I need some help with some Math problems?

Question

1. What is the smallest prime number greater than:
32/(1-9)+(-3)squared

2.What is the smallest integer greater than:
-2squared-(-3)squared+(5)(4)/10-(-6)

3. Two sump pumps working at the same rate drain a flooded basement in 5 ½ hours. How long does it take 3 pumps working at the same rate to drain the basement?

4. Find the sum of the three largest unit fractions. (A unit fraction is a fraction in which the numerator is 1 and the denominator is any natural number greater than 1.)

5. Find the sum of the reciprocals of all the whole-number factors of 24.

How did you figure out #4? I am not sure how you answer this question. And also #5.

Answer 1

1. 32/(-8)+9 = -4+9 = 5..next prime is 7.

2. 4-9+20 = 15..so, 16

3. Not sure, but 5.5 * 2 / 3 sounds right, so 3 hours and 40 minute.

4. 1/2 + 1/3 + 1/4 = 6/12 + 4/12 + 3/12 = 13/12

5. 24/24 + 12/24 + 8/24 + 6/24 + 4/24 + 3/24 + 2/24 + 1/24 = 60/24 or 2.5

Hope this helps (and that I'm right)

Answer 2

32/-8 + (-3)^2
-4 + 9 = 5
Ans: 7

(-2)^2 - (-3)^2 + (5)(4)/1 is there more to this?
4 - 9 + 20 = -15
Ans: -14

The pumps drain 1/5.5 of the basement in an hour, or 1/11 of the basement each. Three of them would drain 3/11 of the basement together per hour and would take 11/3 or 3-2/3 hr.

1/2 + 1/3 + 1/4 = 6/12 + 4/12 + 3/12 = 13/13 = 1-1/12

factors = 1, 2, 3, 4, 6, 8, 12, 24
1/1 + 1/2 + 1/3 + 1/4 + 1/6 + 1/12 + 1/24 =
24/24 + 12/24 + 8/24 + 6/24 + 4/24 + 12/24 + 1/24 =
67/24 = 2-19/24

Answer 3

1-answer is 7i think
2-answer is 15 hopefully
3-answer is 1.repetentant 09
4-? i still dont get it
5-answer is 2.5

Answer 4

hire a tutor..............me and algebra DONT get along...........