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 
The multiples of 44 are 44, 88, 132, 176, 220, and so on. Each number that comes after increases by 44.
Pretty sure it is nine. I hope I helped
B. 15:12, 15 to 12, 15/12