Identify the missing side length using a scale factor of 1.5

Of four points are collinear, they are also coplanar

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

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