Let f(x)=8xf(x)=8x . what function represents a transformation of f(x)f(x) by a vertical stretch with factor 2?

a. g(x)=812xg(x)=812x

b. g(x)=12⋅8xg(x)=12·8x

c. g(x)=2⋅8xg(x)=2·8x

d. g(x)=82x

An account with a $250 balance accrues 2% annually. if no deposits or withdrawals are made, which graph can be used to determine approximately how many years will it take for the balance to be $282? it's e2020 ni️️as