Its 20 the sides are equal
        
                    
             
        
        
        
<u>7</u>  <u>35</u>   4x35/7= 20 lawns<u>
</u>4   x<u>
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Answer:
   (a)  4 seconds
Step-by-step explanation:
The given point (4, 0) on the parabola tells you the answer to the question: the coin was in the air 4 seconds before its height is 0. It is no longer in the air at that point.
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<em>Additional comment</em>
In order to match the rest of the problem statement, the first given x-intercept must be (-2, 0).