How much did each ruler cost?

Is 900 cm equal to 9000mm? Can 0 take away 0? Which one of the following concepts of distance is illustrated by the fact that as cost increases with distanceinteractions between people decrease A erosion B flexibility C friction D relativit? Which is not a prime number 37475161? How many syllables are in the word Zeus? What four states form the four corner area of the US? 40 oz in simplest form and in mixed number? What is the equivalent to stabutherm GH 461? How many centimetres is six foot one and a half? What is the The quotient of a number and 5 less 10 is 3? Is five or seven a composite number? What are the prime numbers from 23 to 49? How many parallel tangents can a circle have? How do write 1000000 in expanded form? When is the difference of two decimals an integer explain? What are the rules concening hachured lines? How do you write 1.31 as a percent? What is the sum of the multiples of 2 from 2 to 10 . everyone knows the simple answer but What is the formula to calculate this? What is a quadrilateral with two paralell side? How many cm in 4.3 m?