On weekday mornings, it takes Leo 12 minutes to bike 2 miles to his school. This
Saturday, Leo will bike to the park to meet his friends. The park is 5 miles away from Leo's
house.
If he bikes at the same rate, how many minutes will it take Leo to get to the park?

30 mintues

Step-by-step explanation:

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204