4 years ago

The length of the hypotenuse of a 30-60-90 triangle is 15. Find the perimeter.

Mathematics

1 answer:

Arisa [49]4 years ago

8 0

Check the picture below.

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Answer:

Step-by-step explanation:

Given that that (X) the amount of time lapsed between consecutive trades on the New York Stock Exchange followed a normal distribution with a mean of 15 seconds.

i.e. X is normal with mean = 15 and unknown std deviation $\sigma$

Given that $P(X$

i.e. P( $z$

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Hence $\frac{13-15}{\sigma}=-1.475\\\sigma = 1.356$

Using this we find P(X>17) = $P(Z>\frac{17-15}{1.356} \\=P(Z>1.475)\\=0.5-0.428\\=0.072$

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3 years ago

3/2a - ab + 1 (if a = 5/6 and b = 3/10)

dedylja [7]

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Step-by-step explanation:

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