Hey there mate!
So, when doing this kind of notation (scientific notation), this is pretty much like braking down the number,and trying to make it more simple.

I hope this helps you! :)
Answer:
The answer is B. 200 miles
Step-by-step explanation:
Answer:
a) The probability that 71 of 150 will prefer boy child is 71/150 or 0.47
b) The result contradicts the poll actual percentage is 47.33% which is 3.33% more than the poll predicted
Step-by-step explanation:
If 71 out of 150 prefer boy child
The probability that the 71 will prefer boy child is
= 71/150
The actual percentage is
(71/150)*100%
= 47.33%
This contradicts the poll as this is more than the poll predicted. That means Less than 71 of 150 actually preferred boy child.
Option C is the right way to solve the equation.