Answer:
4.5 hours does she exercise during the 6 days
Explanation:
Unit rate defined as the rates are expressed as a quantity as 1 such as 2 meter per second or 4 kilometer per hour.
As per the statement:
Brielle exercises for 3/4 hour each day
⇒

We have to find the how many hours does she exercise during the 6 days.

Substitute the given values we have;

Therefore, 4.5 hours does she exercise during the 6 days