How many hours and days are in 78 hours?

What is the exact value for the expression the square root of 189 minus the square root of 21 plus the square root of 84 Simplify if possible.? How many side in ectagon? Word form for 0.59861? What has more thermal energy 90 degree cup of water or a 90 degree bathtub? What was the name of the first Inca number system? How do you round 244 to the nearest hundredths? What do expressions and equations have in common? How many months are 75 years? Does the term mean refer to average? What word is written wrong sonic recapsure or percent? Why would you want to simplify an algebraic expression? How is it possible to find a fraction smaller than another fraction? Prove that secB - cosB equals tanBsinB? What divided by 7 is 4? What term means to break apart? What is an antonym for strange? How many m are in 13 kilometers? What does an exterior angle and an interior angle add up to? What is the answer for x plus 2 x plus 2 equals 25? What is the acceleration of a car that maintains a constant velocity of 100 kmh for 10 s?