Question

What is the value of w? A. 7 B. 3.5 C. 7square root of three D. 14

Answer 1

Answer:

D. 14.

$\sf{\cos(30) = \frac{7 \sqrt{3} }{w} } \\ \sf{ \frac{ \sqrt{3} }{2} = \frac{7 \sqrt{3} }{w} } \\ \sf{w = \frac{7 \sqrt{3} \times 2 }{ \sqrt{3} } = 14}$