It is 5 degrees outside and the temperature will drop 4 degrees each hour for the next 3 hours. What will the temperature be in 3 hours?

  -7 degrees

Step-by-step explanation:

The temperature is predicted to be ...

  5 +3(-4) = 5 -12 = -7 . . . . degrees

__

To find the change, multiply the rate of change by the time period. To find the new temperature, add the change to the starting temperature.

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