# Questions Asked onAugust 16, 2017

1. ## Calculus

The marginal cost for producing x units of a certain product is given by the formula MC = 0.001x^2-0.5x+66.5. A. What is the increase in the cost of the production if the production level is raised from 200 to 400 units? B. What is the average cost per

2. ## World history

which of the following most directly resulted from the neolithic revolution? A. populations increased B. complexed cultures blended C. religion became less important D. people relied less on trade My best answer is B is that correct

3. ## Math

Find the savings plan balance after 2 years with an APR of 9% and monthly payments of ​\$200 Can someone help?

4. ## chemistry

Methane (CH4) is the main component of natural gas. It is burned for fuel in a combustion reaction. The unbalanced combustion reaction for methane is shown below. CH4 + O2 CO2 + H2O + heat When the reaction is balanced, how many carbon dioxide molecules

5. ## Math

At age 25 someone sets up an IRA​ (individual retirement​ account) with an APR of 4%. At the end of each month he deposits ​\$85 in the account. How much will the IRA contain when he retires at age​ 65? Compare that amount to the total deposits made

6. ## math

Add or subtract. 1. (–183) + 289 = (1 point) –472 –106 106 472 2. (–10) – 1 = (1 point) –11 –9 9 11 3. 7 – (–8) = (1 point) –15 –1 1 15 4. At noon, the temperature was 12º. It rose 8º during the afternoon, and then dropped 28º by

7. ## science

Imagine yourself making a nice cup of tea on a cold winter day. You begin by boiling some water in a kettle. Next, you add the steaming liquid to your cup. Then, you open a tea bag and repeatedly dunk it into the water. You pour a dash of milk and drop a

8. ## help scott biostats

The proportion of deaths due to lung cancer in males ages 15-64 in England and Wales during the period 1970-1972 was 12%. Suppose that of 20 deaths that occur among male workers in this age group who have worked for at least 1 year in a chemical plant, 5

9. ## Physics

a projectile is launched from a cliff 100m above level ground with a launch velocity angle of 20 degrees above the horizontal What is the horizontal displacement and time upon impact And the max height it traveled

10. ## Math hellppp

the balance listed on kims bank statement was \$65 in April. in may, her balance was \$-12. what equation represents the difference in her account balances from April to may? A. 65-12=53 B. 65 - (-12)=77 (MY ANSWER) C. -65-(-12)= - 53 D. -65+-12 = -77

11. ## Ed tech

what is the most important reason to create a backup of your files somewhere other than your computer? a) to access them on another device b) because your computer may be damaged and you risk losing or not being able to access the file*** c) because your

12. ## Act sps

the ratio of the sum to terms p and q terms of an a.p. is psquare:qsquare. prove that the common difference of the a.p. is twice the first term

13. ## Science

After the experiment, scientists organize and __ the data. (The second letter is an n and the last letter is an e.)

14. ## Physics

An object floats in a liquid of density 1.2 kg/m3 with one quarter of its volume above the liquid surface. Determine the density of the object

15. ## Science

A body is projected vertically upward with a speed of 40 m/s. Find the distance travelled by the body in the last sec of the upward journey taking g = 9.8m/s

16. ## Science

A particle start moving with acceleration 2m/s^2.Distance covered by it in 5th half sec is?

17. ## Math

A rectangular pool is 40 meters long and 30 feet wide. A walkway 3 feet wide surrounds the pool. What is area of the walkaway.

18. ## Maths

Find the interquartile range for a set of data if 75% of the data are above 2.6 and 25% of the data are above 3.7.

19. ## Math

The length of a rectangle is 2ft less than tree times width the area is 60 square ft. Find the length of the rectangle.

20. ## Math scientific expressions

Can someone please explain to me what exactly scientific notations are and what I need to know to solve them properly?? Also, provide worked out examples and explain the steps you followed. PLEASE, no joke responses... I just want a better understanding.

21. ## science

dose the flame of a gas stove emit light

22. ## maths

If a cosA - b sinA = c . Prove that a sinA + b cosA = _+√a^2 + b^2 - c^2

23. ## Algebra

For babysitting, Elissa charges \$3 per hour plus an additional \$2 for transportation. One evening she was paid \$17

24. ## Maths

Please show the method of showing root 42 on number line.

25. ## math

A railroad tunnel is shaped like a semi-eclipse. The height of the tunnel is 28ft and the total width is 50ft. Find the vertical clearance at a point 13ft to the right from the center. Please show all work that leads to your answer. Round your final answer

26. ## science

which items would still be classified in the same way? Which items would be classified differently? • atoms • elements • compounds • molecules • matter please help

27. ## Math

How much time (in hour)does the earth take for1 rotation ? How much time (in hour) would the earth take for 123 rotation?

28. ## Math probabilty

Eric has a spinner that is divided into different colored sections that are the same size and shape. On any spin the theoretical probability of the arrow landing on the red section is 1/5. When Eric spun the arrow x number of times, the arrow landed on the

29. ## Math

Simplify: 8^2 + 9(12 / 3 * 2) - 7

30. ## Math

Mikayla wrote the equation below to calculate y, the total amount of money in dollars she will have saved after she has been saving for x weeks. y = 6x + 80 How much more money will Mikayla have saved after 8 weeks compared to 5 weeks? \$8 \$18 \$98 \$128

31. ## Math

A model of a rail road station has a scale of 1 inch equals 3.5 feet. The dimensions of the model railroad are 34 inches by 18 inches. What are the dimensions of the actual railroad station? 3.5 feet by 18 feet 34 feet by 63 feet 102 feet by 63 feet 119

32. ## Is this correct?

Amy is making scale drawings of different things in her neighborhood. One house she drew is 30 feet wide. Her scale drawing of the house is 5 inches wide. Which of the following uses the same scale Amy used to draw this house? A 54-foot-tall water tower

33. ## Math

21% reptiles, 11% are birds. There are a total of 1,500 animals in the zoo. Is this the correct proportion that I wrote to solve? 21/100=r/1,500*** 11/21=r/1,500 11/100=r/1,500 100/21=r/500 What is the opposite of 62/7? 26/7 -7/62 7/62 -62/7****

34. ## Exponets help quick

What is the simplified form of this expression? 5x(2x(2

35. ## maths

Tebogo counts 190 cricket chirps in a minute.What is the temperature

36. ## Math Shapes

Which figure could result from slicing the cylinder? Choices are ; triangle circle hexagon' octagon Obviously a circle right?

37. ## math

Jaoquin Buys 3 dozen lightbulbs. After changing the lightbulbs in his house, He has 15 left over. How many lightbulbs did he use? Please explain how you got the answer.

38. ## HELP plz

A business owner wants to have a rectangular parking lot resurfaced. The lot is 93 feet long by 58 feet wide. Basesd on a cost of \$2.47 per square foot, the owner incorrectly estimated that it would cost \$12,000 to have the lot resurfaced. Which could be

39. ## math

How do you insert grouping symbols to make this equation true? 9 plus 9 divided by 3 times 5 minus 3 = 12

40. ## Science

Unscrsmble this word atsetlectoicnp

41. ## maths

A pie chart says that there is a number of animals on a farm. If there ARE 55 COWS, 65 GOATS and 50 sheep. How many pigs are there?

42. ## independence university

If a nurse deposits \$12,000 today in a bank account and the interest is compounding annually at 11%, what will be the value of this investment nine years from now?

43. ## Pre algebra

the temperature in canada is -8 degrees. the temperature drops 5 degrees. what is the current temperature?

44. ## Physics0

how to estimate the root mean square speed of hydrogen molecules in the earth's atmosphere in km h^-1? thanks for your help, I'm actually teaching myself physics and that why sometimes I get stuck even with simple questions

45. ## US History, History, Social Studies

Can anyone please help me with my US history writing? I am currently writing a paper related to the US policy in the Middle East. I have to write three policy recommendation to the US. My first idea is "The US step back from the Middle East"... But I'm not

46. ## Physics0

A) What area of a black body kept at 300°C radiates 100W? B) If a 25m2 roof has a U-value of 0.4Wm^-2 °C^-1, how much heat, expressed in MJ, would escape through it over a day if the temperature inside the building was maintained at 7°C above the

47. ## Math

Find the orthogonal trajectory of the family of circle x^2 (y-c)^2 c^2 where c is parameter.

48. ## math

Tell whether the first number is a factor of the second. 9;522 10. 8;508 11. 13;179 12. 17;3,587

49. ## math

Tell whether the first number is a multiple of the second.13;179 17;3,587

50. ## Chemistry

How many N atoms are there in 0.410 mol of NH3? Would it simply be 0.410 x 6.02x10^23?

51. ## Math

A girl spent two fifth of her monthly income for family expense, one third for charity and remaining for saving. What fraction of her income does she save?

52. ## English

I tried to change this sentence to indirect question 3) what was the moment when you finally said I am an Irish rocker but I’m also now fully engaged in this topic? Indirect question He asked Bono what had been the moment when finally you had said you

53. ## Physics

A 14.1kg cart travelling at 15km hr collides with a 23.4 kg cart travelling at 11km hr and the carts stick together. Find the final velocity and the amount of kinetic energy lost in the final collision.