Tamara needs to buy motor oil to fill the 3 empty cylindrical barrels at her oil service center. each barrel is 7 feet deep and has a radius of 4 feet. what is the volume of oil needed? use 3.14 for pi.

1055.04 ft³

Step-by-step explanation:

The formula for the volume of a cylinder is

V = πr²h

Using 3.14 for π, 4 for r and 7 for h,

V = 3.14(4²)(7) = 351.68

There are 3 barrels; this gives us

351.68(3) = 1055.04 ft³

341

step-by-step explanation:

all you have to do is 9x31 (which equals 279) and then 20x31 (which equals 620). then you have to subtract. 620-279=341.