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) = −4t^2 + 20t + 64,
where t is the number of hours since 10 AM,
0 ≤ t ≤ 4.
Find an expression for the revenue per hour R as a function of x??

Answer 1

Revenue per hour = Number of hot dogs sold per hour times 2
or just 2x.