Question

How high would a stack of 1 million quarters be? (Assume a quarter is 1.75 mm thick.)

Answer 1

1,750,000 mm high i would say

Answer 2

1.75 mm  =  1.75 x 10⁻³ meter

1 million  =  1 x 10⁶

             (1 x 10⁶) x (1.75 x 10⁻³ m)  =  1.75 x 10³ m  =  1,750 meters