Answer:
1280 pages
Step-by-step explanation:
You simply continue the pattern
40 × 2
80 × 2
160 × 2
320 × 2
640 × 2
= 1280
b
9
average =
= = = 9
=1
Answer:126.75 pi
Step-by-step explanation: A= 3/4 X 13^2 pi