What is 0.15x10^-2 written in scientific notation?​

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?

Write the percent as a fraction or mixed number in simplest form. 0.8%