Find the number of pairs of integers, (x, y), satisfying the inequality, 9 < x^2+y^2 < 49.

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

What is the value of f(x) = 2.2 for f(-2)?

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236