The diameter of the sun is 1,390,000 km. In scientific notation this is ________

Question

Quizplus · Accepted Answer

To convert the diameter of the sun to scientific notation, we move the decimal point to the left until there is one digit to the left of the decimal. This means we need to move it 6 places to get 1.39. We then count the number of places we moved the decimal point and use that as the exponent of 10. In this case, we moved it 6 places so the exponent is 6. Therefore, the answer is 1.39 x 10^6 km, which when written in scientific notation, is 1.39 11e6 km. The only answer choice that matches this is C.

The Diameter of the Sun Is 1,390,000 Km