Question

Find the surface area of the composite figure. Round your answer to the nearest tenth.

Answer 1

To find the surface area of a rectangular prism you're gonna need this:
\[\large SA= 2(wl+hl+hw) \]
\[\large SA = 2( (4*9)+(2*9)+(2*4)) \]
\[\large SA= 2(36+18+8)\]

Then you just add that to the surface area of a circle

Answer 2

*Surface area of a sphere I mean:
\[\large SA = 4\pi*r^2 \]
but since it's half a sphere:
\[\large SA= \frac{4\pi*r^2}{2} \]