Find the measure of the indicated angle. Figure is not drawn to scale.Four angles are formed by the intersecting lines. Find the measures of ?A and ?B. 
A. m?A = 24°, m?B = 156°
B. m?A = 21°, m?B = 159°
C. m?A = 44°, m?B = 316°
D. m?A = 10°, m?B = 80°
Answer: B
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Solve the problem.Assume that the profit P made when t units are sold, t > 0, is given by P(t) = t2 - 28t + 180. For what values of t will there be a loss (that is, P < 0)?
A. t > 0 B. 0 < t < 10 or t > 18 C. 10 < t < 18 D. t = 10 or t = 18
Find all solutions of the equation in the interval [0, 2?).cos2 x - 1 = 0
A. 
B. {0}
C. {0, ?}
D. 
Solve the problem.The voltage across a resistor is jointly proportional to the resistance of the resistor and the current flowing through the resistor. If the voltage across a resistor is 
for a resistor whose resistance is 
and when the current flowing through the resistor is 
find the voltage across a resistor whose resistance is 
/> and when the current flowing through the resistor is 
A. 48 volts
B. 24 volts
C. 18 volts
D. 42 volts
Convert the angle between radian and degree measures. Express radians in terms of ? and round degrees to two decimals, when necessary.- 
A. -30° B. -60° C. -40° D. -120°