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Chapter 6: Q. 76 (page 698)

A girl drops a ball off a cliff into the ocean. The polynomial 鈭�16t2+250gives the height of a ball t seconds after it is dropped from a 250-foot tall cliff. Find the height aftert=2 seconds.

Short Answer

Expert verified

The height of the ball after 2 seconds is 186 feet.

Step by step solution

01

Step 1. Given information. 

The height of the ball after t seconds is:

-16t2+250

The given time is t=2seconds.

02

 Step 2. Evaluate the expression for the given value.

Substitute t=2in the given expression.

localid="1656433186496" -16(2)2+250=-16(4)+250=-64+250=186

03

Step 3. Conclusion.

The height of the ball after 2 seconds is 186 feet.

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