SA=4pir^2
SA=4pi13^2
SA=4pi169
SA=676pi ft^2
The expression given is

The sum of the expression will be,

The sum will be
8 groups is what i suppose
Hope this helps!!! ;-)
Answer:
she bought 5 erasers
Step-by-step explanation:
25-5 is 20 and 20 divided by 4 is 5