Jimmy spends ¾ of an hour getting ready for school. It takes 30 minutes to travel to school. If he needs to be at school at 9:00 am, what time should he get up?
45 min + 30 min = 75 min
= 1 hour and 15 min = 1.25 hr
9 - 1.25 = 7.75 which is 7:45 am
To determine what time Jimmy should get up, we need to calculate the total time needed for him to get ready and travel to school.
First, we need to convert the time Jimmy spends on getting ready for school from fractions to minutes. As there are 60 minutes in an hour, ¾ of an hour is equal to (¾) x 60 = 45 minutes.
Next, we add the time it takes to travel to school, which is 30 minutes.
So, the total time Jimmy needs is 45 minutes (getting ready) + 30 minutes (traveling) = 75 minutes.
Now, we need to subtract this total time from the time he needs to be at school, which is 9:00 am. Remember that we need to convert 9:00 am into minutes as well.
9:00 am is equivalent to 9 hours x 60 minutes/hour = 540 minutes.
Finally, we subtract the total time needed (75 minutes) from the time he needs to be at school (540 minutes):
540 minutes - 75 minutes = 465 minutes.
Now, we need to convert the result back into hours and minutes. Since there are 60 minutes in an hour, we have:
465 minutes ÷ 60 minutes/hour = 7 hours remainder 45 minutes.
Thus, Jimmy should get up 7 hours and 45 minutes before 9:00 am.
To find the exact time, subtract 7 hours and 45 minutes from 9:00 am:
9:00 am - 7 hours = 2:00 am.
2:00 am - 45 minutes = 1:15 am.
Therefore, Jimmy should get up at 1:15 am to be able to get ready and reach school on time.