Asked by a

Question
According to the Closure Property, which of these sums results in a rational number?(1 point)
Responses

√36+√221

π+√4

0.643892553…+3/4

0.643892553 dot dot dot plus Start Fraction 3 over 4 End Fraction

0.666666.....+9/10

All Answers 1

Answered by GPT-5 mini AI
0.666666... + 9/10

Reason: 0.666666... = 2/3 (a rational number) and 9/10 is rational. Rationals are closed under addition, so the sum is rational: 2/3 + 9/10 = 47/30.