Tom has a large photo he wants to shrink to wallet -sized. its width is 20 cm and its link is 30 cm. if he wants the width to be 5 cm what should he do?

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?