Alexey is baking 2 batches of cookies. Since he tends to be quite forgetful, there’s a good chance he might burn the cookies, and then they won't come out tasty. Each batch is independent, and the probability of his first batch being tasty is 50%, percent, and the probability of his second batch being tasty is 70% percent. If XXX is a random variable that represents the number of tasty batches of cookies Alexey makes, drag the bars to graph the probability distribution for all possible values of XXX

4. find the geometric mean of 4 and 12. 24 8

Which of these sequences is a geometric sequence a 1,2,4, 7, 11, 16, 22. b. 2.4.8.14.22.38 c.3.6.9. 15.18,21 d. 3,9,27,81,243,729,

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.