Solve the equation for complex solutions.x2 + x + 4 = 0
A. - 
± 
B. - 
± 
i
C. 
± 
i
D. 
± 
Answer: B
Mathematics
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Solve.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) ? 0 as t ? ?.
B. 
N(t) ? 1 as t ? ?.
C. 
N(t) ? 0.1 as t ? ?.
D. 
N(t) ? 0.125 as t ? ?.
Mathematics
Factor completely.3x2 - 15x + 18
A. (3x - 6)(x - 3) B. 3(x - 2)(x - 3) C. 3(x - 6)(x + 1) D. Prime
Mathematics
Solve for x. Be sure to reduce your answer. Check your solution.
= 13
A. x = 16 B. x = 15 C. x = 4 D. x = 39
Mathematics
Evaluate the logarithm without using a calculator.log4 64
A. 12 B. 4 C. 64 D. 3
Mathematics