Question

Norma earns $22 per hour. She donates 5% of her wages to her favorite charity. If she wants to have at least $748 left after her donation, how many hours (H) must she work? (Round the number of hours up to the next whole hour.)

a. H > 37

b. H > 15

c. H > 36

d. H > 34

Answer 1

i did the math on a calculator and i got C 36.

Answer 2

Conditions
She makes 22 dollars per hour.
Her entire wage = 22*H where x is the number of hours.
5% of that goes to a charity.
When she's taken out the donation, she needs to have at least 748 left

Equation
22*H - 5%(22*H) > 748

Simplification
Take out 22H from both sides of the minus sign
22H ( 1 - 5%) > 748 Change the 5% to a fraction.
22H (1 - 5/100) > 748
22H (1 - 0.5)> 748
22H (0.95) > 748

Solve what is left.
Multiply 22H by 0.95
22H*0.95 > 748
20.9*H > 748 Divide by 20.9
H > 748 / 20.9
H > 35.7 which should be rounded to 36

Answer
H>35.7
H>36 hours (rounded)
C <<<<< Answer