How do you write the number 5hundreds 6tens 12ones in standard form?

How much water should be added to 3 gallons of pure acid in order to obtain the 15 acid solution? How many miles in 18 quadrillion millimetres? To stay in place until someone comes? How do you round the 426.73 to the give place value tenths? What are two equivalent fractions to 212? What is the answer to 0.455 times 14 times6.4? How does the decimal move from mega meters to meter? What does 4350 million equal in billions? How long will it take at 30 miles per hour for 12 miles distance? How many degrees are in acute angles? What is the LCM of 2 7 and 10? How many combinations of three digits can be made from the numbers 998? If you have one side of quadrilateral can you get perimeter? How many parallel lines and angles does a pyramid have? How much is 8.6 meters? How many license plates can be made using 3 letters followed by 2 digits? Historical origin of digit 0-9? Which measurement is larger 2miles or 10000 feet? Which of the following correctly expresses 7000000000 in scientific notation? What is the AHEI score?