Solve the problem.A pendulum bob swings through an arc 80 inches long on its first swing. Each swing thereafter, it swings only 86% as far as on the previous swing. What is the length of the arc after 11 swings? Round to two decimal places.
A. 15.23 inches
B. 13.09 inches
C. 17.70 inches
D. 688.00 inches
Answer: C
Mathematics
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A. 8.7 × 105 B. 8.7 × 104 C. 8.7 × 10-4 D. 8.7 × 10-5
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Solve the problem.If one must always move downward in the grid shown, how many paths are there from the highest point to the rightmost of the two low points?
A. 10 B. 12 C. 14 D. 8
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Solve the equation for solutions in the interval [0°, 360°).cos2 
= 1
A. ? = 0°, 45°, 90°, 135°, 180°, 225°, 270° B. ? = 0° C. ? = 0°, 90°, 180°, 270° D. ? = 33°, 57°, 123°, 147°, 213°, 237°, 303°, 327°
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Solve the equation.
- 
= 
A. -5, 5 B. -5 C. No solution D. 5
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