The answer is D from picture you posted .
divide the two:
52.50 / 7 = 7.50 per hour
Answer: D. 
Step-by-step explanation:
1. You have the following expression given in the problem above:
÷5
2. By definition, two expression are equivalent when they are the same even though they they are written in a different form.
3. Keeping this on mind, you can rewrite the division of those two numbers as a fraction, as you can see below:

3. Then,
is the equivalent expression to 4h ÷ 5.
Answer:
$71.40
Step-by-step explanation:
Turn the percentage 30 to a decimal, which is 0.3 then multiply it by 238 to get 71.4
None of the answer matches the correct ans
(3.4×10-14)(1.8×10^28)
20(1.8×10^28)
3.6×10^29