Solve the Problem $$H ( x ) = 30 - 4.9 x ^ { 2 }$$

question 19

Multiple Choice

Solve the problem.
-If a rock falls from a height of 30 meters on Earth, the height H (in meters) after x seconds is approximately $$H ( x ) = 30 - 4.9 x ^ { 2 }$$ What is the height of the rock when x = 1.9 seconds? Round to the nearest hundredth, if necessary.

• A) 20.69 m
• B) 12.67 m
• C) 12.31 m
• D) 47.69 m

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