Add. Simplify, if possible.
+ 
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Find the exact value of the given expression.
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Mathematics
Solve the problem.How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t) = 650e-0.189t, where t is the time in years? Round your answer to the nearest hundredth year.
A. 122.85 years B. 3.67 years C. 34.27 years D. 37.94 years
Mathematics
A point on the terminal side of angle ? is given. Find the exact value of the indicated trigonometric function of ?.(-15, 36) Find sin ?.
A. - 
B. 
C. - 
D. 
Mathematics
Determine which numbers in the set are solutions to the equation.28 - n = 24 ; {3, 4, 5}
A. 5 B. 3 C. 4 D. none of them
Mathematics