kaylailkanic1487
26.07.2019 •
Mathematics
After being poured into a cup coffee cools so that its temperature t(t) is represented by the function t(t)=70+110 e^(-t/2) where t is measured in minutes and t(t) is measured in degrees fahrenheit. what is the average temperature of the coffee during the first four minutes after being poured
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Ответ:
After 4 minutes, t= 4
Substituting in the temperature equation,
T(4 minutes) = 70+110e^(-4/2)=70+110e^(-2) = 84.89 oF
Ответ:
D. 36 units
Step-by-step explanation:
The description of the triangle is:
triangle XYW in which angle W is a right angle, angle X measure f degrees, and angle Y measures d degrees
Therefore, side XY is adjacent to f and side XY is the hypotenuse
From definition:
cos(f) = adjacent/hypotenuse
Replacing:
cos(f) = XW/XY
4/9 = 16/XY
XY = 16*9/4
XY = 36 units