The number of subscribers to a streaming video service doubles each week. the function f(x)=2^x represents the number of subscribers in a week x. when are there 64 subscribers? a. week 6 b. week 7 c. week 32 d. week4

1     sepan

2     encuentren

3     tenga

4     hable

5   parezca

6   llegue

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