The elevation e, in meters, above sea level at which the boiling point of a certain liquid is t degrees celsius is given by the function shown below. what elevation is the boiling point 79.5 degrees? 80 degrees?

e(t)=1100(80-t)+500(80-t) ^2

at what elevation is the boiling 79.5?

Given function is 



At t= 79.5 degree.

So we can place t= 79.5 in given equation


                    = 
                     = 
                    = 

So elevation equal to 625 meter at t = 79.5 degree.

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