Help!! will give brainliest to a answer with explanation!

Landon wrote that 3−2.6=4. which statement about his answer is true?

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2

Aremote-controlled boat can travel at 4 feet per second in calm water. the boat traveled 48 feet with the current, and then it traveled 16 feet against the current in the same amount of time. how fast is the current?