Final answer:
To find the number of miles the taxi traveled, subtract the flat fee from the total cost and then divide the result by the additional cost per mile. The taxi traveled 3 miles.
Step-by-step explanation:
To find the number of miles the taxi traveled, we need to subtract the flat fee from the total cost and then divide the result by the additional cost per mile. Let's assume the number of miles traveled is represented by the variable x:
$6.60 - $4.20 = $2.40
Now, we can set up an equation:
$2.40 = $0.80x
Divide both sides of the equation by $0.80 to solve for x:
x = $2.40 / $0.80 = 3 miles
Therefore, the taxi traveled 3 miles.