Give the radius or diameter. find the the circumference and area of each circle to the nearest tenth. Use 3.14 for pi D= 24ft

A=π×r×r

r=D/2=24/2=12ft

A=3.14×12×12=452.16ft2

C=2πr

C=2×3.14×12

C=75.36ft

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