Determine the volume
The mayonnaise is sold per unit of volume (in³). Therefore we need to find the volume of the jar to determine the cost. The volume of the jar is equal to the volume of a cylinder.
v = π × r² × h
Input the numbers
v = 3.14 × (1.5)² × 7
v = 3.14 × 2.25 × 7
v = 49.445
The volume of the jar is 49.445 in³
Determine the cost
cost = volume in in³ × the cost per in³
cost = 49.445 × 0.08
cost = 3.9564
to the nearest hundredth
cost = 3.96
The cost of the jar of mayonnaise is $3.96
