Answer the question.The central angle of a regular polygon is an angle with vertex at the center of the polygon.Number of sides:4568Central angle:90°72°60°45°What is the measure of the central angle of a regular polygon with 9 sides?
A. 40°
B. 38°
C. 48°
D. 42°
Answer: A
Mathematics
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Simplify the expression.36-3/2
A. 216
B. - 
C. -216
D. 
Mathematics
Solve the problem.The function N(t) = 
, t ? 8gives the body concentration N(t), in parts per million, of a certain dosage of medication after time t, in hours.Graph the function on the interval [8, ?) and complete the following:N(t) ? 
as t ? ?.
A. 
N(t) ? 1 as t ? ?.
B. 
N(t) ? 0.083 as t ? ?.
C. 
N(t) ? 0.071 as t ? ?.
D. 
N(t) ? 0 as t ? ?.
Mathematics
Evaluate the expression without using a calculator.84/3
A. 64 B. 16 C. 32 D. 128
Mathematics
Determine whether the equation defines y as a function of x. y2 + x = 2
A. function B. not a function
Mathematics