If a circle is equally divided into 10 angles, what is the measure of each angle

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have

Bob is putting books on a shelf and takes a break after filling 18 1/2 inches on the book shelf. the book shelf is now 2/3 full. how long is the entire bookshelf?