Posted by **bob** on Sunday, October 2, 2011 at 2:15pm.

A hot air balloon is going up

ward at a constant speed of 3.5 m/s. When

it is 78 m above the ground, a package is

released from the balloon.

After it is released, for how long is the

package in the air? The acceleration of gravity

is 9.8 m/s2 .

Answer in units of s

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