The sector COB is cut from the circle with center O. The ratio of the area of the sector removed from the whole circle to the area of the sector removed from the inner circle is R^2/r^2 .

Part a: select all of the ordered pairs that are located on the graph of the equation. part b: does the graph of the equation represent a function? select all correct answers for part a and one answer for part b.

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

Find two consexutive odd integers such that the sum of their square is 650