Solve the problem using Snell's Law: 
= 
.A light beam traveling through air makes an angle of incidence of 47° upon a second medium. The refracted beam makes an angle of refraction of 33°. What is the index of refraction of the material of the second medium? Give the answer to two decimal places.
A. 0.54
B. 1.34
C. 0.73
D. 0.74
Answer: B
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Solve the problem.A sprinkler rotates back and forth through an angle ?, as shown in the figure. At a distance of 4 feet from the sprinkler, the rays that form the sides of angle ? are 8 feet apart. Find ?.
A. 63° B. 45° C. 90° D. 32°
Find the solution.4(x + 4) = 28
A. 20 B. 3 C. 11 D. -3
Solve the problem.The formula for the area of a parallelogram is A = bh. Use this formula to write an equation for the area when the base b measures 29 inches, and the altitude is h. Determine the area of the parallelogram when the altitude is 27 inches.
A. A = 29h; 112 sq. in. B. A = 29 + h; 783 sq. in. C. A = 29 + h; 56 sq. in. D. A = 29h; 783 sq. in.
Write the first four terms of the sequence.{(-3)n}
A. -3, -9, -27, -81 B. 3, -9, -27, -81 C. 3, -9, 27, -81 D. -3, 9, -27, 81