Question

write an exponential function to model the situation. a population of 350 animals decreases at an annual rate of 21%

Answer 1

you can use the exponential model
y = A ( 1 - r )^t , this is for decreasing growth (otherwise known as decay)

Answer 2

assuming r is a decimal
If r is a percentage, first divide r by 100

Answer 3

\[100\%-21\%=79\%=.79\]

Answer 4

\[P=350\times (.79)^t\]