Answer:
Part a) 
Part b) 
Step-by-step explanation:
we know that
A reciprocal of a rational number
is obtained by changing the numerator and denominator, so the numerator becomes the denominator and the denominator becomes the numerator obtaining 
Part a) we have
200
we know that
the given number can be expressed as 
so
changing the numerator and denominator
The reciprocal is equal to 
Part b) we have
450
we know that
the given number can be expressed as 
so
changing the numerator and denominator
The reciprocal is equal to 
-8/5
Remember "rise over run." Rise means the vertical distance and run id the horizontal between the two points.
I got 480 square feet. I assume that the apartment was a rectangle so the sides were 3in by 5in. Then I converted inches to feet and then found the area again