math
posted by
Fani on
.
ms.Sue,
where did you get 2:20?

math 
Ms. Sue,
12:00 (midnight) = 11:60
11:60  9:40 = 2:20
She slept 2 hours, 20 minutes between 9:40 and midnight.

math 
Fani,
Oh. Thank you very much!:);)

math 
Ms. Sue,
You're very welcome.