1,000 + 50 + 40 + 0.04 + 0.0002 is the number above in expanded notation.
Answer:
819.54 cm^2
Step-by-step explanation:
We are given
Slant height = l = 20cm
and
Diameter = d = 18 cm
We have to find radius first
r = d/2 = 18/2 = 9 cm
The formula for surface area is:

As second option is nearest to calculated answer, it is the correct option ..
-10c+70, just distribute the the -10 to everything in the expression