Decide whether the given set of numbers is a group under the given operation.Natural numbers; addition
A. Yes
B. No
Answer: B
Mathematics
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Write the standard form of the equation of the circle. 
A. (x - 5)2 + (y - 6)2 = 4 B. (x + 5)2 + (y + 6)2 = 4 C. (x - 5)2 + (y - 6)2 = 2 D. (x + 5)2 + (y + 6)2 = 2
Mathematics
Change the exponential expression to an equivalent expression involving a logarithm.2.3x + 5 = 15
A. log2.3 15 = x + 5 B. log2.3 x = 10 C. log15 (x + 5) = 2.3 D. log(x + 5) 15 = 2.3
Mathematics
Solve the problem.Jeff earns $218 per day. If his salary is raised by 9%, how much will he make per day?
A. $239.80 B. $237.62 C. $235.44 D. $414.20
Mathematics
Use the basic trigonometric identities to find the exact value of the expression.Given tan t = -9 and cos t > 0, find sec t.
A. sec t = 8
B. sec t = 10
C. sec t = 
D. sec t = 4
Mathematics