What is the simplest form for 1.4 over 7?

Does anyone know of a quizlet or something for edmentrum /plato algebra 1

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

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)