Write 64 as a power with exponent 3

Given this information, which expression must represent the value of b?

Define multiplicative inverse. give an example of a number and its multiplicative inverse.

Organic apples are on special for $1.50 per pound. does total cost vary inversely or directly with the number of pounds purchased? find the cost of 3.4 pounds of apples. a. inversely: $5.10 b. directly; $5.10 c. inversely: $2.27 d. directly; $2.27