# Parker

Most popular questions and responses by Parker
1. ## chemistry

how many liters of oxygen are necessary for the combustion of 340 g of ethanol (c2h5OH) assuming the raction occurs at STP? no idea how to work this out

2. ## surveying

on a lake without any waves, how far from the shore is a sailboat when the top of 10 m mast disappears from view of a person whose eye height is one m above the water's edge

3. ## trig

P(2, 9) is a point on the terminal side of è in standard position. What is the exact value of tan è?

4. ## History

1. "If slavery is not wrong, nothing is wrong ... And yet I have never understood that the Presidency conferred upon me an unrestricted right to act officially upon this judgment and feeling ... I claim not to have controlled events, but confess plainly

5. ## trig

Two pilots take off from the same airport. Mason heads due south. Nancy heads 23º west of south. After 400 land miles, how far is Nancy from Mason’s route? Round your answer to the nearest tenth of a mile. (Enter only the number.)(If someone had helped

6. ## trig

A water-park slide covers 100 feet of horizontal space and is 36 feet high. A new replacement slide will create an angle with the water surface that measures twice that of the original slide. The new slide will use the same horizontal space as the old

7. ## Stats Question

People were polled on how many books they read the previous year. How many subjects are needed to estimate the number of books read the previous year within one book with 99% confidence? Initial survey results indicate that standard deviation= 15.9 books.

8. ## physics

tom the cat is chasing jerry the mouse across the table surface at 1.5 m high, jerry steps out of the way and tom slides off the table at 5m/s. Where will tom hit the floof and what are the velocity components just before impact

9. ## Algebra

Find the first four terms of the sequence represented by the expression. 3n+5

10. ## Math

The bottom of a picture five feet tall is four feet above the level of an observer's eyes. How far from the wall on which the picture hangs should the observer stand in order that the picture subtends the greatest possible angle at the observer's eyes?

11. ## Social studies

Compare and contrast the rise and fall of Germany and Japan during the period of world war ll - Can someone just comment links to some articles about this tyy

12. ## social studies

What were the mummy-shaped figures that worked in the afterlife's fields for the mummy called?

13. ## Economics

Which is an example of thinking at the margin? A. figuring out what you will give up and what you will gain by hiring a new worker B. thinking about whether or not to go on a vacation to a warm beach C. drawing plans to build an extra room on an old home

14. ## Math

Hayley has 16 square boxes to make an array of rectangular shapes on a grid. Harry says if she uses 19 square boxes she will get more arrays. Do you aree or disagree with Harrys' claim? Explain your answer using prime and composite numbers. Use the

15. ## trig

A hill rises from the horizontal at 15º. The road leading straight up the hill is 800 meters long. How much higher is the top of the hill than the base of the hill? Round to the nearest meter. (Enter only the number.)

16. ## trig

A cashier is unsure whether a group of customers ordered and ate a large or a medium pizza. Medium pizzas have a diameter of 12 inches and large pizzas have a diameter of 16 inches. All that remains is one crust that has an arc length of 4.25 inches. All

17. ## calculus

At noon, ship A is 10 nautical miles due west of ship B. Ship A is sailing west at 17 knots and ship B is sailing north at 20 knots. How fast (in knots) is the distance between the ships changing at 4 PM? (Note: 1 knot is a speed of 1 nautical mile per

18. ## trig

Solve for ¥è in the equation tan ¥è = 2.42 when 180¨¬ < ¥è < 360¨¬. Round your answer to the nearest tenth of a degree. (Enter only the number.)

19. ## calculus

At noon, ship A is 10 nautical miles due west of ship B. Ship A is sailing west at 17 knots and ship B is sailing north at 20 knots. How fast (in knots) is the distance between the ships changing at 4 PM? (Note: 1 knot is a speed of 1 nautical mile per

20. ## Science

Two bumper cars collide and then move away from each other. How do the forces the bumper cars exert on each other compare?

21. ## english

Can someone provide feedback on my intro to a body paragraph? Some say that police brutality is not a big issue in our country at the moment. They say that officers have the legal right to protect themselves and others using their best judgment, and we

22. ## math/compound

Calculate the interest earned on an investment of 2500 invested at an interest rate of 6.15%/a compounded quarterly for 10 years.

23. ## Chemistry

Draw Lewis Structure for BrO3^- The textbook answer involves a central Br atom with one lone electron pair and five shared pairs (two double bonds and one single bonds). This gives Br twelve electrons rather than the typical eight. I understand that some

24. ## History

1. “… to overspread and to possess the whole of the continent which Providence has given us for the development of the great experiment of liberty and federated self-government entrusted to us.” –John O’Sullivan The quote above can be most

25. ## trig

Solve sin ¥è = -0.204 for 90¨¬ < ¥è < 270¨¬. Give your answer to the nearest tenth of a degree.

A hiker shouts toward a vertical cliff 789.5m away. The echo is heard 2.1s later. The wavelength of the sound is 12.3 m. What is the speed of the shout? What is the frequency? What is the period of the wave?

27. ## chemistry

The rate constant of the reaction between CO2 and OH - in aqueous solution to give the HCO3- ion is 1.5 1010 1/(M·s) at 25°C. Determine the rate constant at blood temperature (37°C), given that the activation energy for the reaction is 38 kJ/mol. units

28. ## Statistics

One survey by the American Medical Association showed that among 785 randomly selected people who completed four years of college, 81.7% do not smoke. Use a 0.01 significance level to test the claim that people who completed four years of college are more

29. ## Math

Posted a question on the 2/12/12 at 3:48PM and was never given an answer. Guess the math problem is too hard for anyone to solve. How do they expect me to answer it if no one else can? Thanks for your time. Parker.

30. ## math

The equation below shows how Mandy decides how much juice to buy for a party. In the equation, g is the number of gallons of juice she buys, and t is the length of the party in hours. g= 3t + 5

31. ## chemistry

what is the boiling point of a solution of .01 mole of glucose(C6H22o6) in 200 g of water. kb=0.512C/m.

32. ## Calculus

"Leave the answer as a definite integral, but indicate how it could by evaluated by using the fundamental theorem of calculus." I solved the problem to a definite integral. Proceeding via the fundamental theorem, would involve finding the indefinite

33. ## Chemistry

For the reversible, one-step reaction A + B ARROW C + D, the forward rate constant is 35.9 1/(M·h) and the rate constant for the reverse reaction is 25.4 1/(M·h). The activation energy was found to be 33.0 kJ/mol for the forward reaction and 45.6 kJ/mol

34. ## trig

Alan is using the equation mg sin A = umg cos A to determine the coefficient of friction, u, between a flat rock and a metal ramp. Find u to the nearest hundredth, if the rock begins to slide at 19º.

35. ## spelling

3 adjective words left to unscramble B+U+T+us

36. ## math

12-(-5)+(-11)

37. ## Math

Insert grouping symbols to make each statement true. 4 • 2 - 2 to the power of 2 ➗ 9 + 2 = 6

38. ## maths

The total number of people in a survey is T. The number of males in the survey is x and the number of doctors is y. The number of doctors that are male is z. Write algebraic expressions for the following using any of the variables x, y, z and T. a. The

39. ## Chemistry

I need to calculate the redox potential for the following: 1/2 O2 + 2H+ + 2e- H2O I'm using the formula E = E'_0 + RT\nF ln ([electron acceptor]/[electron donor]) The electron acceptor is H+, so I can use the concentration of that which is indicated by the

40. ## Chemistry

The biomass formula for a yeast is CH1.66 00.269 N0.194. The formula accounts for 92% of dry mass; the other 8% is inorganic material (ash). When grown on C6H14, the yield on biomass is 1.4 gcell/gsubstrate. What is the respiratory quotient (mole CO2

41. ## High School Physics

At rest, a swing is 23.7m above the ground. When Sam performs he always pulls the swing as high as he can to 45.5m. While performing Sam 88.1 kg, is moving pretty fast at his lowest point 23.7m above the ground. What is his kinetic energy at that point?

42. ## Calculus

Water is being pumped into an inverted conical tank at a constant rate. The tank has height 12 meters and the diameter at the top is 4 meters. If the water level is rising at a rate of 26 centimeters per minute when the height of the water is 1 meters,

What is a region, continent, and hemisphere?

44. ## Math (Find the Value)

If 0 < (theta) and cos(theta)=0.5, then what is the value of cos(2theta)?

45. ## Science

The Richter Scale is based on measurements of the ____ of a seismic wave. A. Speed B. Frequency C. Intensity*** D. Amplitude

46. ## Science Ecology

List at least three ways in which Grassland and Tundra biomes are similar.

47. ## Math

A court is 94ft long by 50ft wide.It contains 3 circles, each with a diameter of 12 ft. Two of the circles are located at the free throw line with "half of each circle shaded" and the third circle is at the center. Within the third shaded circle is another

48. ## Math

If tanA = the square root of 11, find tan2A

49. ## English Lit

Describe an obstacle to working on teams. Explain how the team can overcome that obstacle.

50. ## history

Did Washington sign Jay's Treaty (1795) or was it just john jay & british

51. ## History

I have a choice of taking AP history my freshmen yr or Honors, from a tutors point of view, if am getting a 98 in history now, should I take the AP? I know this isn't really hw, but if you can give me any suggestions, I'd really appreciate it! Thanks! It's

52. ## language

okay so what is a good topic that can be put in a 5 paragraph essay in less than 30 min? i need a 100%

53. ## Math

A shaded rectangle is 4ft by 6ft. Within the rectangle is another white rectangle 2 ft by 1 1/2 ft . What is the area of the rectangle that is not white?

54. ## Statistics

A simple random sample of 27 adult mice has a length standard deviation of 0.66 mm. Using a 0.10 level of significance, does it appear that these mice come from a population with a length standard deviation of 0.87 mm?

55. ## statistics

A random sample of 49 credit ratings is obtained, and it is found that they have a (sample) mean of 679.3 and a sample standard deviation of 95.9. Using a 0.05 level of significance, test the claim that these credit ratings are from a population with a

56. ## chemistry

A ground water source contains 2.5 mg of F- ion per liter. a) what is the concentration of F- ions in moles per liter? b) will CaF2 (Ksp = 2E-10) precipitate when the concentration of Ca2+ = 5.0E-3M?

57. ## calculus

Integrate sqrt(x^2 + 1) dx over [0,2*pi] I can substitute u=arctan x to get: Integrate (sec u)^3 du over [0,arctan(2*pi)] From there, I'm stuck. (thanks Count Iblis for your last help)

58. ## trig

Triangle XYZ has vertexes at X(-4, 5), Y(-3, 5), and Z(-3, 4). Find the measure of angle Y to the nearest degree.

59. ## spelling

3 adjective words left to unscramble 1)B+U+T+us 2)c+(what Mrs. Sprat couldn't eat)+a birds home 3)D+pain in the neck

60. ## Math

Here's the direction I was given: Write an expression for the sequence in each table. 1 - 8 2 - 13 3 - 18 4 - 23 5 - 28 n - ___ Would I write n = 28+5 ?

61. ## Algebra

If you have these three origins: (0,0) (0,952) (863,0) How do you find the last point where the two lines intersect? Would really appreciate the help. Thanks. Parker, I'm not quite sure what the question asks. Three origins? Is this standard analytic

62. ## Management Science

1. Modeling is used to: a) Save time b) Save money c) Analyze to the fullest d) All of the above e) A and B, but not C

63. ## Science

you started to run at 10km/h when you left your house and you arrived at school .5 hours later. assuming that your average acceleration was 30 /h2, how fast were you running when you arrived

64. ## calculus

find the definite integral that is equivalent to lim n->infinity of sum over i=(1,n) n/(n^2+i^2) since definite integral of f(x) dx over (a,b) = lim n->infinity sum over i=(1,n) f(a + (b-a)i/n) * (b-a)/n then: f(a + (b-a)i/n) * (b-a)/n = n/(n^2+i^2)

65. ## physics

tiny.cc[slash]cTtCg

1. ## Music

Choral/vocal :)

posted on May 11, 2019
2. ## Music

Vocal and instrumental

posted on May 11, 2019
3. ## math

d

posted on May 8, 2019
4. ## science

posted on March 6, 2018
5. ## algebra

A line of chorus girls.

posted on October 8, 2017
6. ## History

Then is it A?

posted on March 25, 2017
7. ## Art

The correct answers are 1.d 2.a 3.d 4.b 5. B

posted on March 7, 2017
8. ## History

Thank you! :D

posted on February 22, 2017
9. ## History

Manifest Destiny?

posted on February 22, 2017
10. ## Algebra

posted on February 22, 2017
11. ## Social Studies

it was great britain

posted on February 20, 2017
12. ## Ed-tech/History question~!

THX MAN

posted on October 28, 2016
13. ## Physics

Unanswerable without the weight of the car to find its gravitational force and the y-component of its normal force

posted on October 5, 2016
14. ## physics

thats not right. you forgot to square the x value. 0.30 should have been 0.09

posted on December 16, 2015
15. ## Math

I provided the missing information but you have not responded. :=(

posted on May 17, 2015
16. ## Economics

Im gonna go with A

posted on March 31, 2015
17. ## Economics

im stuck between C or A

posted on March 31, 2015

The equation below shows how Mandy decides how much juice to buy for a party. In the equation, g is the number of gallons of juice she buys, and t is the length of the party in hours. g=3t+5

posted on March 25, 2015
19. ## math

Idek I need help!

posted on October 20, 2014
20. ## calculus

f''(x) = 24x - 18 f'(x) = 12x^2 - 18x + C Since f'(1) = -6, then -6 = 12(1)^2 - 18(1) + C -6 = 12 - 18 + C -6 = -6 + C C = 0 So f'(x) = 12x^2 - 18x f(x) = 4x^3 - 9x^2 + C Since f(2) = 0, then 0 = 4(2)^3 - 9(2)^2 + C 0 = 4(8) - 9(4) + C 0 = 32 - 36 + C 0 =

posted on April 15, 2013
21. ## calculus

nevermind, I got it. The trick was using trigonometric reduction formulas.

posted on July 6, 2012
22. ## chemistry

posted on June 12, 2012
23. ## math

the lions ate up all the prophets :D this was a riddle on my math hw

posted on March 30, 2010
24. ## calculus

It still says NOT CORRECT.

posted on September 25, 2009
25. ## physics

Neither do I.

posted on February 1, 2009