Use an identity to write the expression as a single trigonometric function or as a single number.
A. tan 30°
B. sin 30°
C. cos 30°
D. cot 30°
Answer: B
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Solve the equation.
= 6
A. {18} B. {1} C. {6} D. {12}
Divide and reduce to lowest terms.
÷ 
A. 
B. 
C. - 
D. 
Solve the problem.The formula 
can be used to estimate the maximum safe velocity v, in miles per hour, at which a car can travel along a curved road with a radius of curvature r, in feet. To the nearest whole number, find the radius of curvature if the maximum safe velocity is 20 miles per hour.
A. 160 ft B. 400 ft C. 1000 ft D. 64 ft
Solve the problem.The final grade for an algebra course is determined by grades on the midterm and final exam. The grades for four students and two possible grading systems are modeled by the following matrices. src="https://sciemce.com/media/4/ppg__yrty0513191737__f1q44g6.jpg" style="vertical-align: -15.0px;" />Find the final course score for Student 3 for both grading System 1 and System 2.
A. System 1: 63.6; System 2: 94.4
B. System 1: 79.8; System 2: 79
C. System 1: 44.2; System 2: 53
D. System 1: 77.2; System 2: 76
