THIS IS NOT THE EXACT ANSWER BUT IT MIGHT HELP
The cover slips serves two purposes: (1) it protects the microscope's objective lens from contacting the specimen, and (2) it creates an even thickness (in wet mounts) for viewing.
To Make I the subject you need to get it by itself. To do this divide both sides by V and t:
I = E/Vt
Dark matter may explain <span>unexpected orbital velocities of stars in galaxies.</span>
