Answer: B 450
Step-by-step explanation:
Given product : [tex] 89.65\times 4.75[/tex]
After rounding off to the nearest tens, 89.65 is nearest to 90 .
After rounding off to the nearest ones, 4.75 is nearest to 5.
Now, the estimate product will become
[tex] 89.65\times 4.75\approx90\times5=450[/tex]
Hence, the estimated product of [tex] 89.65\times 4.75[/tex] is 450.