Solve the problem.An object is traveling around a circle with a radius of 10 centimeters. If in 20 seconds a central angle of 
radian is swept out, what is the linear speed of the object?
A. 6 cm/sec
B. 6 radians/sec
C. 
cm/sec
D. 
radians/sec
Answer: C
Mathematics
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Determine if the given set of whole numbers is closed under addition.{2, 4, 6, 8, . . . }
A. Not closed B. Closed
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Plot the point given in polar coordinates.
A. 
B. 
C. 
D. 
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Decide whether the relation is a function.?
A. Function B. Not a function
Mathematics
Solve.There are currently 68 million cars in a certain country, increasing exponentially by 7.2% annually. How many years will it take for this country to have 77 million cars? Round to the nearest year.
A. 3 yr B. 1 yr C. 2 yr D. 31 yr
Mathematics