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:

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step-by-step explanation:

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed