The following choices describe exponential growth:
1) The number of butterflies in an area increases by 10% per year.
3) Kristy bought a collector's coin for $2.15 and its value increases at a rate of 3% per year.
Pretty sure its 2cm i worked it out
Sq. root of 405= approximately positive or negative 20.124611797498107267682563018581
Its irrational. This is as far as the calculator goes.
It sounds like you want to vertically compress an exponential growth function. If so, then the answer is (1/3)(3)^x, which is choice A.
This is because anything with (1/3)^x represents a decay function, allowing us to rule out C and D.
Choice B is a growth function, but comparing y = (3)^x to y = 3(3)^x, and we see there is a vertical stretch as opposed to a vertical compression going on. So we can rule out choice B as well. The only thing left is choice A.
