Answer:
25% .
Step-by-step explanation:
Answer:
49Pi
Step-by-step explanation:
Area of a circle is = to pi(r)^2
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
It looks like you already have a common denominator (y^2-9). So, you can just add the two numerators and put that over the common denominator. Hope this helps!
i dont understand the question
