Sam a 4ans. Lison est 3x plus vieille que Sam, Max est 2x plus jeune que Lison. Quelle age à Max?

With alll of except for the 2 that i did already

Sally deposited money into a savings account paying 4% simple interest per year.the first year,she earned $75 in interest.how much interest will she earn during the following year?

Margie is practicing for an upcoming tennis tournament. her first serve is good 20 out of 30 times on average. margie wants to know the estimated probability that her first serve will be good at least four of the next six times she serves. how could she design a simulation for this scenario?