Find a value before a percentage change. Could you please explain to me how you’ve got the answer too, so I can do the rest.

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

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor

What is the equation of a line passing through (-6,5) and having a slope of 1/3