I got 13.14 for f, since the scale factor is 1.75.
A.
csc is equal to the opposite divided by the hypotenuse.
Answer: 154
<span>In one side of the glass window measuring 3 ½ feet, we can make (3.5/.25) exactly 14 pieces of a ¼ foot.</span>
The other side of the glass window which measures 2 ¾ feet we can produce (2.75/,25) or 11 pcs of a ¼ foot.
<span>The artist used (14*11) or 154 colored squares.</span>
