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

simply, R(x)=2x as a function of x.