What is the sum of the first eight terms of the geometric series? –4 + 20 - 100 + 500 +...

HELP PLSS​

11. a particular type of cell doubles in number every hour. which function can be used to find the number of cells present at the end of h hours if there are initially 4 of these cells? a. n = 4 ()" b. n = 4(2)" c. n = 4 + (2)" din = 4 +"

Laura read 1/8 of a comic book in 2 days. she reads the same number of pages every day. what part of the book does she read in a week

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a,b and c integers and a> 1