The yearly cost of a life saving cancer treatment is growing exponentially if the current cot is $3500 per year which of the following funtions could represent the annual cost of this cancer treatment in x amount of years A x= 3,500^ 3/4 )^ x ( fraction as a exponent plus x the exponet )

B x= 3500x

C x= 3500 + 1000x

D 3500^ 5/2^x ( fraction as a exponent plus x the exponet )