a spherical balloon is being blown up so that its radius increases at 0.4 cm per sec. Find the rate of increase of the surface area of the balloon when the radius is 20cm​

yeah and the opposite of cheating is studying ( you should try it some time)

step-by-step explanation:

$97520

step-by-step explanation:

add 6% to the value she got from selling the house.

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