A rolled-up T-shirt is launched from a T-shirt cannon during halftime at a football game. It is launched upward from a height of 5 feet with an initial upward velocity of 56 feet per second. The path of the T-shirt cannon can be modeled by the function , where t represents the time in seconds and h(t) represents the height in feet of the t-shirt. Determine when the T-shirt is above 40 feet.