Select ALL the correct answers. Consider the geometric sequence below. -4, -6, -9, -27/2, -81/2 Select all functions that define the given sequence. f(1) = -4 f(n) = -f(n − 1), for n = 2, 3, 4, ... O f(1) = 4 f(n) = - . f(n − 1), for n = 2, 3, 4, ... (n) = 4.(-3) n = 1

How do i do this activity, is appreciated

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33

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)