Solve the problem. Express the answer as a percentage.A coin is biased to show 39% heads and 61% tails. The coin is tossed twice. What is the probability that the coin turns up tails on both tosses?
A. 61%
B. 37.21%
C. 22%
D. 39%
Answer: B
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Evaluate the expression.
A. 
B. 
C. 
D. 5
E. -5
Solve the problem.The pressure of oxygen gas in a closed container can be described approximately by the Dieterici equation P = 
e-0.0006/T,where T is the Kelvin temperature of the sample and v is the volume in liters.If 
and 
, in what "direction" should we change (v, T) to make the pressure increase as rapidly as possible?
A. In the direction 
B. In the direction 
C. In the direction 
D. In the direction 
Solve the system of equations.x + 3y + 2z = -26 3y + 2z = -23 z = -4
A. {(-3, -4, -5)} B. ? C. {(-4, -5, -3)} D. {(-3, -5, -4)}
Solve using the elimination method. x + 9y = 352x + 9y = 34
A. (1, 3) B. No solution C. (-1, 4) D. (0, -1)