A ball thrown upwards hits a roof and returns back to the ground. The upward movement is modeled by a function
s= −(t^2)+3t+4
and the downward movement is modeled by
s= −2(t^2)+t+7, where s is the distance (in metres) from the ground and t is the time in seconds.

Find the height of the roof from the ground.

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segment bisector

step-by-step explanation:

line segment bisector. definition: a line, ray or segment which cuts another line segment into two equal parts. try this drag one of the orange dots at a or b and note the the line ab always divides the line pq into two equal parts.

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