BP Pizzeria sell medium pizzas with a circumference of 28 centimeters and want to enlarge their medium pizza to a circumference of 84 centimeters. What scale factor was used to create the new pizza?

3

Step-by-step explanation:

The scale factor is the ratio by which a size of a thing was increased or decreased so that it can be converted to the size of another thing.

In this case that scale factor is;

= 84/28

= 3

A Scale factor if 3 was used to create the new pizza as the new pizza is the old pizza increased by 3.

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

it is not that hard all u have to do is plot the graph

step-by-step explanation: