How many steps are required for Dr. Johnson to break an m × n sized bar of chocolate into 1 × 1 pieces?
See the answer
Answer: mn-1.
To break an m × n sized bar of chocolate into 1 × 1 pieces Dr. Johnson needs either ( m-1) +(n-1) x m steps or (n-1) + (m-1) x n steps.
( m-1) +(n-1) x m= m – 1 + nm – m = nm – 1
(n-1) + (m-1) x n = n – 1 + mn –n = mn – 1
A hallmark of advancing Parkinson’s disease is a distinctive shuffling walk. Dual-task training is an effective but costly physical therapy that helps people with...