Question 1195463
The measurement 75° 20' 48" represents 75 degrees, 20 minutes, and 48 seconds, or 75 + 20/60 + 48/3600 ≈ 75.347 degrees. Express each measurement in degrees, rounded to the nearest thousandth.
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75° 20' 48"  = 75° 20.8' = 75.347°
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Just arithmetic
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PS  My Casio fx-260 solar calculator can do this.
It costs $8 last time I looked.