1. Chem

Consider the balanced chemical equation: 3Sr(OH)2(aq) + 2H3PO4(aq) → Sr3(PO4)2(s) + 6H2O(l). How many moles of Sr(OH)2 remain if 0.10 mol of H3PO4 react with 0.40 mol of Sr(OH)2?

2. geometry

The line QS bisects

3. trig

A ferris wheel with a diameter of 100 feet rotates at a constant rate of 4 revolutions per minute. Let the center of the ferris wheel be at the origin. 1. Each of the ferris wheel's cars travels around a cirlce. a) Write an equation of the circle where x

4. physics

A 88-kg astronaut and a 1200-kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.25m/s directly away from the shuttle. Seven-and-a-half seconds later the astronaut comes into contact with

5. physics

a ball is dropped from the height. if it takes 0.2 sec. to cross the last 6 m before hitting the ground find the ht. from which it was dropped

6. COM/156

I have a rough draft of an essay that I need revised and checked for comma usage. Would someone be able to look my essay over? To be honest I do not have another person to read over my work.

7. math modeling

Person A opens an IRA at age 25, contributes \$2000 per year for 10 years, but makes no additional contributions thereafter. Person B waits until age 35 to open an IRA and contributes \$2000 per years for 30 years. There is no initial investment in either

8. Math

Prove the identity: cosx/1-tanx +sinx/1-cotx

9. statitics

Assume the body temperatures of healthy adults are normally distributed with a mean of 98.20 °F and a standard deviation of 0.62 °F (based on data from the University of Maryland researchers). a. If you have a body temperature of 99.00 °F, what is your

10. Math

A ramp 10 feet in length rises to a loading Platform that is 4 feet off the ground. What is the angle of elevation of the ramp in degrees? Do I use the law of cosines? When I do though I'm getting a little confused what to do.

11. Physics

a 35 g ice cube at 0.0 C is added to 110 g of water in a 62 g aluminium cup. The cup and the water have an initial temperature of 23 C . Find the equilibrium temperature of this system? in Celsius ,, I've been trying to solve this for 2 hours now , and I

12. statistics

Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of scores less than 100 b.

13. Statistics

Construct the probability distribution for the value of a 2-card hand dealt from a standard deck of 52 cards (all face cards have a value of 10 and an ace has a value of 11). a) What is the probability of being dealt a hand that adds up to 21? b) What is

14. CHEMISTRY

At 285mmHg +25 degrees celsius,a gas sample has a volume of 2270ml. what is the final pressure in mmHg at a volume of 1250ml and a temperature od 175 degrees celsius?

15. math

Explain how you could use the Pythagorean Theorem to find the distance between the points the coordinate pair negative four comma negative three and the coordinate pair one comma one. Find the distance. You can type carat two to indicate "squared" and

16. bio

If the frequency of one allele in a population is 0.7, what is the frequency of the alternate allele? A) 0.30 B) 0.21 C) 0.42 D) 0.09 E) 0.49

17. Finance

Benson Incorporated has bonds with the following features: Par value of 1,000, maturity of 12 years, and a coupon rate of 8%.The yield to maturity is 10%. Pleases determine if the bond sells for for a premium, par, or discount and explain your answer.

18. kkkkk

Find the amount of compound interest earned in an account that opens with \$27,000, earns 4.6% interest compounded daily, and is held for 15 years. Assume 360 days in a year. (Round your answer to the nearest cent.

19. trigonometry

sin2 =2tan cos

which audience has political,social or economic power,pays close attention to the transaction between you and the primary sudience and my base future actions on its evaluation of your message

21. trigonometry

sin2 =2tan cos

22. Statistics

A new screening test for a disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% (240) and 70%, (280) respectively. Four hundred (400) people are screened at a clinic during the first year the new

23. english

1) i don't if these entences are good. The poet tells his audience to not mourn after his death, because he is going to his permanent home, heaven. 2) Thus, the poet is conceptualizing that even if you die you would always meet your family and friends in

24. bio

the biome with the fewest seasonal changes is the

25. math

three boxes are in a room. You know that one contains apples, one centains oranges, and one contains a mixture of apples and oranges, but you don't know the contents of the specific boxes. The boxes are labeled "apples","oranges", and "apples and oranges",

Chapter 14 Case – “Hewitt-Packard Company” Need ideas for case study paper, any ideas?

27. computers

can we create two variables of same name and of different datatype?

28. gp school

calculate the molarity of a solution when 5g of urea is dissolved in 600ml of water

29. math

in the triangle ABC,AB=3 BC =4 CA=2.D is the point on CA such that AD bisects angle A.M is the mid point of CA.F is a point on AB such that angle AFD=90. DF and am meet at the point E.Then AF:FB=?,DE:EF=?

30. mathsP5

There are 2 packets of flour, Y & Z.The ratio of the mass of Y to Z is 4:1. If 26g is added to Z,the ratio of the mass of Y to Z is 7:5. Find the mass of the 2 packets at first. Pls show how to solve by model method as i have not learnt algebra. tks

31. math

Prove that (secx+tanx)^2=1+sinx/1-sinx Thanks in advance.

32. Math

If the bisector of the vertical angle of the triangle bisects the base prove that the triangle is isosceles?

33. stat

A company’s CEO wanted to estimate the percentage of defective product per shipment. In a sample containing 500 products, he found 30 defective products. (a) Find a 98% confidence interval for the true proportion of defective product. Show your

34. Statistics

The notion of statistical significance is frequently used in business to distinguish between true and spurious between-group differences (such as a difference between the response rates to two different promotions). Hence, when the difference between the

35. math

What happens to the mean, median and mode for the data shown if the outlier is eliminated? 8 3 5 3 23 4 7

36. statistics

1. Which of the following statements are correct? a. A normal distribution is any distribution that is not unusual. (True/False) b. The graph of a normal distribution is bell-shaped. (True/False) c. If a population has a normal distribution, the mean and

37. math

is 49 a perfect square? can you please explain.

38. Statistic

Indicate whether the given statement could apply to the data set consisting of 1000 values that are all different. 1. The 29% is greater then the 30 th percentile. 2. The median is greater then the first quartile. 3. The third quartile is greater then the

39. human service

Can you tell me if I am correct or not. Arbitration is used to help resolve a issue between two parties. The parties can submit their dispute to an third party and the arbitrator will consider all the facts and render a judgement? If I am correct, can you

40. geometry

simplify completely -2 (2x + y) -7x + 2y?

41. math

2. Maryam pays \$3000 on the 30th day of a \$7,000, 120-day, and 8% loan. a. What is the adjusted principal after the partial payment is made if ordinary interest is applied? (5 points) Answer: b. What is the adjusted balance due at maturity? (5 points)

42. english

I have a feeling that my sentences are very bad. can you please correct them. the three senetnces are based on the poem "crossing thebar" by alfred tennyson. 1) The reason why the ship comes out from the boundless deep is because the ship symbolically

43. Math

Write the following without negative exponents: (a^-1 + b^-1)^-1

44. chemistry

1.what is the volume of NaCl in cubic cm and cubic nm if the Length is 0.563 nm? 2. the density of NaCl is 2.17 g/cm. What is the Mass? 3. Each repeating unit is composed of 4 NaCl molecules. What is the Mass of 1 NaCl molecule?

45. trig

(sec theta + cosec theta) (sin theta +cos theta) = 2 + sec theta cosec theta

46. math

1. Prove the identity:cosx/1-tanx+sinx/1-cotx=sinx+cosx 2.Prove the identity: cosx/1+sinx+1+sinx/cosx=2secx

47. Maths

60% of the people on a bus are male. After 1/3 of the males alighted from the bus, what percentage of the people left on the bus are females?

48. maths

there are 15 guppies, 14 angelfish and 5 goldfish in a tank. how many guppies and goldfish must be added so that the ratio of guppies to angelfish to goldfish is 9:7:5

49. Am. History

Immigration was a hot topic during this time period (1820-1850), and it remains a hot topic today. In what ways does immigration continue to shape our nation? can anyone "get the ball rolling" for me. not looking for an answer, just a starting point. maybe

50. math

The domain of g(f(x)) where f(x)=x+4 and g(x)=sqrt(x) is?

51. HCA/210

i need help with a 200-300 word on the rising health care costs

52. science

I HAVE WRITTEN A MITIGATION PLAN AND WANTED TO KNOW IF SOMEONE WOULD READ IT A GIVE ME FEED BACK AS TO WHAT I CAN CHANGE Energy Conservation Mitigation Plan Humans are not making energy conservation a priority. Spending a day without energy will be a hard

53. Biology

Hypothesis on finding if the dissappearance of a particular fish species from a lake in the northwestern united states is due to acid rain resulting from industrial air pollution

54. statsitsc

b. The graph of a normal distribution is bell-shaped. (True/False)

55. english

how can i make this sentece better If so the boat figuratively seems to be the transportation to heaven. Given that death is experienced alone the next line, “one clear call for me”, endorses that the poet was depicting the scene of passing away and

56. math

divide 44/16.5

57. social psychology

Does a person's self-efficacy changes as their personalities develop and they learn new information. Does failure necessarily reflect on the people we are. Does being motivated to learn new things and do better in all aspects of our lives helps our

58. algebra

How to put this math problem in power point presentation. Evaluate both expressions by using R= 120 and s = 200 : Find the LCD of the terms in the equation.

59. geography

explain indias drianage system

60. Maths

There are 2 packets of flour, Y & Z.The ratio of the mass of Y to Z is 4:1. If 26g is added to Z,the ratio of the mass of Y to Z is 7:5. Find the mass of the 2 packets at first.

61. social psychology

Explain how a college education will change or modify your self-schema.

62. chemistry

why we just see a light spot of benzaldehyde after tlc in iodine chamber which soon vanishes and does not appear again?

63. trigonometry

sin2 =2tan cos

64. math

The number of real solutions to the system of equations y=2sin(x^2) and y=x^3-x is a. 0 b. 1 c. 2 d. 3 Please show your work! Thank you!

65. Maths

What is the ratio of boys to girlr if there are 6 boys and 12 girls in a class

66. Math

Simifly the ezpression 8d^2 + 3d + 7d^2 - 6d

67. statistics

A normal distribution is any distribution that is not unusual. (True/False)

68. math

divide 44/16.5

69. algebra

x = 3 a solution for 3x – 1 = 6? Write yes or no.

70. alebra

Solve using the addition principle. x + 1 = 7

71. science

chemical formula

72. Maths

There are 2 packets of flour, Y & Z.The ratio of the mass of Y to Z is 4:1. If 26g is added to Z,the ratio of the mass of Y to Z is 7:5. Find the mass of the 2 packets at first.

73. Algebra

Help! sin B = ( 5 square root 2)/ (5 square root 3), find the value of csc B

74. chemistry

what weight of sodium hydroxide(NaOH) is required to make 20ml of 5% (w/v) sodium hydroxide?

75. algebra

simplify the expression (x+3y-5z)-(x-2y+3z)

76. math

a single card is drawn from a deck. find the probability of selecting a 10 or a diamond.

77. science

Author Donald Kennedy thinks it is possible to find environmental solutions that are risk-free.