The quiz grades of a math class are given. 83, 76, 68, 97, 68, 80, 89, 74, 75, 81, 91, 90

The grades are normally distributed with a mean of 81 and a standard deviation of 9.3.

What is the z-score of the highest grade in the quiz?

Round the answer to the nearest hundredth.

−1.72
−1.08
1.08
1.72

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

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers

Jane’s favorite fruit punch consists of pear, pineapple, and plum juices in the ratio 5: 2: 3. how many cups of pear juice should she use to make 20 cups of punch?