A. product
b. difference
c. sum
d. product
e. sum
f. quotient
If it is fractions then the answer is -7/15. Think of as 8/15 - 1/15 except the answer is a negative number
I believe answer B is the correct answer
In general for a rectangle of dimensions w by h and a semicircle of diameter w we get an area:

The halfs are because a semicircle is half a circle and a radius is half a diameter.
We're told

Substituting,

Answer: B