Posted by **HApida** on Friday, May 7, 2010 at 3:07pm.

The temperature in degree celcius in a factory during the course of a working day from 6am to 10pm can be modelled by the function

H(t)=18+6sin(pit/8-5pi/4)for 6<t <22

_ _

where t is the time in hours in 24Hr clock.

what are the highest and lowest temperatures during the working day.

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