Answer:
1/3
Step-by-step explanation:
The inverse is the opposite of a number.
Somebody can estimate the length of a book by using a ruler and rounding it to the nearest whole number.
(b⁷/4⁵)⁻³
= (4⁵/b⁷)³
= 4¹⁵/b²¹
Therefore answer is option b
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Step 4 is wrong. the answer is 1/8, she changed sign on 2^(-3) to 2^(3) without moving it to numerator
