Respuesta :
On 102.89[tex]102.89^{th}[/tex] day from the hottest day of the year, the daily high will be 20 degrees Celsius.
What is a Function?
A function is a law that relates the dependent and the independent variable.
The function that models the temperature is given
T(t)=7.5cos(2π/365t)+21.5
here t is in radian
The temperature will be 20 degree Celsius at
20 = 7.5 cos (2π/365t) +21.5
-1.5 /7.5 = cos (2π/365t)
cos⁻¹ ( -0.2) = 2π/365)t
1.772 *365 /(2*π) = t
t = 102.89 day from the hottest day.
Therefore, on 102.89[tex]102.89^{th}[/tex] day from the hottest day of the year, the daily high will be 20 degrees Celsius.
To know more about Function
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