You could use a simple calculator it's only 10.
The hundred thousand place is the number that is 6 times to the right of the decimal:
In this case that number is 2
140 1/8 can not be expressed in radical form because it neither has an exponent or a square root. Unless if 140 is raised to the power of 1/8, then that can be.
The answer would be C because b=+16 which means that it intercepts line y at 16, which is shown in the graph.