round 81*2^x=99 to the nearest hunderedth

Answer: 0.29
Step-by-step explanation:
If you calculate it's:
0.28950661
You round to the nearest hundred bc it's too long.
Find the number in the hundredth place 8 and look one place to the right for the rounding digit 9. Round up if this number is greater than or equal to 5 and round down if it is less than 5.