Sheldоn is stаnding оn а flаt field and is gоing to throw a rock straight up into the air. When he throws the rock, the function h(t)=-5t2+30t{"version":"1.1","math":"h(t)=-5t2+30t"} models the height, h{"version":"1.1","math":"h"}, of the rock above ground as a function of time, t{"version":"1.1","math":"t"}. Find the time(s) that the rocket will be 25 meters above the ground.