The outside temperature at noon was 9 F. The temperature dropped 15 degrees during the afternoon. What was the new temperature?
2 answers:
You might be interested in
Answer:
bottom side (a) = 3.36 ft
lateral side (b) = 4.68 ft
Step-by-step explanation:
We have to maximize the area of the window, subject to a constraint in the perimeter of the window.
If we defined a as the bottom side, and b as the lateral side, we have the area defined as:
The restriction is that the perimeter have to be 12 ft at most:
We can express b in function of a as:
Then, the area become:
To maximize the area, we derive and equal to zero:
Then, b is:
This uses the properties of a 30-60-90 triangle. the 90 m is opposite the 60 degree angle to convert to the side opposite the 30 divide 90 by 
90 / = 51.96 m or B
90 /