Which of the following is a geometric sequence? A) 3,-9,27, -81,...
B)19, 15, 21, 27,...
C)4, 9, 16, 25,...
D)30,15, 0, -15,...
Please help
ILL GIVE BRAINLEST TO WHOEVER IS RIGHT

The following frequency table relates the weekly sales of bicycles at a given store over a 42-week period.value01234567frequency367108521(a) in how many weeks were at least 2 bikes sold? (b) in how many weeks were at least 5 bikes sold? (c) in how many weeks were an even number of bikes sold?

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25