Represent the geometric series using the explicit formula.

3, -6, 12, -24,

a.) f(n) = 3 • (2)^(n-1)
b.) f(n) = 3 • (-2)^(n-1)
c.) f(n) = f(n - 1) • (2)
d.) f(n) = f(n - 1) • (-2)

The holiday party will cost $160 if 8 people attend. if there are 40 people who attend the party, how much will the holiday party cost

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)

If two points are given, then exactly one line can be drawn through those two points. which geometry term does the statement represent