If a certain cannon is fired from a height of 9.8 meters above the ground, at a certain angle, the height of the cannonball above the ground, h, in meters, at time, t, seconds, is found by the function h(t)=-4.9t²+27.5t+9.8. Find the time it takes for the cannonball to strike the ground. The cannonball will strike the ground after about ___ seconds.
(Type an integer or a decimal. Round to the nearest hundredth as needed.)