If a Rocket Is Fired Vertically into the Air with a Speed

question 184

Multiple Choice

If a rocket is fired vertically into the air with a speed of feet per second, its height at time t seconds is given by . Here is a graph of its height at various times, with the details left out. How long will the rocket be in the air? ( Hint : How high is it when it hits the ground?)

• A)20 seconds
• B)16 seconds
• C)24 seconds
• D)15 seconds
• E)14 seconds

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Definitions:

EAR

Effective Annual Rate, the actual return on an investment or the actual interest rate on a loan over one year, including compounding.

APR

Annual Percentage Rate, a comprehensive measure of the cost of borrowing on an annual basis, including interest and fees.

Effective Annual Rate

The real interest rate on an investment or loan, considering the effects of compounding over a one-year period.