A cannonball is shot out of a cannon at a 45° angle with an approximate speed of 283m/s. The cannon from which the ball was fired sits on the edge of a cliff, and itsheight above the ground is 20 meters. The equations given above represent the cannonball'sheight above the ground (y) and its horizontal distance (from the face of the cliff, t seconds after it was fired, where t ≥ 0. How many seconds after the ball was fired does its vertical height above theground equal its horizontal distance from the cliff?
A. 1
B. 2
C. 3
D. 4
Answer:B
A cannonball is shot out of a cannon at a 45° angle with an approximate speed of 283m/s. The cannon from which the ball was fired sits on the edge of a cliff, and itsheight above the ground is 20 meters. The equations given above represent the cannonball'sheight above the ground (y) and its horizontal distance (from the face of the cliff, t seconds after it was fired, where t ≥ 0. How many seconds after the ball was fired does its vertical height above theground equal its horizontal distance from the cliff?
A. 1 B. 2 C. 3 D. 4
Explanation: B