The surface area of an African elephant can be estimated in terms of the length of...

 

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The surface area of an African elephant can be estimated in terms of the length of its trunk, S=53x0.7, with x being the length of the trunk in feet and S being the surface area in square feet. If at some point in an elephant's life its trunk is changing at a rate of .01 feet per day, at which time its trunk length is 3 feet, what is the rate of change of its surface area at that time in ft2/day to two decimal places? The surface area of an African elephant can be estimated in terms of the length of its trunk, S=53x0.7, with x being the length of the trunk in feet and S being the surface area in square feet. If at some point in an elephant's life its trunk is changing at a rate of .01 feet per day, at which time its trunk length is 3 feet, what is the rate of change of its surface area at that time in ft2/day to two decimal places?

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