Posted by **Anonymous** on Tuesday, November 22, 2011 at 12:50pm.

A hot air balloon is traveling vertically upward at a constant speed of 3.9 m/s. When

it is 10 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/s

2

.

Answer in units of

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