1. EXAMPLE 4 Evaluate powers
Evaluate the expression.
a. x4 when x = 2 b. n3 when n = 1.5
SOLUTION
a. x4 = 24 b. n3 = 1.53
=2 2 2 2 = (1.5)(1.5)(1.5)
= 16 = 3.375

2. GUIDED PRACTICE for Example 4
Evaluate the expression.
9. x3 when x = 8 10. k3 when k = 2.5
ANSWER
9. 512 10. 6.25

3. GUIDED PRACTICE for Example 4
Evaluate the expression.
1
11. d4 when d =
3
ANSWER
11. 1
81