Ineed to find the missing length again

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

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)