Question

Suppose a local vendor charges $2 per hot dog and that the number of hot dogs sold per hour is given by
x(t) = −4t2 + 20t + 92,
where t is the number of hours since 10 AM,
0 ≤ t ≤ 4.

Answer 1

Find an expression for the revenue per hour R as a function of x.

Find and simplify
(R x)(t).

Answer 2

unless i miss my guess since it is $2 a dog multiply by 2 to get your answer