Answer:
14776336
Step-by-step explanation:
Suppose that your PIN has 4 slots. Now there are 26 (upper-cased letters) + 26 (lower-cased letters) + 10 (digits) = 62 options for the 1st slots, 62 options for the 2nd slots, and so on. Therefore the total number of possible combination of PIN for all 4 slots are
It is given in the question , that Simon has 160 meters of fencing to build a rectangular garden. the garden's area (in square meters) as a function of the garden's width w (in meters) is modeled by
Which represents parabola and the parabola is maximum at its vertex, that is
Therefore the width is 40 meters and the area is