Answer:
21/2
Step-by-step explanation:
10.5 is correct, but that's a decimal
21/2=10.5
Answer: the first 1
Step-by-step explanation:
Answer:
530.66 square cm
Step-by-step explanation:
A=pi*r^2
A=pi*13^2
A=530.66
Answer:
7325.34
Step-by-step explanation:
You substitute the equation and see if it works. Also, the first one that you answered is wrong.