Remember that ¤ is the universal, generic currency symbol.
 To calculate the distance to the horizon in miles, multiply the square root of the height of your eyes by 1.35.
 This definition will suffice for now. The next chapter will introduce the idea of estimating in ideal time as an alternative to story points. A team that estimates in ideal time will calculate velocity as the sum of the ideal time estimates of the stories completed.
 A number in the Fibonacci sequence is generated by taking the sum of the previous two numbers.
 Technically, I should divide it by 0.60 and 1.6. However, because 0.60 and 1.60 are meant to be reciprocals (0.6 × 1.6 = 0.96 ≅ 1), you get approximately the same values by multiplying.
 Sizing a buffer in this way has been previously suggested by Reinertsen (1997), Newbold (1998), and Leach (2000).
 This is why this buffer-sizing technique is commonly called the “Square Root of the Sum of the Squares” approach.