Question

Elvaluate b^-3 for b=3
A. 27
B. 1/9
C. 1/27
D. -27

Answer 1

Answer: C 1/27

b^-3 and b=3

So we have 1/b^3= 1/3^3= 1/27

Answer 2

C

Explanation:

Using the rule of exponents

•
`b^(-m)` ⇔
`(1)/(b^(m) )`, thus

`3^(-3)` =
`(1)/(3^(3) )` =
`(1)/(27)` → C