Janine was working on her homework but lost part of it. She knew that one output of p(r)=2.5^r is 78,000, but she could not remember if p(r) is a
sequence or if it is a regular
function. With your team, help
her figure it out. Be sure to justify your decision.

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

d is the answer

step-by-step explanation:

the answer is b