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VivaciousLyla
Hello!

Deanna starts running at 7:30, and runs for an hour and a half. Meaning, 1:30

To find out how long she ends up running, we must add the hour and a half to the time she started running:

7:30 + 1:30 = 9:00

Deanna ends up running until 9:00.
Deanna would be running up until 9:00 o'clock, this is because 7:30 plus I hr and a half equal to 8:60, and then that would turn into 9:00.