Answer:
true
Step-by-step explanation:
Natural numbers are numbers naturally occurring in nature like 1, 2, 3, 4, 5, 6, 7, 8, 9 . . .
Whole numbers are numbers that are whole, like 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 . . . (the only difference is that there is a 0 included)
Integers include negative and positive numbers like -3, -2, -1, 0, 1, 2, 3, 4 . . .
Rational numbers are include all of the above AND anything that can be turned into a fraction, like fractions and decimals (that have an end) like 0.625, -0.5, 1, 4, 1/4, 6/15, 4.8, etc.
So in this case, yes, 0.5 is a rational number.
into a decimal then multiply it by 20 you get 15 and thats your answer.