Football practice starts at 5:45 P. M. and lasts for 80 minutes. What time does football practice end?

7:05

Step-by-step explanation:

We start with 5:45.

Add 60 minutes / an hour to get 6:45.

We have 20 minutes left to add.

Add 15 minutes to get 7:00.

Add 5 more to get 7:05.

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

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step-by-step explanation: