A density graph for all possible times from 50 seconds to 300 seconds can be used to find which of the following? A. the probability of a time from 25 seconds to 250 seconds
B. the probability of a time from 150 seconds to 350 seconds
C. the probability of a time from 75 seconds to 250 seconds
D. the probability of a time from 75 seconds to 350 seconds

nothjing

step-by-step explanation:

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