Answer:
OPTION A.
Explanation:
Put in simple terms
You're asked to Make "h" the subject.
p=0.7(rh + b)
divide through by 0.7
p/0.7 = rh + b
Rearranging
rh + b = p/0.7
rh = p/0.7 – b
divide through by "r"
h = (p/0.7 – b)÷ r.
Option A is your answer.
Notice that they look similar but you gotta see the difference.
The parenthesis covers all that's being divided by r