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To convert hours to minutes, you multiply by 60 because there are 60 minutes in an hour. Therefore, 90 hours is equal to 90 x 60 = 5,400 minutes.
To convert minutes to hours, you divide the number of minutes by 60. Therefore, 5400 minutes divided by 60 equals 90 hours. So, 5400 minutes is equivalent to 90 hours.
You subtract 90 degrees minus 80 degrees 25'. Note: You should convert the 90 degrees to 89 degrees and 60 minutes first, that way you can easily subtract degrees and minutes.
To find the ratio of 90 seconds to 7 minutes, we first need to convert both time periods to the same units. Since there are 60 seconds in a minute, 90 seconds is equal to 1.5 minutes. Therefore, the ratio of 90 seconds to 7 minutes is 1.5:7 or simplified to 3:14.
The idea is to divide the distance by the time. Since presumably you want the answer in miles/hour, you should first convert the minutes to hours.