Answer
$78,000 = 7.8 \times 10^4$
Work Step by Step
$78,000$
Step 1: Move the decimal point until the number is between 1 and 10.
Step 2: The decimal point is moved 4 places and the original number is 10 or greater, so the count is positive 4.
Step 3:
The scientific notation is:
$78,000 = 7.8 \times 10^4$