The temperature in a room is controlled by an electronic thermostat. The temperatures vary according to the sinusoidal function: y= 6 sin[90(x − 11)] + 19, where y is the temperature (°C) and x is the time in hours past midnight. A) what are the maximum and minimum temperatures in the room?

B) at what time does the temperature first hit 13 degrees Celsius

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step-by-step explanation:

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step-by-step explanation:

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is

correct answer is c. just did it

step-by-step explanation: