Answer:
In terms of pi: 243[tex]\pi[/tex]
in decimal form: 763.407
Step-by-step explanation:
to find surface area of a hemisphere the formula is,
[tex]3\pi r^{2}[/tex]
diameter (d) = 18
radius = d / 2 = 18 / 2
radius = 9
[tex]3\pi (9)^{2} \\3\pi (81)\\243\pi \\OR\\763.407[/tex]
