Can someone help with #8

Answer:
Step-by-step explanation:
9)
[tex]Circumference=43.96cm\\\pi \pi*d=43.96\\\\3.14*d=43.96\\\\d=\frac{43.96}{3.14}\\\\d=\frac{43.96*100}{3.14*100}=\frac{4396}{314}\\\\d=14cm[/tex]
10)
[tex]3.14*d=94.2\\\\d=\frac{94.2}{3.14}\\\\d=\frac{94.2*100}{3.14*100}\\\\d=\frac{9420}{314}\\\\d=30mm[/tex]