Pls help me pls

Step-by-step explanation:

Volume of the cylinder

Givens

h = 30-10 = 20

d = 20

r = d/2 = 20/2 = 10

Formula

V = pi r^2 h

Solution

V = 3.14 * 10^2 * 20

V = 6280

Volume of the cone

Givens

h = 10

d = 20

r = d/2 = 20 / 2 = 10

Formula

V = 1/3 pi r^2 h

V = 1/3 * 3.14 * 10^2 * 10

V = 1046

Total Volume

V_cone + V cylinder

V = 1046 + 6280

V = 7326.7

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.