Answer:
Step-by-step explanation:
a.
Freshwave- v=lwh v= 8*5*3.5 v= 140cm^3
Happy Fin- v=3.14 * 3.5* 4 v=43.96cm^3
r=d/2 r=7/2 r=3.5
b. freshwave- 90= 140/x x=140/90 x= $1.56per cm^3
Happy fin- 43.96/1.56= $28.18
