A cell phone company charges a flat rate of $3.99 per month with an additional charge of five cents per minute how many minutes did Casey talk on her cell phone if her monthly bill is $38.44
Let's first find out the total amount Casey spent on her cell phone bill excluding the flat rate charge.
Total bill - flat rate charge = additional charge
$38.44 - $3.99 = $34.45
Now, we can calculate how many minutes Casey talked on her cell phone.
Additional charge / Rate per minute = Total minutes
$34.45 / $0.05 = 689 minutes
Therefore, Casey talked for 689 minutes on her cell phone.