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lyudmila [28]
3 years ago
9

100 POINTS pleasee i need help and explain too

Mathematics
2 answers:
julsineya [31]3 years ago
5 0

Answer:

\frac{3 \sqrt{5} }{10}

Step-by-step explanation:

Given the expression:

\frac{3 \sqrt{20} }{5 \sqrt{16} }

The expression can be written in the form below:

=  \frac{3 \sqrt{4 \times 5} }{5 \sqrt{4 \times 4} }

Simplify further:

=  \frac{3 \times  \sqrt{4 \times   \sqrt{5} } }{5 \times 4}  \\  =  \frac{3 \times 2 \times  \sqrt{5} }{5 \times 4}  \\  =  \frac{6 \sqrt{5} }{20}  \\  =  \frac{3 \sqrt{5} }{10}

The correct choice is B.

marysya [2.9K]3 years ago
4 0
The answer is b to be sure
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Answer:

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Dolphin is 30 feet below the surface of the water, then its position on the vertical number line is -30.

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