5+2x2x2÷4-2
= 5+[(2x2x2)÷4]-2
= 5 + [8 ÷4 ] -2
= 5 + 2 - 2
= 5
This equation models exponential decay.
We know this because the exponent in the equation is negative, showing us that the growth is “negative”, meaning it represents decay.
Hope this helps!
