Math Challenge

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Please help if can with the following problem, I have submitted the answers to the other problems like this one and were told they were incorrect.

I was excited and greatful for receiving both answers because I have no clue how to work the problem.

1st answer I turned in was 88.2 meters
2nd answer I turned in was 78.4 meters


It Says....
If you do not consider air resistance, gravity causes a falling object to descend a distance of (9.8)t2 where
t is the time in seconds. If a 16 pound bowling ball is dropped from the tallest building in the world, how many meters does it fall during the 4th and 5th seconds combined.

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