15) it is irrational, because if you do a rational times a irrational you must get something with decimals 16)No, because /100 -64 is /36 and is 6 and /100 - /64 is 10 - 8 is 2
11). A perfect square does not always have to be even. A perfect square is when a number divides into a number that can be multiplied by itself to get the bigger "perfect square" number.
15) Irrational. The product "Answer" would just be adding onto the rational number. Like 5 x √3 would just be 5√3.
16) No they dont. √100-64 would be the value of √36 (6). √100 (10) - √64 (8) = 2
