The half-life of a radioactive kind of cesium is 3 hours. How much will be left after 6 hours, if you start with 600 grams of it? Grams

Find the power series expantion of f(z)=log(4=3z) at the point z=-1

Anyone know? will mark brainliest if correct!

Arestaurant gives out a scratch-off card to every customer. the probability that a customer will win a prize from a scratch-off card is 25%. design and conduct a simulation using random numbers to find the experimental probability that a customer will need more than 3 cards in order to win a prize. justify the model for your simulation, and conduct at least 10 trials.