Someone help me with this pls

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

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.