Answer:
3.5 * 10^2
Explanation:
So you start with 350.
What you do is take the decimal from the beginning of 350 and move it to the left.
350.0 -> 35.0-> 3.5
And you move the decimal until you get only one number in front of the decimal.
Then you take the number of times you moved the decimal and put it with ten so in this case it would be. 10^2.
Making the final answer: 3.5 * 10^2