Answer:800
Step-by-step explanation:

and 




Using Z table to get InvNormal(0.9893)=2.30


The formula for area of a circle is:
A=(pi)r^2
If diameter is 5.5, divide by 2 to find radius is 2.75. 2.75^2 is 7.5625 then multiplied by 3.14 (pi) is 23.746.
Depending on how you round, about 23.7 square feet were painted.
Answer:
189
Step-by-step explanation:
ratio is 8:9
multiply ratio by 21 to get 168:189