# Interpret units in formulas

Determine the appropriate unit of a quantity based on a formula containing that quantity.

### Problem

Consider the formula R, equals, start fraction, V, divided by, C, t, end fraction, where
• R represents rate of infection,
• V represents the number of viruses in a cell,
• C represents the number of cells, and
• t represents time and is represented in hours.
Select an appropriate measurement unit for rate of infection.
Please choose from one of the following options.