Algebra 1 Rational number deduction

Question

Which number produces a rational number when multiplied by 0.5?

A.) 2.020020002...

B.) 2.22

C.)

D.) √7

Answer 1

With all due respect, I disagree with Mark, who is usually correct!

A> the product of (1/2) and the number in A is 1+(1/99), which is rational.

B> the product of (1/2) and the number in B is 1+11/100

C> Mark is certainly correct about C and D!!!!!