Answer:
Please let me know if my calculations were incorrect. I am very sorry but unfortunately, your answer will be negative and not a whole number. None of the answers fit. It is either that I made a mistake or there is something wrong with the question.
Step-by-step explanation:

Answer: 28.26 inches
Step-by-step explanation: C = 2(pie)r or (pie)d
pie rounds to 3.14 the diameter is 9 in. soooooooo. 28.26 in. I don't know if this answer needs to be rounded by there. Have a great day. :)
Answer:
56 and 43
Step-by-step explanation:
(x+13)+x = 99
2x+13 = 99
2x = 99-13
2x = 86
x = 86/2
x = 43
Smaller number = 43
Larger number is 56
Check
56-43 = 13
56+43 = 99