PLEASE HELP. GOOGLE HAS FAILED ME.
Suppose f(x)=sin(pi cos(x))
On any interval where the inverse function y=f^-1(x) exists, the derivative of f^-1(x) with respect to x is:
A. -1/(cos(pi cos x)
B. -1/(pi sin(x) cos( pi cos(x)))
C. -1/(pi sin(y) cos(pi cos(y))
D. -1/(cos(pi cos(y))
E, -1/(sin(y) cos(pi cos(y))

b

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

answer: the distance

step-by-step explanation:

to calculate the distance d of a line segment with endpoints (x1, y1) and (x2, y2) use the formula d (x2 x1)2 (y2 y1)2. to calculate the midpoint of a line segment with endpoints (x1, y1) and (x2, y2) use the formula