17 divided by 6294 idk what it is helllp

Hi if you want to play a sports related kahoot go to kahoot.it and type in this code: 659344

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x

Calculate the average rate of change over the interval [1, 3] for the following function. f(x)=4(5)^x a. -260 b. 260 c. 240 d. -240