The train ride at the zoo covers a distance of 1 2/3 miles in 1/6 of an hour.
how many miles per hour does the train go?

The train goes 10 miles per hour

Step-by-step explanation:

1 2/3 divided by 1/6=10

10x1/6=1 2/3

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