If a rock climber climbs 60 feet in 4 minutes, what ratio represents the height the climbers ascends per hour?

D

Step-by-step explanation

60/60 = 1

4/60 = 0.066

1 foot would take 0.067 minute which would be 1/15

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

it is 570

step-by-step explanation: