molecular oxygen at STP?

27. math

A car company is offering car loans at simple interest rate of 14%. Find the interest charged to a customer who finances a car loan of \$34000 for 2 years

28. algebra

I am tring to work these out and i have been in this for hours it is not clicking thanks for all the help. the question is: Snookers lumber can convert logs into either lumber or plywood. In a given day, the mill turns out twice as many units of plywood as

29. Word Problems

If your car gets 18 miles per gallon of gasoline, how many pints of gas will you need to take a 698- mile trip? I no that 1pt = 480ml and 1g= 3840 ml so do I x 18 miles per gallon by the amount of pints in a gallon?

30. math

find the eqt. of tangent to the curve y=-x^2+2x-10.[ans:y=2x-10] but my ans is y=-9. if im wrong could you show the calculation.

31. math

find the eqt. of tangent to the curve y=-x^2+2x-10 @ the point where the curve cuts the y-axis.[ans:y=2x-10] how do i do this because they didn't give me the point...?

32. biology

(Which of the following would least likely induce thirst) a)Dry pharynx b)Decrease blood volume c)decrease blood pressure d)decreased blood osmolarity

33. algebra

Essay. show all work. A gardener wants to create a triangluar garden in the shape of a right triangle with shortest legth x-3y ft. and the middle length side x+6y ft. What ia an algebraic expression for the area of the garden? be sure to multiply this out

34. MATH-too confusing :(

Last fall, a gardener planted 64 iris bulbs. She found that only 56 of the bulbs bloomed in the spring. a.) Find the empirical probability that an iris bulb of this type will bloom. Give answer as a fraction in lowest terms. b.) How many of the bulbs

35. Calculus

The base is an equilateral triangle each side of which has length 10. The cross sections perpendicular to a given altitude of the triangles are squares. How would you go about determining the volume of the solid described? The textbook answer is

36. MATH

The property restoration company PuroServ is considering switching to new dehumidifiers. Their market research, considering the cost of the new machines and their efficiency, tells them that the switch would give them a 54% chance of making a \$20,000

37. Biology

Briefly describe what effect you expect each of the following variables to have on enzymatic activity. 1. pH of 3.0 2. decrease in temperature 3. increase in substrate concentration 4. increase in enzyme concentration 5. addition of phenylthiourea(PTU)

38. English

Could you please check these few sentences? Thank you. It's urgent! 1) Though you are not a qualified Spanish teacher, I'll be happy to have conversation classes with you during my stay in Madrid. 2) I hope we can meet around 5 p.m. every day starting from

39. chem

A solution prepared by dissolving 20.2 mL of CH3OH in 100mL of water @ 25 celcius. The final volume of the solution is 118 mL. Calculate the % by mass. density CH3OH[0.782g/mL], H20[1g/mL] @ room temp.

40. math

d/dx x(1+y)^(1/2) + y(1+x)^(1/2)=0. Can some1 show me the calculation because i didn't get like the answer. [ans=-1/(1+x)^2 but my calculation=-(sqrt(y+1) (2 sqrt(x+1) sqrt(y+1)+y)/(sqrt(x+1) (2 sqrt(x+1) sqrt(y+1)+x)]

41. biology

You are attempting to determine whether a plant-derived processed food sample (for example, a corn chip) contains material from a genetically-modified organism (GMO). First, you crush the sample and attempt to extract DNA from it. Next, you perform PCR

43. algebra

A disc jockey must play 14 commercial spots during one hour of radio show.Each commercial is either 30 seconds or 60 seconds long. If the total commercial time during 1 hour is 11 min, how many 30 second commercials were played that hour? How many

44. algebra

Soybean meal is 12% protein; Cornmeal is 6% protein. How many pounds of each should be mixed together in order to get 240lb mixture that is 8% protein?

45. statistics

Two dice are rolled and two fair coins are tossed. Let X be the sum of the number of spots that show on the top faces of the dice and the number of coins that land heads up. The expected value of X is _____ .

46. Course CJA/393 - CRIMINAL ORGANIZATIONs

Define organized crime

47. Math - Probability

what is the probability of getting two sets of 8 digit numbers having 5 digit are the same number and order.

48. Physics

A ray of light falls on one of two plane mirrors placed at an angle of 90 degrees. show that the direction of the ray after two reflections is parallel to the direction of the original ray.

49. it

What is the meaning of it and marketing come together.i mean what is the result .why does marketing need it(information technology)?thank you.

50. english

Pretend that you writing to the editor of your local newspaper. Your purpose is to convince its readers that rather than solely relying on e-mail, people should mail a letter to their loved ones every now and then. Following is your first draft. Every now

51. Math

Given that the formula is y=-9cos12x+9 What is k in radian?

For a random sample of 10 men, the mean head circumference is x = 57.3 cm and the sample standard deviation is s = 2 cm. The standard error of the sample mean is: a. 0.200 b. 0.447 c. 0.500 d. 0.632

53. Mathematics

The standard deviation of given population is 4.5 with a mean of 60 and the refit population has a standard deviation of 5.2 with a mean of 75. Calculate the coefficient of variation for both populations and comment on the results.

54. soil

soil temperature as its varies with dept

55. math

find the coordinates of the point where the tangent to the curve y=x^3 +x +2 at the point (1,4) meets the curve again. [ans:-2,-8] pls help me i don't understand the question....

56. chemistry

find the maximum value of h2(g)in grams that would be expected to form by reacting 6.54g of zinc with 50ml of 0.1M of HCl.

57. healthcare

Health Care Costs For Consumers with dietary supplement. I need some basic points and to start my seach on this point. Thank you

58. Psychology

I have to describe the impact of bias on the lives of individuals. I know that bias can distort self-perception and causal attribution. I need help to properly explain this.

59. Math

If the probability of seeing moose in a day in a certain region of Alaska is 0.37, what is the probability of not seeing any moose in a day there?

60. Math

If the odds of winning a raffle are 17:214, what is the probability of winning?

61. algebra

solve by elimination x+6y-12 -x+7y=1

62. criminal law

Describe current parole and mandatory release policies

63. algebra

solve by elimination x+6y=12 -x+7y=1

64. math

side of the cube increasing at rate of 6 cm/s. find the rate of increase of the volume when the length of a side is 9 cm.[ans 1458cm^3/s] my answer: ~729x6=4374cm^3/s i need some1 show me the calculation if im wrong.

65. math

in a large survey, it was discovered that 1 out of every 5 adults visits disney world every year. if 30 adults are randomly selected, what is the probability that exactly 7 of them will visit disney world this year.

66. math

in a certain geometric sequence, the third term is 8 and the sixth term is 125. what is the first term?

67. math

the distance x cm and y cm are related by the eqt. 1/x+1/y=1/9, if x is increasing at a rate of 8 cm/s, calculate the rate at which y is changing when x=15. [ans:-18]

Explain how these laws intertwine: Title VII of the Civil Rights Acct of 1964, Civil Rights 1991, Opportunity act 1972, Age Discrimination of 1967, Disabilities act, immigration reform and control act of 1986, Fair labor standards act Also explain how the

69. english

Pretend that you writing to the editor of your local newspaper. Your purpose is to convince its readers that rather than solely relying on e-mail, people should mail a letter to their loved ones every now and then. Following is your first draft. Every now

70. math

in a certain geometric sequence, the third term is 8 and the sixth term is 125. what is the first term?

71. biology

lipid soluble must be oxidized before they are excreted from.otherwise the toxins would not be able to pass through the a)bowman capsule b)red blood cells c)cell membranes d)cytoskeleton

72. homework statistics

Consider a random sample with sample mean x. If the sample size increased from n = 40 to n = 360, then the standard deviation of x will: a. remain the same b. increase by a factor of 9 (will be multiplied by 9) c. decrease by a factor of 9 (will be

73. math

the tangent yo the curve y=x^2 +5x -2 @ the point (1,4)intersect the normal to the same curve @ the point (-3,-8) at the point P.Find the coordinates of point P.[ans: -1/3,-16/3] just give me some hint to calculate this solution.

74. physics

how to explain the relationship between the mass of the rotating object and its period?

75. math

a motorist drives to a city in 4 hrs. and returns by another route which is 26 mi. longer. on the return trip he traveled 5 miles per hour faster and took 4 hours and 12 min. . find the length of the shorter route.

76. math

reiny, could you give the motorists two trips another try. it appears you can work it . i'd appriciate seeing an answer. thanks.

77. Math

23 college sophomores at Crocodile Community College, 12 preferred pepperoni pizza, 7 preferred supreme, and 4 preferred cheese. If we picked a college sophomore at Crocodile Community College at random, what is the probability that he or she would prefer

78. Math

Suppose you invest your money into an account that pays 4.0% per year compounded quarterly. How long (in years) will it take for your money to triple? Round your answer to one decimal place. I know I use this... A=P(1+r/n)^nt But to go from there and get

Suppose you invest your money into an account that pays 4.0% per year compounded quarterly. How long (in years) will it take for your money to triple? Round your answer to one decimal place. I know I use this... A=P(1+r/n)^nt But to go from there and get

80. Math

A certain drawing states that the odds of winning are 117:168. What would be the odds against winning? would it be 168/117?

81. Math

The property restoration company PuroServ is considering switching to new dehumidifiers. Their market research, considering the cost of the new machines and their efficiency, tells them that the switch would give them a 54% chance of making a \$20,000

82. Math

The property restoration company PuroServ is considering switching to new dehumidifiers. Their market research, considering the cost of the new machines and their efficiency, tells them that the switch would give them a 54% chance of making a \$20,000

83. Math

A certain drawing states that the odds of winning are 117:168. What would be the odds against winning? Would it be 168/117??

84. MATH

The property restoration company PuroServ is considering switching to new dehumidifiers. Their market research, considering the cost of the new machines and their efficiency, tells them that the switch would give them a 54% chance of making a \$20,000

85. Math

Time Height above ground 0 45 3 65 6 80 9 85 12 80 15 65 18 45 21 25 24 10 27 5 30 10 33 25 36 45 I know the following things: The minimum is 5 while the maximum is 85. amplitude: 85-5/2 = 40 period =360/45 = 8 vertical translation = 5 + 40 = 45 But I

86. chemistry

A sample of metallic element X, weighing 4.315 g, combines with 0.4810 L of Cl2 gas (at normal pressure and 20.0¢ªC) to form the metal chloride with the formula XCl. If the density of Cl2 gas under these conditions is 2.948 g/L, what is the mass of the

87. Fund. of Electronics

What is the peak to peak Voltage across a 10 kilo ohm resistor that dissipates 50 mW?

88. geometry

if 6, 10, and 12, and 9, and x are the lengths of the coresponding sides of two similair triangles, what is the value of x?

89. intermediate algebra

Short answer find the quotient 6x^3-x^2-7x-9 ------------ 2x+3

x+y=4 x-y=2

91. early childhood

need homework help with this question an example of triadic interaction in mexican-american is evident in the statement: a." name the colors in Maria's dress B. Tell grandpa how much you like your new tricycle c. count all the teddy bears d. Let's have

92. biology

(Which of the following would least likely induce thirst) a)Dry pharynx b)Decrease blood volume c)decrease blood pressure d)decreased blood osmolarity

93. college

Advocates of the death penalty recognize that no system is perfect and that applying the death penalty runs a small risk of executing someone who is innocent. Is this a price society should be willing to pay?

94. soc120

Advocates of the death penalty recognize that no system is perfect and that applying the death penalty runs a small risk of executing someone who is innocent. Is this a price society should be willing to pay?

95. chem

A solution prepared by dissolving 20.2 mL of CH3OH in 100mL of water @ 25 celcius. The final volume of the solution is 118 mL. Calculate the % by mass. density CH3OH[0.782g/mL], H20[1g/mL] @ room temp.

96. math

d/dx x(1+y)^(1/2) + y(1+x)^(1/2)=0. Can some1 show me the calculation because i didn't get like the answer. [ans=-1/(1+x)^2 but my calculation=-(sqrt(y+1) (2 sqrt(x+1) sqrt(y+1)+y)/(sqrt(x+1) (2 sqrt(x+1) sqrt(y+1)+x)]

97. biology

lipid soluble toxins must be oxidized before they are excreted from.otherwise the toxins would not be able to pass through the a)bowman capsule b)red blood cells c)cell membranes d)cytoskeleton

98. Math

A community 5K run will award \$50 to the winner. 60 people enter the race, and they each pay an entry fee of \$20. Assuming they are all equally likely to win, what is a fair price for the competition? Round to the nearest cent.

99. Law

why would the "Fleeing Felon Doctrine" be declared unconstitutional?

100. geometry

Use the distance formula and the Pythagorean theorem to find the distance, to the neearest tenth, from R(6,-5) to U(-2,6)

101. economics

The Money Multiplier (MM) is exemplified. Why do you think the FED evaluates the money multiplier when making decisions with regard to the money supply? What function does the money supply serve in our economy to influence certain economic variables? Why

102. careers in early childhood education

Children's behavior is at once specific and: a.)fragmented b.)integrated c.)inappropriate d.)disjointed

103. algebra

factor out the greatest common factor. Please show all work. 15wx-20wy-25wz

104. math

lily left house at 11.43 am and travelled to town, a distance of 31km. She arrived there at 12.09pm. What was the average speed in km/h and m/s.[ans:71.54 km/h & 19.87 m/s] my answer is ~31/1.1=28.18 km/h ~31000/3960=7.83 m/s can some1 show me the

105. math

find 3/5 of 30

106. math

mr. pursley, have you ever worked geo., trig. etcwith no calu.s with the heat on , when it had to be right?wheather you blew up your target or something else or the bld. collapsed or was built in the correct place? i'm not an answer grazer, but qam an

107. algebra

solve by substitution 2x+6y=30 -9x+y=61

Explain how the number of employees in the company affects the company's status if the company is not in compliance. Also explain how federal legislation laws intertwine.

109. english

can you check to see if i identified the verbs correctly and used the correct tense. 1. For as long as I can remember, education has been a constant factor in my life. ( present progressive) 2. I received my first academic award in elementary school and it