Tell whether the set of whole numbers is closed under each operation. Write yes or no. If your answer is no, give an example.
13. multiplication: a b
14. division: a = b
15. exponentation: ab
16. squaring the sum: (a + b)2

A80-foot piece of siding is cut into three pieces so that the second piece is four times four times as long as the first piece and the third piece is five times as long as the first piece. if x represents the length of the first piece, find the lengths of all three pieces.

Find the value. a. 0.003 b. 0.03 c. 0.3 d. 3

Tyler enjoys the fish so much that after his birthday his family decides to take him to a famous aquarium a tank at the aquarium is similar to his tank with the scale factor of 8 how many times greater is the volume of the tank at the aquarium than the volume of tyler tank