Answer:

Step-by-step explanation:
Given the expression
, to express the the fraction in scientific notation, we will apply the law of indices below;
According to one of the laws of indices, 
Applying this to the fraction;

The best estimate for the fraction in scientific notation will be 
Easy, it is 1. I hope that helps =D
Answer:
53.44 cubic meters
Step-by-step explanation:
A cylindrical oil drum is 2.1 meters high and has a radius of 0.9 meters. How many cubic meters of oil can the drum hold? (volume)
Volume of a cylinder = π × r² × h
r = 0.9 meters
h = 2.1 meters
= π × (0.9m)² × 2.1m
= 53.44 cubic meters
Therefore, the volume of the cylindrical oil drum = 53.44 cubic meters
I think its B, but im not entirely sure.
We can do this from finding 2/3, and that equals 0.66_7 and 7/12 is 0.5833_ and we divide the whole thing. 41.66 and 4.5833 and we get 11