Express 0.00720 in exponential notation.

Question

Quizplus · Accepted Answer

In exponential notation, the number is written as a coefficient multiplied by 10 to the power of an exponent. To determine the exponent, move the decimal point to the right until there is only one nonzero digit to the left of the decimal. The number of places the decimal point was moved gives the exponent. In this case, 0.00720 becomes 7.20 when the decimal point is moved three places to the right. Therefore, the exponent is -3. The coefficient is 7.20, so the number in exponential notation is 7.20 × 10^-3. Choice C is the only option that matches this answer.

Express 0.00720 in Exponential Notation