Answer:
(14n - 42)*pi
Step-by-step explanation:
Circumference is 2 * pi * r. Since r in this case is 7n - 21, you can multiply r by 2 and pi, giving you (14n - 42)*pi
Answer:
255m^2
Step-by-step explanation:
You multipliy 15 and 34. Then you divide by 2
Answer:
Option D is the correct answer
Step-by-step explanation:
