Step-by-step explanation: 1. Distibute the + (if there is no number after it, it means 1), so -17+43-5. 2. Then you just solve from left to right
If the exact length is s, you have
.. s = r*θ . . . . θ = π/2
.. r = s/θ
.. r = 2s/π
Fill in the exact length for "s" in the formula and compute to find the radius.
1st letter can be any of 5 letters
2nd letter can be 5-1 any of 4 letters
5*4 = 20
there are 20 possible passwords
