31. Which of the following sequences are geometric? a. 8, -2, -12, -22, ...
b. 0, 3, 8, 15, ...
c. 100, 20, 4, ...
d. -11, -9,-7, ...
e. 5, 20, 80, ...

For the equations below which statement is true ?

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?