Hola, me dejaron unos ejercicios de matemáticas y no se cómo se realizan , solo son los del punto 12

What is the area of a pizza with a radius of 40 cm leave the answer in terms of π to find your exact answer 40π cm² 1600π cm² 800π cm² 80π cm² π=pi

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?