Near the earth's surface every particle experiences a constant acceleration of 32 ft/sec^2 directed toward the center of the earth; if "up" is considered the positive direction, then this is an acceleration of -32ft/sec^2. Consider a rock thrown straight up in the air from the ground. Let's denote time t=0 as the time when the rock reaches 12 feet up in the air at (upward) velocity of 4 feet per second. Fill in the following with numbers that differ from the correct value by no more than .1 units.
The rock left the ground (was thrown up in the air) at time t= ? seconds, with initial velocity of ? feet per second. It will fall back to the ground at time t= ? second after reaching the maximum height of ? feet at time t= ? seconds.