At 12 noon the temperature in Harry's house is 22∘C22^{\circ}\text{C}22∘C At 6 pm the temperature in Harry's house is 25∘C25^{\circ}\text{C}25∘C
Harry models the temperature in his house, TTT, by the formula
T=A+Bsin(15h) T = A + B \sin(15h) T=A+Bsin(15h)where h h\,h is the number of hours after 12 noon.
State the value that Harry should use for AAA.
State the value that Harry should use for BBB.
Using this model, calculate the temperature in Harry's house at 9 pm.
Using the model find the number of hours in a day that the temperature will be above 23.5∘C23.5^{\circ}\text{C}23.5∘C
