Help please!! Cofunctions of complimentary angles
cos(34°) = sin(?)

9514 1404 393

  56°

Step-by-step explanation:

Cofunctions of complementary angles have the same value.

  cos(34°) = sin(90°-34°) = sin(56°)

50x5=$250

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