Answer:
n = 4
Step-by-step explanation:
36 = 13n - 4n
<=> 36 = (13-4).n
<=> 36 = 9n
<=> n = 36 / 9
<=> n = 4
22
Circumference = diameter * pi = 22 * pi
3,089.71
divide 74,153 by 12 and by 2
