Convert 28.7251° to degrees, minutes, and seconds. round to the nearest second.

28.7251 =

 28 degrees

 then take the decimal and multiply by 60 to get the minutes

 so 0.7251 *60 = 43.506, use the whole number (43)

 so now you have 28 degrees, 43 minutes

 now take the remaining decimal ( 0.506) and multiply by 60

0.506*60= 30.36

 when you have a decimal left over for the seconds, keep that as is.

 so you now have 28 degrees, 43 minutes and 30.36 seconds

 use ' for minutes and " for seconds

28 degrees 43' 30.36"

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

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i believe that the answer is

b. y-1=-2(x-4)

hope this !