Omg i need help ugh jjndjf

You got a job selling magazines door-to-door. you are paid $100 per day plus $1.50 for each magazine you sell. which recursive formula models this situation?

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

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