Parallel lines r and s are cut by two transversals, parallel lines t and u. Which angles are alternate interior angles with angle 3?
A) 5 and 13
B) 7 and 15
C) 6 and 16
D) 8 and 14

7 and 15 are alternate interior angles with angle 3.

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