Problem 3: The equation e=-615m+32,000 describes the elevation (e) of a plane in feet, m minutes after it began to descend toward the runway. Which of the following best describes the meaning of the number -615 in the equation?

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