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nignag [31]
3 years ago
7

F(X)=2x^2 +1 find and simplify:: if f(a) =19 find a. Isn't a just 19??

Mathematics
1 answer:
liberstina [14]3 years ago
5 0
2a^2+1=19\\
2a^2=18\\
a^2=9\\
a=-3 \vee a=3
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Answer:

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The boat's travel from when it was first noticed until it stopped is 554.89 ft.

<h3>What is trigonometry?</h3>

Trigonometry is a branch of mathematics that deals with the relationship between sides and angles of a right-angle triangle.

We have:

A person is watching a boat from the top of a lighthouse. The boat is approaching the lighthouse directly.

From the given information we can draw a right-angle triangle.

14°52' = 14 + 0.86 = 14.86 degree

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In the right-angle triangle ACD

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Thus, the boat's travel from when it was first noticed until it stopped is 554.89 ft.

Learn more about trigonometry here:

brainly.com/question/26719838

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Normally, to calculate 55.5 percent, you would multiply a number by 55.5 percent and then you would take the product of that and divide it by 100 to get the answer.

Instead, you can simply multiply a number by 55.5 as a decimal to get the answer.

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