Help ME pleasee

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

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5