What is 65 + 78 - 56 - 20 x 10000 - 4567 divided by 72 - 9 + 10 - 56?

Given f(x) = 17-x^2what is the average rate of change in f(x) over the interval [1, 5]?

Pls brainliest will be awarded if answer is correct

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)