Answer:
7
Step-by-step explanation:
the reciprocal of 
To find reciprocal, flip the top and the bottom.
So
would be
.
Multiply like normal.
Answer:
$633
Step-by-step explanation:
You multiply the 12x15 feet by 31.65
Answer:

Step-by-step explanation:
Given

Consider the numerator:

Consider the denominator:

Hence, the fraction becomes

Consider the expression in brackets:

Divide:

All you have to do is add all of the fractions up.