A package for perfumed soap beads is in the shape of a triangular prism with equilateral triangles as its bases. The package shown below can be formed from a sheet of plastic cut in the shape of the prism's net.

2nd one in the first row is correct

yx = 36

step-by-step explanation:

cos f = opposite side/ hypotenuse

cos f = yw / yx

we know cos f = 4/9 and yw =16

4/9 = 16/yx

multiply each side by yx

4/9 yx = 16/ yx * yx

4/9 yx = 16

multiply each side by 9/4

9/4 * 4/9 yx = 16 *9/4

yx = 36

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