3 (1.4*10^6)

multiply or divide. write tje answer in scientific notation

4.2 * 10^6

Step-by-step explanation:

Hard way: 10 to the power of 6 is 1,000,000. That times 1.4 is 1,400,000. That product times 3 is 4,200,000. 4.2 times 10 to the power of 6 will be the answer written in scientific notation.

Easy way: 3 times 1.4 is 4.2. 4.2 times 10 to the power of 6 is the answer.