Function or not a function
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HELP/HURRY PLEASEEE!!!

Passengers usually start to board their flights 1 hour before the scheduled take off time. the gate will be closed 15 minutes before the takeoff time. jack’s plane is scheduled to take off at 12: 05 a.m. if he arrives at the gate at 11: 45 p.m., can he board the flight?

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

Use the graph of the sine function y=2sinθ shown below