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Initial temperature = 20° C

Temperature after 18 minutes = 4° C

Step-by-step explanation:

Function representing the relation in the temperature of the soda and time has been given as,

T(x) =

Here x = number of minutes since the can was placed in the cooler

For initial temperature of the soda,

x = 0,

T(0) =

      = -8 + 28(1)

      = 20° C

For the temperature after 18 minutes,

x = 18,

T(18) =

       =

       =

       = 4.456 C

       ≈ 4° C

step-by-step explanation:

you divide the denominator by the numerator on both sides and if the quotients are equal then the fractions are equivalent