Answer:
the first choice
Step-by-step explanation:

Answer: I think is none
Step-by-step explanation:
Tbh
Answer:
The mean is 20
Step-by-step explanation:
17+19+21+23=80
80 div 4 = 20
Answer:Sorry i have no time to read it all bro
Step-by-step explanation:
C because the formula to find the are of a circle is A=(pi) * radius^2. To find the radius from diameter, just divide by two. So 60/2= 30 so now you can just plug in and 30 * 30 is 900 and 900 * pi, or 3.1415926535, is about 2827