Find the values of x and y

Sunday: 1 1 2 monday: 1 tuesday: 2 1 2 wednesday: 1 3 4 thursday: 2 friday: 1 1 2 saturday: 2 jenna is a swimmer and trains every day. the schedule shown outlines the number of hours she trains each day. what is the total number of hours that jenna trains during the week?

A(t)=728(1+0.04)^t how much money did aditya originally invest

What is the y intercept of f(x)=(1/2)^x?