Alec is building towers with blocks. His blue tower is 6.487 inches tall and his orange tower is 11.53 inches tall. How much taller is the orange tower?

Which number produces a rationale number when multiplied by 1/5

Pls brainliest will be awarded if answer is correct

20.ju inces. which ordered pair is a viable solution if x represents the number of books he orders and y represents the total weight of the books, in ounces? (-3,-18) (-0.5, -3) (0,0) (0.5, 3)