Surface Area of a cylinder 2(π•r²)+(2π•r)•h
So
If the diameter is 8 then the radius is 4. the height is 5.
so you have, 2(3.14•4²)+(2•3.14•4)•5
solve. PEMDAS
Parentheses & Exponents first.
2(3.14•16)+(2•3.14•4)•5
2(50.24)+(6.28•4)•5
2(50.24)+(25.12)•5
Multiplication & Division second (left to right)
100.48+125.6
Add & Subtract (left to right)
226.08cm
We are going to need more contex to awnser this
I think it’s 468 I might be wrong
0.9 as a fraction is:

What place is the '9' in? It's in the tenth place.
0.9 can be said as

Nine

tenths

=
Answer:
4(8-3)
Remember to use PEMDAS if you have to solve :)