If each of the following is a part of a geometric sequence, find the missing terms. assume the ratio is positive in each case.
a. 7,_,_,21
b. 10, _,_,_1,
c. _, 7, _, 3
d. _, -3, _ -7

Given the following statements, which is the best

Select the correct answer. joshua likes to read. he read 6 books when he was 6 years old. every year he doubled the number of books he read the previous year. how many total books did he read between the ages of 6 and 10? a. 60 b. 90 c.186 d.187

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.