Question

which function models exponential decay $y = 5 \times {3} ^x$$y = 3 \times {05}^x$$y = 05 \times {5}^x$$y = 0.05 \times {3}^x$$y = 05 \times {3}^x$

Answer 1

We have the following:

When a number that is a decimal below is raised, it has a tendency to be a smaller number

for example

$0.4^3$

Therefore, the function that models exponential decay is

$y=3\cdot0.5^x$