dlencz wrote:I plugged in numbers and subtracted the area of the medallion from the area of the medallion and frame, which should just leave the value of the frame.
R = 4
S = 1
Area of both: 5^2л = 25л
Area of medallion: 4^2л = 16л
25л - 16л = 9л
A is the equation that gives me 9л when I plug in the numbers so I can't see why it's wrong. Can someone please explain?
This question is easy to misread.
r = the radius of the ENTIRE MEDALLION (the circular glass center AND the frame).
If r=4 and s=1, then the radius of the circular glass center = 4-1 = 3.
Thus:
The area of the frame = the area of the entire medallion - the area of the circular center = 16л - 9л = 7л.
Now we plug r=4 and s=1 into the answers to see which yields an area of 7л.
Only answer choice
E works:
лs(2r - s) = л(1)(2*4 - 1) = 7л.
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