Tania

Popular questions and responses by Tania
1. Precal

The number of people in a town of 10,000 who have heard a rumor started by a small group of people is given by the following function: N(t) = 10,000/(5 + 1245e-.97t) 14. How many people were in the group that started the rumor? 15. How many people have

2. Physical science

Find the acceleration of a hamster when it increases its velocity from rest to 10 in 2.4

3. Physics

A hot-air balloon is rising vertically at a speed of 10 m s–1. An object is released from the balloon. The graph shows how the velocity of the object varies with time from when it leaves the balloon to when it reaches the ground four seconds later. It is

4. Chemistry

2C6H14+19O2 (Arrow)12CO2+14H2O 99.01 g of CO2=..........mol of O2? 188.73g of O2=..............g of C6H14?

5. Math

The perimeter of a rectangle is 60cm. It's length is 6cm. What is its width?

6. physics

An athlete runs from one end to the other end of a semicircular track whose radius is 70m. What is the total distance covered by the athlete and what is his displacement?

7. science..physics

An athlete runs from one end to the other end of a semicircular track whose radius is 70m.what is the total distance covered by the athlete and what is his displacement?

8. math

the lenght of a rectangular room is 6 feet longer than twice the width. If the room's perimeter is 132 feet, what are the room's dimensions?

9. eco

2. It has been estimated that the price elasticity of demand for attending baseball games is 0.23. Other things held constant, a 10 percent increase in attendance can be explained by a: A. 43.48 percent fall in the price of a ticket. B. 43.48 percent rise

10. math

show 2 ways of using the distributive property to find the product of 125 times 32

11. math

A student says that a 98% angle has a complement Explain why this is incorrect?

Hydrogen gas was collected in a gas-collecting bottle with a volume of 30.0 mL by water displacement on a day where the temperature was 24ºC and the barometric pressure was 98.125 kPa. The vapour pressure of water at 24ºC is 2.99 kPa. What would be the

13. math help!

f(x) is a quadratic function such that f(1) = 3 and f(5) = 3. Find the x coordinate of the vertex of the graph of f.

14. economics

1. If average movie attendance is 250 million when prices are \$7 a ticket and 200 million when prices are \$9 a ticket, the elasticity of demand for movie tickets is about: A. 0.0. B. 0.9. C. 1.1. D. 1.8.

15. math

Can anyone please help me with the following question: Prove by mathematical induction that 6^n + 4 is a multiple of 5, for nEN.

16. Chemistry

The gaseous product of a reaction is collected in a 25 L container at 27 degrees Celsius. The pressure in a container is 300 kPa and the gas has a mass of 96 g. What is the formula mass of the gas?

17. Calc.

Solve the initial value problem explicity: y'= 5xe^(-y), y(1)=1

18. Calculus

Solve the following initial value problem explicitly: y'= ye^-x , y(0)=1 How do you solve this problem? I'm really confused!

19. Calculus

Ba has a half-life of 283.2 hours. How long would it take for the 50 mg of Ba in a sample to decay to 1.0 mg?

20. Pre-Algebra

help me calculate this - my 6th grade nephew has this question for homework and I'm at a loss. The combined age of 2 people is 91. Person A is two times as old as Person B was when Person A was as old as Person B is now.

21. Climate Change

In a Business 'As usual senario,' global CO2 emissions reach 64 GtCO2 y -1 by 2050. Convert this figure to GtC y-1, and calculate the percentage increase from the level of global CO2 emissions in 2004, estimated as 8.8 GtC y-1. Lets see... carbon is what

22. Math

In the simplest fraction, what part of 4 yd cubed is 3 ft cubed?

23. Algebra

If Anne’s age is represented by the variable a then express Jenny’s age in terms of a if Jenny is three years less than half of Anne’s age

24. Math

Sandy is buying t-shirts for her school's club. Company A charges 5.80 per shirt with no set up fee. Company B charges 5.75 per shirt plus a \$35 set up fee

25. Math

The temperature increased 56 in 4 hours , what was the change in temperature per hour

26. Math

Malik is 10 years less than half his mothers age. I Malik is 12 years old, how old is his mother

27. science

What are psychoanalytical models? How have these models been used to explain human behavior? Which model do you feel is the most effective in explaining human behavior? Why?

28. psy/310

What are psychoanalytical models? How have these models been used to explain human behavior? Which model do you feel is the most effective in explaining human behavior? Why?

29. math

Katepoured 8 ounces of juice of a 64 ounce bottle Brian poor 60 ounces of juice from a 128 ounces bottle what ratio of juice is missing from each bottle of the ratios proportional

30. Math

Find the perimeter of KRN if K(2,9), R(-5,3), and N(0,-7). round to the nearest tenth.

31. math

There are 10 cups of punch left in the punch bowl. Each glass holds 2/3 of a cup.how many glasses can you fill?

32. wilson school

the flag that nico waves has an odd number in the one place and an even number in the tens place

33. Math

if \$15,000 is invested at 6%, compounded quarterly, how long will it be before it grows to \$25,000?

34. information literacy

Which of the following sets of Library of Congress call numbers is in the correct order? A. PA 203 .B252 1971, P201 .A251 1977, PE205 .C253 1954, PH202 .H255 1965 B. P201 .A251 1977, PA 203 .B252 1971, PE205 .C253 1954, PH202 .H255 1965 C. PE205 .C253

35. information literacy

3. Which of the following sets of Library of Congress call numbers is in the correct order? A. E88 G62 L166 1995, E88 G62 L45, E88 G62 D225, E88 G2512 S57 1998 B. E88 G2512 S57 1998, E88 G62 D225, E88 G62 L45, E88 G62 L166 1995 C. E88 G2512 S57 1998, E88

36. chemistry - science

calculate molarity of NaOHin the solution prepared by dissolving its 4g in enough water to form 250ml of this solution ?

37. high school

(x^2y^3/2z)^4

38. geometry

Ab=5 what's the reason ? Ch 2.6 segment proofs

39. Math

Iam re-posting the following questions and would appreciate if anyone could show the working. 1]Find lim sinx/2x x-->0 2]lim 3x^2-4x/7 x-->0

40. Math

Please help me with the two given questions. 1] find lim 3x^2-4x/7 x-->0 2] lim sinx/2x x-->0

41. life orientation

in 10-15 lines critically discuss 5 ways in which the human or environmental problem impacts on the community

42. French

How would you say Ash Wednesday and Easter in French? My French teacher said it today, but I just can't recall what it was now...

43. physics

A system of pulleys is used to lift an elevator carrying a 3,300 newton load. assuming the pulley system is friction free, approximately how far would 10,000 joules of energy lift the elevator?

44. Physics

A braking system is used to prevent the car travelling faster than 27 m s–1.The car and passengers shown in the diagram have a total mass of 750 kg. The length of track from P to Q is 80 m. Calculate the average braking force that would be required if

45. Physics

The work done against a force F(r) in moving an object from r = r1 to r = r2 is integral F(r) dr limits R2 at top and r1 at bottom. The gravitational attraction between two masses m1 and m2 at distance d is given be F=GMM/d2, G = 6.67 x 10-11. Find the

46. Mathematics

You can either do your own yard work or you can pay someone to do it for you. You find that it takes you about 50 minutes to clip, mow, and otherwise clean up your yard each time you do it. You do it four times each month. Also, once a month you need to

47. Math

Time and money are always significant. Look at this scenario. You can either do your own yard work or you can pay someone to do it for you. You find that it takes you about 50 minutes to clip, mow, and otherwise clean up your yard each time you do it. You

48. math

what is the maximum possible nuber of intersection beetween an equalateral triangl and a circle in the same plne?

49. ecology

true or false, the temp. varies greatly throughout the year in a tropical rain forest?

50. ecology

true or false, the temp. varies greatly throughout the year in a tropical rain forest?

51. biology

What phrase does the polypeptide spell? There appears to be some letters missing from the phrase

what leisure activities flourished at the turnof the 20th century

54. Chem Help!

I really need help for my homework on balancing equations please show all the work including the coeffients if needed. I need help with 3 questions, 1) NaN3 -> Na + N2 2) NO2 + O2 -> NO + 03 3) LiOH + CO2 -> Li2CO3 + H2O

55. English

Dangling Modifiers

1. math

i need help on homework

posted on November 16, 2018
2. Math

Alexis bought x boxes of cereal for \$3 each, including tax, and paid with a \$20 bill. Which expression represents the total amount of change she should receive?

posted on August 31, 2017
3. social studies

The answer is c. 20 percent

posted on March 8, 2016
4. Math

Yeah it does

posted on December 11, 2014
5. Math

Yes I do I don't get it

posted on December 11, 2014
6. Physics

A ball is thrown horizontally fron the roof of a building 7.5 tall and lands 9.5m from the base. What was the balls initial speed?

posted on November 24, 2014
7. math help!

posted on March 19, 2014
8. chemistry

¹14 is 1.42e9, 2.36e-10 ¹15 is 7.23e-11, 2.48e-11 ¹16 is 6.89 ¹20 is structure A, decrease, increase Zm is wrong ¹29 is branched structure, branched structure, Linear, because the branches can become more entangled than the linear chain.

posted on December 22, 2013
9. chemistry

9a is LiF

posted on December 22, 2013
10. Chemistry

V1/T1=V2/T2 75+273.15=348.15 -25+273.15=248.15 822/348.15=v2/248.15=586 No, it is not correct because your final answer cannot be a negative answer. :)

posted on May 19, 2013
11. economics

yes

posted on March 10, 2013
12. Biology

population

posted on March 6, 2013
13. Math

Thank you- drwls!!!

posted on August 22, 2011
14. Health Project Ideas

do it on phobias..its unique

posted on November 29, 2010
15. English

Why is mr krabs caring about money than caring about the children?

posted on January 27, 2010
16. Algebra 2

I have the same question. For what value is this equation undefined? and Do the answers to sections a-d match your expectations? why or why not? I'm confused on how to answer this. Please help anyone! Thank you!

posted on January 25, 2010
17. Science

Make a hypothesis about how spacecraft that travel throughthe solar system obtain the energythey need to operate?

posted on November 8, 2008
18. social studies

the egyptians stuffed the nostrils with beeswax durig the mummification process

posted on January 30, 2008