1. statistics/ Help!-thanks!

The producers of a new toothpaste claim that it prevents more cavities than other brands of toothpaste. A random sample of 60 people use the new toothpaste for 6 months. The mean number of cavities at their next check up is 1.5. In the general population

2. Chemistry

Suppose you have a strong peak at 2230 cm–1. What is the wavelength of the radiation that was absorbed?

3. math

How many edges are in K15, the complete graph with 15 vertices. Any help would be appreciated, thanks.

4. Chemistry IR Spectroscopy

Sort the compounds: conjugated or non conjugated. -but-2-enoic acid -butanoic acid -hex-4-en-3-one -hexan-3-one

5. accounting

A company purchased a machine on January 1 of the current year for \$750,000. Calculate the annual depreciation expense for each year of the machine's life (estimated at 5 years or 20,000 hours, with a salvage value of \$75,000). During the machine's 5-year

6. math (statistics)

the set of integers between 1 and 50 divisible by 8

7. physics

Hi, ive been trying to get this problem for a couple of days now but i have no idea of what to do. A very slippery block of ice slides down a smooth ramp tilted at angle pheta. a)The ice is released from rest at vertical height h above the bottom of the

8. Physics

Standing on the top ledge of a 55 m high building you throw a ball straight up with an initial speed of 45 m/s. How long to the nearest second, does it take to hit the ground? I got 10 seconds for the first question. How do I go about answering this one?

9. Science

I not sure what formula to use for KE or how to find the mass for the equation. Water is flowing through a 2-inch diameter pipe with a velocity of 3 ft/s. Part A What is the kinetic energy of the water in (ft)(lbf)/(lbm)? (lbf) pound force (lbm) pound mass

10. physics

a transformer has 200 turns in its primary coil, the potential difference across the transformer is 220V needs to operate an electrical instrument uses a 110 volts. the number of turns in its secondary coil is: a) 100 turns b) 200 turns c) 110 turns d) 220

11. physics

A tortoise can run with a speed of 11.5 cm/s, and a hare can run 21.4 times as fast. In a race, they both start at the same time, but the hare stops to rest for 126 seconds. The tortoise wins by a shell (18.3 cm). How long does the race take? What is the

12. Stor 155

a data set lists apartments available for students to rent. Information provided includes the monthly rent, whether or not cable is included free of charge, whether or not pets are allowed, the number of bedrooms, and the distance to the campus. Describe

13. College Math

A club consists of 16 men and 19 women. In how many ways can they choose a president, vice president, treasurer, and secretary, along with an advisory committee of six people? (Round the answer to five decimal places.) The Answer is blank x 10 to the 11th

14. chemistry

What hybrid orbitals are used by nitrogen and phosphorous atoms in the following species? (a) NH3, (b) PCl4+, (c) H2N-NH2

15. math (statistics)

an experiment consistbnof tossing a die and then flipping a coin once if the number on the die is even. If the number on the die is odd, the coin is flipped twice. Using the notation 4H, for example to denote an event that die comes up 4 and then the coin

16. College Math

Find the amount of interest and the monthly payment for the loan. Purchase a living room set for \$3,400 at 12% add-on interest for 5 years. (Round your monthly payment to the nearest cent.)

17. visual basic 2010

Assuming the ocean's level is currently rising at about 1.5 millimeters per year, create an application that displays the number of millimeters that the ocean will have risen each year for the next 10 years.

18. Chemistry

The total volume of seawater is 1.5 times 10 to the twenty- first power L. Assume that seawater contains 3.1 percent sodium chloride by mass and that it's density is 1.03 g/mL. Calculate the total mass of sodium chloride in kilograms and in tons. ( 1 ton =

19. physics

On your wedding day your lover gives you a gold ring of mass 3.68 g. 54 years later its mass is 3.28 g. On the average how many atoms were abrated from the ring during each second of your marriage? The atomic mass of gold is 197 u.

20. science

when a zinc is placed in a copper(ii)nitrate solution,the strip becomes coated with copper.write down the oxidation half reaction for the reaction that takes place.

21. Statistics

An instructor has graded 25 exam papers submitted by students in a class of 26 students, and the average so far is 71. (The maximum possible score is 100.) A) To raise the class average by 1 point, the score on the last paper has to be:

In a fume cupboard molten lead(ii) bromide is electrolysed using graphite electrodes. Write half-equations for the reaction at the (i).cathode (ii). Anode (iii). Overall equation (states required).

In a fume cupboard molten lead(ii) bromide is electrolysed using graphite electrodes. Write half-equations for the reaction at the (i).cathode (ii). Anode (iii). Overall equation (states required).

24. Physics

a body (A) is moving with a speed of 250m/s in the positive x-direction, collides with body (B) initially at rest and having the same mass as (A). after collision the speed of body (A) is 100m/s making 30 degree with the horizontal. the speed and direction

25. Chemistry

An aqueus solution of sodium mitrate(NaNO3) contains 0.85 grams of sodium nitrate and its concentration is 0.1mol L^-1. What is the volume. in millilitres, of the sodium nitrate solution?

26. math

STATISTICS The mean score for samantha's first s algebra quizzes was 88. If she scored a 95 on her next quiz, what will her mean score be for all 7 quizzes?

27. accounts

The differences between the book basis and tax basis of the assets and liabilities of Castle Corporation at the end of 2008 are presented below.  It is estimated that the litigation liability will be settled in 2009. The difference in accounts receivable

28. English

1. I cleaned and ironed my little brother's clothes and sold them all. (Does the sentence mean "I" washed the clothes? Or without washing clothes, did I clean the state of the clothes?) 2. Last Saturday, I sold some of my mom's old dresses. For the whold

29. geometry

I"m stuck on this question "Rays PQ and QR ae perpendicular.Point S lies in the interior of angle PQR.If angle PQS!=4+7a and angle SQR=9+4a,find angle PQS and angle SQR. PLEASE HELP!!!!

30. ENGLISH

Give two examples of each of the following elements of poetry from the poems you have read in Units 4, 5, and 6

asked by Give two examples of each of the following element
31. Chemistry

Balancing Equation Al2C3O3 + H3PO4 --> AlPO4 + CO2 + H2O

32. math

16^2-25/5+6(3)4= i having trouble,been on this problem for a while need help and understanding of how the answer 323 when i keep coming up with a lower number. hhelp

33. math

From a survey of 100 college students, a marketing research company found that 70 students owned iPhones, 45 owned cars, and 40 owned both cars and iPhones. (a) How many students owned either a car or an iPhone (but not both)? 1 students (b) How many

34. math

The campus vets club is having a raffle and is selling 2,800 tickets. If the people on your floor of the dorm bought 588 of those tickets, what is the probability that someone on your floor will hold the winning ticket? (Enter your answer as a decimal.) 1

35. math

write inequality of the form |x-a|

36. math

find the derivatives, dy/dx for the folowing function : y=ln(cos(0.5)+(sin(x^2+3))^1/3)

37. Ethics

THe gm of a software company is in the process of constructing a new facility in a country. THe gm has a manager of native origin acting as liaison between the company and government officials. THe new facility requires some permits and licenses.

38. Physic

One gallon of paint (3.79 Liters) covers an area of 26.0 m2. What is the thickness (in mm) of the fresh paint on the wall. Please help, I have no idea where to start thank you!

39. medical

medical billing DX for head pain possible cyst

40. math

Use Venn diagrams to check the validity of the argument. All bachelors are handsome. Some bachelors do not drink lemonade. Therefore, some handsome men do not drink lemonade. 1 ---Select--- valid not valid All squares are rectangles. All rectangles are

41. geometry

I'm having a hard time with this question: "AB has endpoints A(n,4n) and B(3n,6n). Which of the following is true? A. AB=4n B. The midpoint of AB is (2n,2n). C. AB=n√8 D. The midpoint of AB is (4n,10n)". PLEASE HELP!!!!!

Sort the pairs of related compounds by their carbonyl stretching frequencies in cm–1. (There will be three compounds per bin.) Bin # 1: Slightly higher Bin #2: Slightly lower Compounds: -butanol -but-2-enal -heptan-3-one -hept-4-en-3-one -cinnamaldehyde

43. math

annie,betty,Cathy and Danial are going to stand on a row for taking pictures. How many ways can they stand?

44. Info literacy

Which of the following sets of Dewey Decimal call numbers is in the correct order? A. 010.1 ABR, 004.15 KWA, 100.01 PRO, 100.1 BLU B. 004.15 KWA, 010.1 ABR, 100.01 PRO, 100.1 BLU C. 100.1 BLU, 010.1 ABR, 004.15 KWA, 100.01 PRO D. 100.01 PRO, 100.1 BLU,

45. geometry

I need help with this question. "The measure of the supplement of an angle is 60 less than three times the measure of the complement of the angle.find the measure of the angle". Please help!!!!

46. Physics

can you please help me in telling me the uses of each electromagnet wave? like explain each briefly and what are they used for? thankyou

47. math

Determine the down payment and the amount to be financed for each home described below. (a) \$360,360; 10% down The down payment is \$ 1 The amount to be financed is \$ 2 (b) \$960,000; 20% down The down payment is \$ 3 The amount to be financed is \$ 4 Don't

48. chem

what is the symbol for the element that has 78 protons 76 electrons 117 neutrons and a +2 net charge? i thought it was ^195Os^+2 but that is wrong. Thanks for the help!

49. Science

Why is the energy released to break a triple bond not three times the energy to break a single bond?

50. math

round 0.8394263 to the nearest hundred-thousndth. Add the fractions 2/3,3/8 and 5/12 reduce to lowest terms subtract the fraction 7 4/ from 18 6/15 reduce answer in lowet terms

What is the MAIN reason for storing sodium metal in mineral oils?

52. algebra

x 2/3-16x 1/3 +64=0

53. math

let theta be an angle in quadrant three such that tan theta =6/5

With regards to the mining and agriculture industry, in the nineteenth century, which of the following statements is false? A. Large companies tried to be paternalistic to keep workers from rebelling B. Specialization became more common C. Private

55. Physiology

Palpation of the left axillary region demonstrated palpable lymph nodes extending into the ipsilateral anterior thorax. ( Does ipsilateral refer to the axillary ( armpit), meaning the anterior thorax is on the same side as the axillary (left)? ( Must be

56. Math

A two population model is satisfied by a system of differential equations given by, V(x,y) = (ax,by)^T The general solution of the system of differential equations has x = áe^at for some constant á. The parameter t can be eliminated and we can express y

57. physics

what are convex lenses?

58. math

In a recent survey of 100 women, the following information was gathered. 39 use shampoo A. 42 use shampoo B. 48 use shampoo C. 14 use shampoos A and B. 15 use shampoos A and C. 12 use shampoos B and C. 8 use all three. Use the figure to answer the question

59. chemistry

If 0.7825 g of solid Al and 450. mL of 0.2069 M aqueous Cl- are reacted stoichiometrically according to the equation, what mass (g) of solid Al remained? 3 CuCl2(aq) + 2 Al(s) ¨ 3 Cu + 2 AlCl3(aq)

60. Physics

The relative density of mercury is 13.6. Find the ratio of the mass of mercury of a certain volume to that of water having tem times the volume of mercury

61. English

In addition to the Center for Writing Excellence, what other writing tools might you rely on for revising a research paper?

62. Math

Given the formula Xc=1/6.28fC, find C if Xc =500 and f=2000. What are the rules that take me from 500/1 = 1/6.28*2000*C to the next step of: C=1*1/500*6.28*2000 ?

63. Structured English Immersion

How can the continuum of strategies be used inappropriately in the classroom?

64. math(ODE)

there are 3 linearly independent solutions of the DE t^3.y"'+3t^2.y"-6ty'+6y=0 of the form t^p, find the possible values of p

65. Chem

Sort the pairs of related compounds by their carbonyl stretching frequencies in cm–1. (There will be three compounds per bin.) Bin # 1: Slightly higher Bin #2: Slightly lower Compounds: -butanol -but-2-enal -heptan-3-one -hept-4-en-3-one -cinnamaldehyde

66. math

In a restaurant, a man ordered soup for \$3, an appetizer for \$4.25 dinner for 17.90,a beverage for \$1.50, and dessert for \$3.75. He left the server a 15% tip. what was the totl cost of the man's meal, including the tip?

67. economics

what are some mesoeconomics variables/indicators

68. science

heat energy is measured in unites of

69. speech

I need help with where to look for an answer to this question: That no people can see the same thing because the statement is self-discrediting, if the statement were true the person making the statement would have no way of knowing that it is true since

70. prinicples of management

Scenario: Assume you are the owner-driver of a truck, which transports vegetables overnight from the farmers in Florida to the markets in Atlanta. On the way back you haul whatever goods need transporting in the opposite direction. You have five employees

Ethanol is produced by the action of yeast (catalyst) on sugar cane juice. (1).What is specific name of this reaction? (2.) Write a simple word equation of this reaction.

Ethanol is produced by the action of yeast (catalyst) on sugar cane juice. (1).What is specific name of this reaction? (2.) Write a simple word equation of this reaction.

73. math

Determine the comparable interest rate for a \$50,000 loan when the quoted information is 11.8% + 0.5 pt + \$300. (Round your answer to two decimal places.) 1 % i came up with the answer 8905%

74. math (statistics)

A costumer has to buy a cell phone from an appliance store with 8 different brands. Each brand is available in 5 different colors, and 7 origins. how many choices can the sales lady offer the costumer?

75. Maths

Solve this using elimination method: 4x-3y=-4

76. math (statistics)

how many 4 digit number can be formed from the digits 2,3,5,,6,7,8 if: a.)each digit be only used once b) how many are even? c) how many are odd? d) how many are greater than 25000?

77. statistics

7. (TCO 6) Find P(11 < x < 16) when mu = 15 and sigma = 3. (Points : 3)

79. physics

if two waves mix while moving, will one delay the other? a) yes b) no c) sometimes d) only for sound waves

80. physics

how to find the tension in a rope when we know that the weight of the body attached to the rope is 50 newton? if there is a formula for that can you please tell thankyou

81. College Math

Evaluate the expression. (8 7) however the () should cover both numbers. Please explain answer if poss.

82. Physiology

The patient reports numbness and tingling in the left lumber area and pain in the contralateral femoral region. ( not sure how to rewrite statement into simpler terms)

83. statistics

how many ounces of butt woulld one have used if you use 81% out of countainer of 1.45kg of butter

84. math

Determine the comparable interest rate for a \$50,000 loan when the quoted information is 11.8% + 0.5 pt + \$300. (Round your answer to two decimal places.) 1 % I don't understand how to do this problem

85. physics

An object is moving at constant velocity of 20m/s for 10 seconds. Find the acceleration during the 10 seconds interval?

86. moral science

chart work for effects of pure and impure water

87. accounting

The City of Allentown recently received a donation of two items: A letter written in 1820 valued at \$24,000 from James Allen and 1920 painting of the town's city hall, painting by same artist sold recently for \$4,000.How do I do a journal capitalizing