Can someone help me?2b²+17b+21Thanks
2 answers:
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Answer:
c. 6.5 seconds.
Step-by-step explanation:
We have been given that a a paper plane is thrown from the top of a 147-foot cliff into the water below, the height of the plane at any given time can be determined by the formula , where h is the height of the plane at t seconds.
To find the time, when plane will be at a height of exactly 20.25 feet, we will substitute in our given formula and solve for t as:
Take square root of both sides:
Since time cannot be negative, therefore, the plane will be at a height of exactly 20.25 feet after 6.5 seconds and option 'c' is the correct choice.
The given expression written in the simplest rational exponent form is
From the question, we are to write the given expression in exponent form
The given expression is
In exponent form,
and
Thus, becomes
Applying the multiplication law of indices, we get
=
Hence, the given expression written in the simplest rational exponent form is
Learn more on Writing an expression in exponent form here: brainly.com/question/4421494
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