Question

The Johnson family income is

estimated to be $125,000 per year. Mary wanted to write this number
in scientific notation. If she wrote
1.25 x 10" , what value of n should
she use?

Answer 1

The value of n would be 5

Explanation:

This is understanding how to take numbers and writing them in scientific notation.

125,000 = 1.25 x 10⁵

First of all.

125,000 = 125,000.0 (See that decimal point?)

We want that decimal point behind the number 1 as seen in the scientific notation. All you have to do is move that decimal point to the left until you reach the ones place.

125000. → 1.25

(You're not finished yet)

Since we moved the decimal five times, then we must put an exponential value of 5 above the 10

In conclusion:

125,000 = 1.25 x 10⁵