3 years ago

Please help me this is due in 30 minutes

Mathematics

2 answers:

Leya [2.2K]3 years ago

8 0

Answer:

Step-by-step explanation:

ra1l [238]3 years ago

4 0

1. A
2. C
3. C
4. A

I’m not so sure about number 4 tho!!

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protocol for flushing a cooling water system at a nuclear reactor requires that a drain valve be opened while the fill pumps are

Lyrx [107]

Answer:

Step-by-step explanation:

drain empties 1/10 of the desired amount per minute

pump fills 1/14 of the desired amount per minute

when both are active, the net drain is 1/10-1/14 = 1/35 of the desired amount per minute

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3 years ago

Solve for x in the given interval.<br><br> sec x= -2√3/3, for π/2 ≤x≤π

drek231 [11]

Answer:

b. $x=\frac{5\pi}{6}$

Step-by-step explanation:

The given function is

$\sec x=-\frac{2\sqrt{3} }{3},\:\:for\:\:\frac{\pi}{2}\le x \le \pi$

Recall that the reciprocal of the cosine ratio is the secant ratio.

This implies that;

$\frac{1}{\cos x}=-\frac{2\sqrt{3} }{3}$

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$\Rightarrow \cos x=-\frac{\sqrt{3}}{2}$

We take the inverse cosine of both sides to obtain;

$x=\cos^{-1}(-\frac{\sqrt{3}}{2})$

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3 years ago

What is 40 meters in 8 seconds?

kirill [66]

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3 years ago

HELP!!!!!!!!!!!!!! ILL GIVE BRAINILIST

Scorpion4ik [409]

$\frac{1}{3} \div \frac{4}{5} \\ \\ \frac{1}{3} \times \frac{5}{4} \\ \\ \frac{1 \times 4}{3 \times 4} \times \frac{5 \times 3}{4 \times 3} \\ \frac{4}{12} \times \frac{15}{12} \\ \frac{4 \times 5}{12} \\ \frac{60}{12} \\ 5 \: \: \: \: answer$

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2 years ago