What is the average rate of change for this quadratic function for the interval from x=6 to x=8?

i have not got your picture clearly so see it once again

for this case we have that by definition, the surface area of a cylinder is given by:

where:

r: it is the radius of the cylinder

h: it is the height of the cylinder

we can also rewrite it as:

where:

la: it's the lateral area

ba: area of the base

option a