The surface of Grand Lake is at an elevation of 648 ft. During the current drought, the water level is dropping at a rate of 3 inches per day. If this trend continues write an equation that gives the elevation in feet of the surface of Grand Lake after x days.

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Given situation: => A grand lake surface is equals to 648 feet => Every day the water drops 3 inches Now, we need ti create an equation that shows the process of given situation in how many days. => Since we have 2 different unit of measure, we need to convert feet to inches => 1 foot is equals to 12 inches => 648 feet x 12 inches = 7776 inches Now, we have the same unit of measure Let’s start the equation: => 7776 inches – 3inches(x) where x is the number of days.

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