The table shows the largest known islands on Earth. What is the difference in the areas of Australia and Greenland? A. 2,442,330 sq. km B. 3,442,330 sq. km C. 3,442,330 sq. km D. 5,442,330 sq. km

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[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?

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