Answer:
Answer: A. 90√3
Step-by-step explanation:
[tex]5 \sqrt{2} \: . \: 9 \sqrt{6} \\ = (5 \sqrt{2} )(9 \sqrt{3} \times \sqrt{2} ) \\ = 5 \sqrt{4} \times 9 \sqrt{3} \\ = (5 \times 2) \times 9 \sqrt{3} \\ = 10 \times 9 \sqrt{3} \\ = 90 \sqrt{3} [/tex]
