the atoms of a radioactive element are randomly disintegrating. if every jam of this element on average emits 3.9 alpha particle per second, what is the probability that during the next second the number of alpha particles from 1 gram is at most 6, at least 2, at least 3 and at most 6

If you answer right ill give brainliest, : )

Raj encoded a secret phrase using matrix multiplication. using a = 1, b = 2, c = 3, and so on, he multiplied the clear text code for each letter by the matrix to get a matrix that represents the encoded text. the matrix representing the encoded text is . what is the secret phrase? determine the location of spaces after you decode the text. yummy is the corn the tomato is red the corn is yummy red is the tomato

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?