Solve the Problem $$H ( x ) = 80 - 4.9 x ^ { 2 }$$

question 165

Multiple Choice

Solve the problem.
-If a rock falls from a height of 80 meters on Earth, the height H (in meters) after x seconds is approximately $$H ( x ) = 80 - 4.9 x ^ { 2 }$$ What is the height of the rock when x = 1.5 seconds? Round to the nearest hundredth, if necessary.

• A) 72.65 m
• B) 68.98 m
• C) 91.03 m
• D) 69.2 m

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