Answer: 4.2786950x10^7 or 4.2x10^7
Explanation:
To convert a number to scientific notation, move the decimal.
42,786,950
At the and of this number, there is an understood decimal. To find the scientific notation version of it, move the decimal over to the left until you have only one digit to the left of the decimal, as such...
4.2786950
To then find what the exponent you're multiplying by, you count how many places you moved the decimal.
So in the end, you get 4.2786950x10^7