A student has scores of 79, 78, and 82.75 on his first three tests. He needs an average of at least 80 to earn a grade of B. What is the minimum score that the student needs on the fourth test to ensure a B?

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

Which spreadsheet would be used to compute the first nine terms of the geometric sequence a^n=32•(1/2)n-1

1. if events a and b are non-overlapping events, how do you find the probability that one or the other occurs? 2. what does it mean if p(a or b) equals 1?