Answer:
1.79 × 10^1
Explanation:
The goal of writing a number in scientific notation is to have a decimal number, with one digit to the left of the decimal point, followed by a × 10 to some power.
To format your number in this way, we'll divide the 17.9 by 10, 1 time(s), making it a 1.79.
We do this, because each division by 10 moves the decimal point to the left one digit.
But in order to keep our number the same number, we must have a × 10^1 next to the 1.79.