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Water leaks from a tank at a rate R( t ) where R( t ) = 3.6 + 0.438 t gallons per hour where t is the number of hours since 7 AM
Interpret 27(3.6+0.438t)ds\displaystyle {\int_{{2}}^{{7}}}{\left({3.6}+{0.438}{t}\right)}{d}{s} = 27.86.