1. according to the motley fool, in 2014 there were 148.6 million personal federal tax return filed, and average amount of tax paid per filed was $9,118. write each of these numbers in scientific notation.

Step-by-step explanation:

By definition, the form of Scientific notation is:

Where the base is 10, "a" is any number from 1 to 10 but not including 10,  and "n" is an integer.

Therefore to write a number in Scientific notation, the decimal point must be after the first digit and the power "n" must indicate how many places the decimal point is moved.

We know that:

Then, we need to move the decimal point 8 places to the left:

To write $9,118 in scientific notation, we need to move the decimal point 3 places to the left:

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.