Please help! Looking for experts! interpret each plotted point in the graph of the proportional relationship

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0