Solve the problem.The number of ducks (in thousands) counted at a certain checkpoint in their migration is given by 
where t is time in months and t = 0 is October. Find the number of ducks passing the checkpoint between October and January.
A. 17,618
B. 24,549
C. 20,000
D. 24,536
Answer: B
Mathematics
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Solve for the angle ?, where 0 ? ? ? 2?sin 2? - cos ? = 0
A. 0, 
, ?, 
, 2?
B. ? = 
, 
, 
, 
C. ? = 
, 
, 
, 
D. 
, 
, 
, 
Mathematics
An glass of wine has a pH of 4.75. Find the hydrogen ion concentration of this solution.
A. 4.75 mol/L [H+] B. 5.62 × 10-10 mol/L [H+] C. 1.78 × 10-5 mol/L [H+] D. 1.78 mol/L [H+]
Mathematics
Multiply or divide.(-10)(4)
A. -44 B. 30 C. -30 D. -40
Mathematics
Verify that the values of the variables listed are solutions of the system of equations.
x = -6, y = -3
A. solution B. not a solution
Mathematics