Jivesh is analyzing the flight of a few of his model rockets with various equations. In each equation, h is the height of the rocket in centimeters, and the rocket was fired from the ground at time t = 0, where t is measured in seconds.

Jivesh also has a more powerful Model B rocket. For this rocket, he uses the equation h = −810t^2 + 1,980t. When is the height of the Model B rocket 1,210 centimeters? Round your answers to the nearest hundredth.