Answer:
B) 
Step-by-step explanation:
To find the expression equivalent to
, we must simplify the given expression. This can be done by applying an exponent rule:

In the context of our problem, we would have:

Therefore, when that exponent is distributed, we get:

Simplified, we have:

I am answering the question assuming that you meant that the height was 13 1/2 feet.
Answer = 94.5 square feet
Step-by-step explanation: Area is calculated by multiplying the length x width.
Area = 7 x 13.5
Area = 94.5
That would be <span>50.6, I believe. You multiply 92 by 55% or .55 and get 50.6 </span>
So, we know that a^2 + b^2 = c^2. Right? That is called the Pythagorean Theorem.
In this case. We can say that 39 is a, 40 is b, and x is c.
NOTE: It doesn't really matter whether 39 is a or b. a & b are just the two legs of the right triangle.
So, if we say that 39 is a, 40 is b, and x is c. We can plug it into the Pythagorean Theorem.
39^2 + 40^2 = x^2
I'll let you take it from there.