Use a sum or difference identity to find the exact value.tan 
A. 2 - 
B. - 2 - 
C. 2 + 
D. - 2 + 
Answer: A
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Solve the problem. Round your answer to two decimal places.Scores on a test are normally distributed with a mean of 78 and a standard deviation of 6. What is the standard score for an exam score of 73 ?
A. -0.86 B. -1.2 C. 0.86 D. -0.83
Solve for x. Be sure to reduce your answer. Check your solution.-2x = 12
A. x = -6 B. x = 1 C. x = -14 D. x = 14
A bacteria culture had a population of 13 million at 10:00 A.M., and by 2:00 P.M. had grown to 21 million. Predict the population at 6:00 P.M. that same day. ?
A. 35.2 million B. 35.6 million C. 31.5 million D. 29.6 million E. 33.9 million
Solve the problem.In a 1-mile race, the winner crosses the finish line 15 feet ahead of the second-place runner and 28 feet ahead of the third-place runner. Assuming that each runner maintains a constant speed throughout the race, by how many feet does the second-place runner beat the third-place runner? (5280 feet in 1 mile.)
A. -15.08 ft B. -2.01 ft C. 13.04 ft D. -13.07 ft