How many hours is 8am to 430pm with 1 hour lunch?

Who created a system of mathematics in which a circle represented 1 and a bar represented 5? What IQ score would indicate an eight year old boy is gifted? Where do variables come in? What is the original sequence for 15 25 10? What is 3 1 4 as an improper fraction? What is a polygon with four equal sides and no right angles called? How exactly does Envirofone work? What is the IBO speed of a 2009 Parker Trailblazer XP 60 lb? How do you get the answer 225 from the questen what is the area of a square with the side length of 15? How do you find the area of somthing? What is the spin notation for silver? What is the answer for x(-3y - 5z) if x 14 y 5 and z 6? How did Albert Einstein contribute to math? How many yards is 36 feet? What is the fractional notation for 5.9? What quarter is worth more than 25 cents? If mags (m) is 34 years oldhow old is vector (v)? How many solutions will the equation 25 equals 2x squared-6x have? How much water will a 6 inch pipe? What plus what equals seven tenths in fraction?