How do you write 390 in scientific notation?

Answer 1

To write in scientific notation, you first need to divide the number by a multiple of 10 such that the answer is between 0 and 10. In this case, we get 3.9 by dividing by 100. Then you need to find what multiple of 10 your divisor is. 100 is 102.

You then put these two values (3.9 and 102) together as a multiplication, and that's how you write the initial number in scientific notation:

3.9x102