A base ball is thrown off a building 320 feet high at an initial upward speed 3 of 80 feet per second: the height of the baseball relative to the ground is modeled by F(X) = -16T^2 + 80T + 320. How long does it take the baseball to reach its highest point? 4.2 seconds 4 seconds O 7.6 seconds 2.5 seconds 5.2 seconds 1,137 6.

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