Question

Classify each number below as a rational number or irrational number

Answer 1

`- (19)/(10) \: » \: { \sf{rational}} \\ \\ 20\pi \: » \: { \sf{irrational}} \\ \\ { \sf{ - √(49) \:» \: rational }}`

because -√49 = -7

`85. { \bar {93}} \: » \: { \sf{rational}} \\ \\ 2 √(5) \: » \: { \sf{irrational}}`