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3 years ago

I’m confused on this one

Mathematics

1 answer:

nikklg [1K]3 years ago

6 0

2·(2 + 9 + 2/SIN(30°)) = 30

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Olivia is making scarves each scarf will have 5 rextangles and 2/5 of the rectangles will be purple .How many purple rectangles

SIZIF [17.4K]

She will need 6 purple rectangles

6 0

3 years ago

The random variable x is the number of occurrences of an event over an interval of ten minutes. It can be assumed that the proba

Olegator [25]

Answer:

The probability that occurrence of 8 in ten minutes is 0.0771.

Step-by-step explanation:

Poisson Distribution:

A discrete random variable X having the enumerable set {0,1,2,.....} as the spectrum, is said to have Poisson distribution with parameter $\mu$ (>0), if the p.m.f is given by

$P(X=x)=\frac{e^{-mu}\mu^x}{x!}$ for x=0,1,2,...

= 0, elsewhere

The mean number of occurrences in ten minutes is 5.3.

Here $\mu$ = 5.3 and x= 8

$P(X=8)=\frac{e^{-5.3}(5.3)^8}{8!}$

=0.0771

The probability that occurrence of 8 in ten minutes is 0.0771.

3 0

3 years ago

The proportion of the total area under a normal curve between two z-scores corresponds to the ______ of that range of scores.

omeli [17]

Answer:

For any normal distribution, the mean and the median will have the same value. For any normal distribution, the proportion corresponding to scores greater than z = +1.00 is exactly equal to the proportion corresponding to scores less than z = -1.00.

Step-by-step explanation:

5 0

2 years ago

What is the measure of b if a=20 and c=29. using the pythagorean theorem

kicyunya [14]

Since a^2+b^2=c^2 becomes 20^2+b^2=29^2, we solve for b:

400+b^2=841

b^2=441

b=21

So the length of b is 21 units.

Hope this helped!

5 0

3 years ago

Read 2 more answers

Expand.<br>Your answer should be a polynomial in standard form.<br>(79 +3)(-9 – 3) =

enot [183]

Answer:

(79+3)(−9−3)

=82(−9−3)

=(82)(−12)

=−984

8 0

2 years ago