A day is divided into two halves when time is recorded on a twelve hour clock. Since there is a 3:25 in the middle of the afternoon as well as a 3:25 in the middle of the night, it is necessary to indicate which 3:25 is the one being referred to. Therefore, when referring to the period of time after midnight and before noon it is common to add the term "a.m." Likewise, when referring to the period of time after noon and before midnight it is common to add the term "p.m." The letter "m" in each term is an abbrevation of the word "meridian" (which means "noon"). The letter "a" is an abbreviation of the word "ante" (which means before); the letter "p" is an abbreviation of the word "post" (which means "after"). Although 12:00 a.m. is generally considered to be the one at night and 12:00 p.m. the one during the daytime, it is best to clarify 12:00 with the words "noon" or "midnight" in order to avoid the possibility of confusion. Such terms are used only when referring to time measured on a twelve hour clock. When time is measured using a twenty-four hour clock, clarfying time as "a.m." or "p.m." is superfluous.
It is (4+24k) hours and 49 minutes, where k is any integer.
3 hours and 30 minutes.
That depends upon which 11:10 and which 7:00 you mean: 11:10 am to 7:00 pm is 7 hours 50 minutes 11:10 am to 7:00 am (the next day) is 19 hours 50 minutes 11:10 pm to 7:00 am (the next day) is 7 hours 50 minutes 11:00 pm to 7:00 pm (the next day) is 19 hours 50 minutes. (Using 24 hour notation or including am/pm removes this ambiguity.)
4 hours 48 minutes
-506
23 hours and 38 minutes.
7 hours and 30 minutes
It is (4+24k) hours and 49 minutes, where k is any integer.
You can subtract the hours and the minutes separately.
3 hours and 12 minutes.
8 hours and 30 minutes.
4 hours and 20 minutes.
5 hours and 30 minutes.
3 hours and 30 minutes.
5 hours and 15 minutes
6 hours and 30 minutes
4 hours and 15 minutes.