Evaluate without using a calculator by using ratios in a reference triangle.sec 150°
A. 
B. 
C. - 
D. - 
Answer: D
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Determine all pairs (x, y) of integer values of x and y that satisfy the equation.|x| + |y| = 1
A. (0, 1), (0, -1), (1, 0), (-1, 0), (1, -1), (-1, 1) B. (0, 1), (1, 0) C. (0, 1), (0, -1), (1, 0), (-1, 0), (1, -2), (-1, 2), (2, -1), (-2, 1) D. (0, 1), (0, -1), (1, 0), (-1, 0)
Write the fraction as a percent. If necessary, round the percentage to the nearest tenth.
A. 160% B. 320% C. 16% D. 50%
Rewrite the expression as the sum and/or difference of logarithms, without using exponents. Simplify if possible.log2
A. 8 log2x + 7 log2y + log25 B. (8 log2x)(7 log2y) - log25 C. 8 log2x - 7 log2y - log25 D. 8 log2x + 7 log2y - log25
Solve the problem.The formula 
models the safe maximum speed, v, in miles per hour, at which a car can travel on a curved road with radius of curvature, r, in feet. A highway crew measures the radius of curvature at an exit ramp as 360 feet. What is the maximum safe speed?
A. 27 mph B. 35 mph C. 36 mph D. 30 mph