Alright, lets get started.
Jen picked three fourth in half an hour.
Half an hour means 30 minutes.
At the same rate, how many she can pick in 2 hours.
2 hours means
minutes
Now,
In 30minutes, Jen can pick =
![(3)/(4)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/eulje16nvg9cdod3mppp9iwzntxa82tvs3.png)
In 1 minute, Jen can pick =
![(3)/(4) *(1)/(30)](https://img.qammunity.org/2019/formulas/mathematics/high-school/6rsasrfl4lofdsuey1lbf9oa4vmuomy977.png)
In 120 minutes, Jen can pick =
![(3)/(4) *(1)/(30) * 120 = 3](https://img.qammunity.org/2019/formulas/mathematics/high-school/7ecjdoq8sbi7n3s9dhtpstyussd3x4umvw.png)
Hence Jen can pick complete 3 in 2 hours of time.
So the answer is 3 : Answer
Hope it will help :)