183 is the price after the markup
72 minutes. First convert the height of the pool to inches by multiplying the height in feet by 12 which equals 36. Next multiply that by 2 because the pool is draining at -1/2 inches per minute, not -1 inch per minute.
You can use the prefixes to figure this out:
Mono: one
Bi: two
Tri: three
So, because there is only one term, it is a monomial.
The lines are parallel by the alternate exterior angle converse theorem
