Use part 1 of the fundamental theorem of calculus to find the derivative of the function. f(x) = 0 x 4 + sec(2t) dt hint: 0 x 4 + sec(2t) dt = − x 0 4 + sec(2t) dt

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)