A bookshop had the same number of erasers, rulers and pencils at first. After 38 pencils, some erasers and rulers were sold, there were 90 items left. There were twice as many erasers as rulers left. the number of pencils left was 15 fewer than the number of erasers left. How many rulers were sold? Post this on jiskha. Then type done (plz do)

The volume of the sun is approximately 1 × 10^18 cu km, while the volume of jupiter is approximately 1 × 10^15 cu km. which of the following is true? a. the volume of jupiter is approximately one thousand times the volume of the sun. b. the volume of jupiter is approximately one hundred times the volume of the sun. c. the volume of the sun is approximately one thousand times the volume of jupiter. d. the volume of the sun is approximately one hundred times the volume of jupiter.

Car a and car b were in a race .the driver of car b claimed that his car was twice as fast as car a

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose