Solve the right triangle shown in the figure.  ?A = 45°,  = 14 km, ?C = 90°

A.  = 14 km, ?B = 45°,  = 7 km
B.  = 14 km, ?B = 45°,  = 14 km
C.  = 7 km, ?B = 45°,  = 14 km
D.  = 14 km, ?B = 45°,  = 14 km


Answer: D

Mathematics

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Is the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10} a group for multiplication modulo 11? ? ?

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Solve the problem.The radiator in a certain make of car needs to contain  of 40% antifreeze. The radiator now contains  of 20% antifreeze. How many liters of this solution must be drained and replaced with 100% antifreeze to get the desired strength?

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Mathematics