Answer:
A= 30
Step-by-step explanation:
A= a+b over 2
h= 5+15 over 2 times that by 3 to get 30
Propecia:
5 gallons ====== $ 14.46.
16 gallons ======= x dollars
X=16*14.46: 5=46.27
Answer: $ 46.27.
i don't know if it is correct or not, sorry if i were mistaken