The temperature in florida was 70 degrees in September after a big heat wave. If the temperature had decreased by 20%, what was the temperature originally in august?

84

Step-by-step explanation:

70 divided by 10 = 7 this would be 10%

multiply that by 2 would = 14/ 20% + 70 = 84

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

7

step-by-step explanation: