Simplify.
A. 24
B. -72
C. -24
D. 72
Answer: B
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Solve the problem.Island A is 150 miles from island B. A ship captain travels 250 miles from island A and then finds that he is off course and 160 miles from island B. What angle, in degrees, must he turn through to head straight for island B? Round the answer to two decimal places. (Hint: Be careful to properly identify which angle is the turning angle.)
A. 34.92° B. 110.17° C. 55.08° D. 145.08°
Solve the problem.If the resistance in an electrical circuit is held constant, the amount of current flowing through the circuit is directly proportional to the amount of voltage applied to the circuit. When 
are applied to a circuit, 
(mA) of current flow through the circuit. Find the new current if the voltage is increased to 
A. 18 mA B. 100 mA C. 81 mA D. 90 mA
Find the inverse of the matrix. 
A. 
B. 
C. 
D. 
Simplify.-7 + 12 ? 11 - 4
A. 12 B. 35 C. 121 D. 51