Write the interval (5,100] as an inequality and using set notation

The inequality notation with bracket 

[  ]  when we want to include the end value
(  ) when we don't want to include the end value

Interval (5, 100] means that 5 and 100 are the end values, we don't want to include the '5' but we want to include '100'

The inequality signs for not including end value is < and >
The inequality signs for including end value ≤ and ≥

(5, 100] = 5 < x ≤ 100

11 hours and 25 minutes

Step-by-step explanation:

Since she left at 7:10 am you can add 50 minutes and you will get 8, then all the way to 6 pm is 10 hours. Now you just have 50 and 35 minutes that you havent added to the total yet so when you add those two together you get 85. But there isnt 85 minutes in a hour so you would have yo break it down and you would get 1 hour and 25 minutes. Add 1 hour and 25 minutes to 10 hours and you get 11 hours and 25 minute. I hope that helps!

Sorry if you didnt under stand my explanation.