Answer:
B.) (X2 -x1)(y2 - y1
Step-by-step explanation:
I learned the formula
81 = 9 * 9 = 3 * 3 * 3 *3
8 = 2 * 2 * 2 *2
f(18)=334
V=pi r² h/3
V=volume
R=radius
H=height