Determine whether the function is periodic. if it is, find period.

a. periodic; about 1.5

b. periodic; about 2

c. not periodic.

d. periodic; about 3

I do not think there is a period due to how uneven the amplitudes are.

Hope this helps. (:

-2 is the right

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