Step-by-step explanation:
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Each bottle serves 2 students. He needs to buy 14/2 = 7 bottles.
Answer: c did on a p e x
Step-by-step explanation:
X—>-infinity f(x)—>-infinity
X—>infinity f(x)—> 12
Sinx=1/2
sin30=1/2
therefore x=30 degree