\(\delimitershortfall-1sp\newcommand\abs[1]{\left|#1\right|}\newcommand{\lt}{<}\)
  1. If it represents a decrease of %.
  2. An annual decrease of 15% corresponds to a decay factor of .
  3. Which function decreases more rapidly: with a decay factor of 0.15, or with a decay factor of 0.05?

  4. An exponential function is decreasing if .