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what is an approximate average rate of change of the graph from x=8 to x=13, and what does this rate represent?

There is no rate of change.

x=8 and x=13 are horizontal lines going to infinity and negative infinity, its valid for all reals on those 2 lines.

I'm guessing you left out some information on what kind of interpretation you want of these straight lines.

2nd one in the first row is correct

if the pizza is divided equally into 2 equal halves then you would get

πr^2/2

where r is the radius of the pizza.

happy to

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