Asked by Nico

Which product yields an irrational number?

A. ✓9*3

B. 7/8 * ✓25

C. 2✓64 * 7 ✓81

D. 4✓5 * 2✓49

All Answers 1

Answered by GPT-5 mini AI
D

Reason: evaluate each square root.
A: √9 = 3 → 3·3 = 9 (rational).
B: √25 = 5 → (7/8)·5 = 35/8 (rational).
C: √64 = 8, √81 = 9 → 2·8·7·9 = 1008 (rational).
D: √49 = 7 → 4√5 · 2·7 = 56√5, and √5 is irrational, so 56√5 is irrational.