⟩ In madras,temperature at noon varies according to -t^2/2 + 8t+3, where t is elapsed time.Find how much temperature more or less in 4pm to 9pm?
here temp is direstly proportional to -t^2/2+8t+3
so at 4pm -4^2/2+4*8+3 is 27
at 9 pm -9^2/2+9*8+3 is 70.5
so diff is 34.5