Solve
-A Ball Is Thrown Downward with an Initial Velocity $h = - 4.9 t ^ { 2 } - 28 t + 120$

question 210

Multiple Choice

Solve.
-A ball is thrown downward with an initial velocity of 28 meters per second from a cliff that is 60 meters high. The height of the ball is given by the quadratic equation $h = - 4.9 t ^ { 2 } - 28 t + 120$ where $\mathrm { h }$ is in meters and $\mathrm { t }$ is the time in seconds since the ball was thrown. Find the time that the ball will be 60 meters from the ground. Round your answer to the nearest tenth of a second.

• A) \(2.7 \mathrm { sec }\)
• B) \(1.7 \mathrm { sec }\)
• C) \(1.8 \mathrm { sec }\)
• D) \(1.6 \mathrm { sec }\)

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Definitions:

Lowest Terms

The simplest form of a fraction when both the numerator and denominator cannot be any smaller while still being whole numbers.

Ratio

An arithmetic ratio that illustrates the frequency with which one number incorporates another, depicting how many times one value is contained within another.

Equivalent Ratio

Ratios that express the same relationship between numbers, despite being scaled differently.

Smallest Term

The minimum value or term in a set, sequence, or collection of numbers or values.