Which value of m makes the equation true an equation is shown. m^2=28

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?

How many zeros does the function f(x)=4x3-x2+1 have

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)