Given:
The given expression is

To find:
The value of given expression.
Solution:
We have,

Applying the negative exponents rule, we get
![[\because a^{-n}=\dfrac{1}{a^n}]](https://tex.z-dn.net/?f=%5B%5Cbecause%20a%5E%7B-n%7D%3D%5Cdfrac%7B1%7D%7Ba%5En%7D%5D)
Expanding the exponent, we get
The value of given expression is
.
Therefore, the correct option is A.
Answer:

Step-by-step explanation:
= Area of 1st rectangle = 
= Area of 2nd rectangle = 


The number of pounds required for the counter top is


The required expression is
.
Answer:
356.82
Step-by-step explanation: