Answer:
$8.75 left
Step-by-step explanation:
30 - 5^2 x
= 30 - 25 x
if x = 0.85 then
30 - 25 (0.85)
= 30 - 21.25
= 8.75
She has $8.75 left
Check the picture below tell me if you understand what I did.
A good equation would be: f(<em>x</em>)=<em>P</em>(<em>r</em>)^(15). The full equation would be f(<em>x</em>)=<em>P</em>(<em>r</em>/1)^(1(15)), but I just simplified it. <em>P</em> is the initial/principal population of the snails, and <em>r</em> is the yearly rate of growth.
The correct answer is the last choice
