Answer:
Tiva would earn $68 for 8.5 hours.
Explanation:
The given rate is

In words, Tiva earns $8 per hour.
So, to complete the sentence, we could use the rule of three. If she earns $8 per hour, how much money would earn for 8.5 hours:

Therefore, Tiva would earn $68 for 8.5 hours.