How do I find the sum of this?

What is the equation of the graph that represents f(x)=x^4 stretched vertically by 2 and shifted up 3 spaces

This is the number of parts out of 100, the numerator of a fraction where the denominator is 100. submit

James is playing his favorite game at the arcade. after playing the game 3 times, he has 8 tokens remaining. he initially had 20 tokens, and the game costs the same number of tokens each time. the number tt of tokens james has is a function of gg, the number of games he plays