Answer:
<em>Mark used 6.43 megabytes of data.</em>
Step-by-step explanation:
The given equation is:
, where
is amount of data used in megabyte.
For finding the amount of data Mark used, <u>we need to solve the above equation for
</u>.
First subtracting 5.25 from both sides, we will get.....
Now, dividing both sides by 0.3 ...........

<em>(Rounded to the nearest hundredth)</em>
Thus, Mark used 6.43 megabytes of data.