Can you assist me with the following? I'm having a difficult time understanding the below. Thanks in advance for your help

Question 1

14) The temperature of a IES-degree Fahrenheit covered mug of hot coffee left in a room whose temperature is 65 degrees Fahrenheit can he modeled by the function C(t) = 65 + REEF\": where t is in hours and (It) is in degrees Fahrenheit. Find C TE} and include the units in your answer. For f(x) = 5x2 - 36x-2, find the slope of the secant line from x = -3 to x = -1