Express using positive exponents. Then, if possible, simplify.
A. 6x2
B. 
C. 2x-6
D. 2x6
Answer: D
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Find the sample standard deviation.15, 16, 17, 18, 19
A. 1.6 B. 1.3 C. 2.5 D. 1.5
Add and subtract as indicated.-8 + 12 - (-20)
A. -16 B. -40 C. 24 D. -24
Solve the problem.You drive 93 miles along a scenic highway and then take a 25-mile bike ride. Your driving rate is 3 times your cycling rate. Suppose you have no more than a total of 5 hours for driving and cycling. Let x represent your cycling rate in miles per hour. Use a rational inequality to determine the possible values of x.
A. x ? 11.2 mph B. x ? 20.3 mph C. x ? 11.2 mph D. x ? 69.2 mph
Use a calculator to solve the equation on the interval 0 ? ? < 2?. Round the answer to two decimal places.sin ? = 0.26
A. {0.26, 1.83} B. {0.26, 2.88} C. {0.26, 6.02} D. {0.26, 3.40}