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Korvikt [17]
3 years ago
15

1. A scuba diver is swimming around a coral reef 12.25 meters below sea level. He ascends (swims upward) 8.5 meters to look at a

sea turtle. Write an expression to describe the situation. What is his new position? Explain how you wrote the expression and solved the problem.
2. A scuba diver is 9 1/2 feet below sea level viewing some tropical fish. She descends (swims downward) 10 1/2 feet to get a closer look at a manta ray swimming on the sea bottom. Write an expression to describe the situation. What is her new position? Explain how you wrote the expression and solved the problem.
Mathematics
1 answer:
bekas [8.4K]3 years ago
8 0

His new position is 3.75 meters 12.25 - 8.5 = 3.75.

Her new position is 20 ft 9 1/2 + 10 1/2 = 20.

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Alex

Answer:

The correct option is C ) 109.5°

Therefore,

m\angle E=109.5\°

Step-by-step explanation:

Given:

In Triangle DEF

d = 10

e = 18

f = 12

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angle E = ?

Solution:

In Triangle DEF , Cosine Rule says

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Substituting the values we get

\cos E=\dfrac{12^{2}+10^{2}-18^{2}}{2\times 12\times 10}

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Therefore,

\angle E=\cos^{-1}(-0.3333)

m\angle E=109.5\°       ............As it is in Second Quadrant

Therefore,

m\angle E=109.5\°

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