PLEASE HELP ME WITH THIS ITS MY LAST PROBLEM THANKS

The answer to your question is V = 82.5 in³

Step-by-step explanation:

Data

V = BH

a = 2.75 in

side = 4

height = 3 in

Process

1.- Calculate the area of the base (B)

B = Pa/2

P = number of sides x length of a side

  = 5 x 4

  = 20 in

B = (20)(2.75)/2

B = 55/2

B = 27.5 in

2.- Calculate the volume of the prism

V = (27.5)(3)

V = 82.5 in³

i think the amount would be $140.62

i think it might be a but you might want a second opinion