Question

A manatee population decreases by 15 manatees each year for 3 years. Find the total change in the manatee population.

Answer 1

$total\ change=3\ years\ * 15\ manatee\\\\ total\ change=45\\\\ In \ 3\ years\ time\ manatee\ population\ decreased\ by\ 45 manatees$

Answer 2

so 15 per year for 3 years or 3 times 15 or 45 total loss so the change is 45 difference or -45 in 3 years