The surface area of the above figure is?

A. 301.6 cm²

Step-by-step explanation:

The formula for surface area of a cylinder is

SA = 2πr² + 2πrh      where r is the radius of the base, and h is the height

2πr² represents the area of the  top and bottom circles

2πrh represents the area of the side if it were uncurled.  When uncurled you would have a rectangle.  It is as long around as the circumference of the circle (2πr) and has a given height.  So the length is 2πr, and the width is the height of the cylinder.

We are given r = 4 and h = 8. so we have...

SA = 2π(4²) + 2π(4)(8)

   SA = 32π + 64π

         SA = 96π

            SA = 301.5928947, which rounds to 301.6 cm²

y=x+9

?

step-by-step explanation:

sas (side angle side)

aa(angle angle)

sss(side side side)

sas you have to find two sides with an angle in between

aa you find two angles because it will always add up to 180

sss find all sides

step-by-step explanation: