1. Sociology

Soot plays an important role in climate change, but ______ is still the leading cause of Earth's changing climate. A. acid rain B. nitrous oxide C. carbon monoxide D. carbon dioxide I can't decide between B and D

2. math

A spinner with 9 equally side slices 1 white, 1 black, 7 grey, what are the odds in favor of landing on a grey?

3. Calculus

A rectangular box with a square base and cover is to have a volume of 2500 cubic feet. If the cost per square foot for the bottom is \$2, for the top is \$3, and for the sides is \$1, what should the dimensions be in order to minimize the cost?

4. math

A rectangular playground is to be fenced off and divided in two by another fence parallel to one side of the playground. Five hundred and forty feet of fencing is used. Find the dimensions of the playground that maximize the total enclosed area. What is

5. Physics

A person exerts a force of 28 N on the end of a door 84 cm wide. What is the magnitude of the torque if the force is exerted a. perpendicular to the door? b. at a 45 degree angle to the face of the door? c. parallel to the door?

6. Sociology

The tropical rain forest is the most diverse ecosystem in the world. The extinction rates of organisms are on the rise because A. rain forests receive too much rain B. human are destroying the rain forests C. rain forests are not receiving enough rain D.

7. math

A cockroach traveling 2 feet per second takes how long to scurry a distance of 46 feet? seconds

8. Physics

Dahnay Travels On A Bus To School.He Gets On The Onthe Bus Which Then Accelerates From Rest To 18m/s In 20secnds.The Bus Travelr At This Velocity For 60seconds.Tge Bus Slows Down And Comesto Rest In 15seconds.Itis Stationary For 30seconds While People Get

9. Physics

A workman uses a wrench to apply a 100 N force at a distance 0.15 meters away from the center of a bolt. Calculate the torque created by this force.

10. Science

Would heavy snowfall in the ogallala aquifer region affect the recharge of ghe aquifer over the long term?

11. Math [Algebra]

Josh simplified 4x - 8x ÷ 2 and said the answer was -2x. What was Josh's error? What should his answer should've been?

12. Chemistry

Write the net ionic equation for the following reaction : Na3SO4(aq) + Ba(NO3)2(aq) —> BaSO4 (s) + 2 NaNO3(aq)

13. Math

A metalworker has a metal alloy that is 25% copper and another alloy that is 65% copper. How many kilograms of each alloy should the metalworker combine to create 50 kg of a 57% copper alloy?

14. Computer Science JAVA

Project 4 Introduction - the SeaPort Project series For this set of projects for the course, we wish to simulate some of the aspects of a number of Sea Ports. Here are the classes and their instance variables we wish to define:  SeaPortProgram extends

15. physics

A body is executing of amplitude 1m . Its velocity while passing through mean position is 10m/s . Find its frequency

16. Math

The flat fee of a cab is \$3.50 plus an additional \$2.25 every mile. b. Write an equation in slope-intercept, point-slope, or standard form. Explain why you chose the form you did What does that mean?

17. Math

An unmanned aerial vehicle (UAV) carries 45 gallons of fuel. It burns fuel at a rate of 3 gph (gallons/hour) and flies at a speed of 160 mph (miles/hour). We want to fly it to a location X, fly around the area for 1 hour, and then fly it back to the

asked by School123- I posted this before but i did not get
18. Math-Middle School NO FRACTIONS OR DECIMALS PLEASE

A collector has 120 movie posters and 80 band posters. She wants to sell 24 movie posters but still have her poster collection maintain the same ratio of 120:80. If she sells 24 movie posters, how many band posters should she sell? Complete the explanation

19. Math

You write 5 1⁄2 pages of a report in 2 1/3 hours. What is the average number of pages you write per hour?

20. Math

Can someone explain how to use AAS to create a congruent triangle using this "Measure two angles and a side of the triangle not connected to those angles." So I already have two angles one is 25 and the other is 30. Can someone help now I already know one

21. Chemistry

In the 18th century Lavoisier experimented with oxides, such as CO2 and SO2. He observed that they formed acidic solutions. His observations led him to infer that tot exhibit acidic behavior, a substance must contain oxygen. However, today that inference

22. Sign Language

What type of sentence are you signing when you also shake your head back and forth? A:Statement B:Question C:Negative*** A non-manual marker is when you point to something instead of signing it's name....true or false? false*** Are these correct?

23. Accounting

A company is considering replacing an old machine which had an initial cost of \$100,000 and has \$75,000 of accumulated depreciation to date.The company is considering purchasing a new machine which costs \$195,000.The old machine could be sold for

24. Science

What is the primary land use in the ogallala aquifer area of the U.S?

25. math

a hang glider flying in the air is 56 meter from an observation point on the ground. if it is 50 meter along level ground from the observation to a point directly under the glider, how high is the glider?

26. physics

a car is pared on a cliff overlooking the ocean on an incline that makes an angle of 24 below the horizontal. the negligent driver leaves the car in a neutral and emergency brakes are defective. the car rolls down the incline with a constant acceleration

27. nursing ATI maternity test

practice test

28. basic chem HELP

Hello I have a couple questions first is How man grams of Fe(OH)3 can be produced by the addition of .25 moles of Fecl3 to 1.2L of a .85M NaOH solution . I know we use the molarity equation MOlarity= moles of solute/ mass of solvent but i keep gettin gthe

29. Forces Within and Deciphering Earth's History

Which of the following time spans represent the greatest length of time? A. Era B. Eon C. Period D. Epoch my answer is b.

30. physics

Show that the atm.pressure of 1.013x10^5Pa will support (a)10.3m of water (b)760mmHg of Hg.If the density of water is 10^3kg/m3 and density of mercury is 13.6x10^3kg/m3.

31. Chemistry

Using the Krevzi method construct histidine and pyridoxine(Vitamin B6).

32. Chem help

Consider the following system, which is at equilibrium, CO(g) + 3 H2(g) CH4(g) + H2O(g). The result of removing some CH4(g) and H2O(g) from the system will be A. more CH4 is consumed to restore the equilibrium B. Kc decreases C. more H2O(g) is consumed to

33. Math

Meredith worked 5 hours on Tuesday and 7 hours on Friday. Her total gross pay for the week was 72 dollars. How much does Meredith earn in 1 hour? a. Write an equation to represent the situation and solve the equation algebraically.

34. History

All of the following were Union Army objectives leading to the Battle of Shiloh EXCEPT a. the seizure of major rail lines near the Mississippi-Tennessee border b. the continued control of major rivers in the South c. the continued division of the CSA into

35. Chemistry

What is the mass number for a neutral atom that has an atomic number of 33 and 35 neutrons? How do you get the answer

36. Chemistry Basic

Hello I understand How to do empirical problems, but the way this problem is worded has me so confused. when 1.00g lithium metal is reacted with fluorine gas, the RESULTING COMPOUND has a mass of 3.73g. Calc the emprical fromula of lithium fluoride. I know

37. Math

If there are 45 animals in the farm. The ratio of goats: cows: ducks is 5:3:8. If there are 24 ducks, how many of the animals are cows? Pls answer

38. Math

A school has bought 20 desks and 4o chairs at a total cost of 2400. The cost of one desk was equal to the cost of three chairs. How much did a desk and a chair cost respectively?

39. math

Julia's English test score is 11 points more than Juana's, and Juan's English test score is 6 points less than Juana's. Julia and Juan's scores are added to 183 points. What's the test score of Juana? Use the equation to solve the problem. Set the variable

40. physics

A NAL is dropped from rest at a height of 40 m after striking it losses 25% of its energy to what height does it rebound and what is the velocity at the highest point.

41. math

Does ^ mean like 3^4 which I think is 81.

42. Math

what is 420/69

43. math

What is the smallest number that is divisible by the numbers 315, 455, and 875. Can you show me how to get this answer?

44. math

Can an equation be considered standard form if it has more than 3 terms for example is this considered standard form? 21x^3+6x^2-43x+20 also can standard form contain fractions? for example 2x+3+[11/(x-3)]

45. Math

How would I simplify this and then write it in standard form (2x^2 -3x+2)/(x-3)

46. Psychology

Please help! List the dependent variable: Article: Zapata-Phelan, C.P., Colquitt, J.A. Scott, B.A., & Livingston, B. (2009). Procedural justice, interactional justice, and task performance: The mediating role of intrinsic motivation. Organizational

47. Math

The distance from Greg’s house to Tom’s house is 3/8 of a mile. Which decimal represents this distance?

48. Economics

What does Canadian parliament do when it comes to registration? Can someone please explain to me briefly so I understand, thanks in advance.

49. trigonometric identities

sin(pi/2+x)cos(pi-x)cot(3pi/+x)=sin(pi/2-x)sin(3pi/2-x)cot(pi/2+x

50. History

All of the following were Union Army objectives leading up to the Battle of Shiloh except A. The seizure of major rail lines near the Mississippi-Tennessee line B. The continued control of major rivers in the South C. The continued division of the CSA into

51. Geometry

If RS is a midsegment of triangle HIT and parallel to side HI, and RS is 2x + 6 and HI is 5x + 9, write and solve an equation to find the lengths of the segments. How do I go about doing this?

52. Math

A ribbon was cur into twi pieces in the ratio of 3:7. If the shorter ribbon is 21 meters, how long is the longer one?

53. chemistry

Calculate the free energy change of the following reaction (in kJ). 3A^2+ +2B------->3A + 2B^3+ Ecell= 1.66 -(5 mol)*(9.65*10^4)*1.66= -8.0095*10^5 Did I do it right? or is the number of electrons wrong?

asked by i just need to know if im doing it right or not
54. Physics

A pendulum with a bob of mass 150 g has the same period as a thin rod (not massless) of the same mass and length 17 cm when the rod is pivoted about its end. What is the length of the pendulum?