The volume of the prism is 157.5 in3.

Suppose you want to pack the planter completely full with topsoil. It costs $0.02 per cubic inch.

What is the cost of the topsoil?

The total cost of the topsoil to completely full the planter is $ 3.15

Step-by-step explanation:

Volume of the prism = 157.5 cubic inches

Cost of the topsoil per cubic inch = $ 0.02

Therefore, the total cost of the topsoil is:

Volume of the prism * Cost of the topsoil per cubic inch

Replacing with the values we know:

Total cost = 157.5 * 0.02

Total cost = $ 3.15

The total cost of the topsoil to completely full the planter is $ 3.15