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2 years ago

PLEASE HELP ME ASAP!!! i need help!!!

Mathematics

2 answers:

AURORKA [14]2 years ago

8 0

Pls pls help I don’t have time HELP ASAP. It also detects if it’s right or wrong. Pls pls help I don’t have time HELP ASAP. It also detects if it’s right or wrong. Pls pls help I don’t have time HELP ASAP. It also detects if it’s right or wrong.

erica [24]2 years ago

3 0

Answer:

fourth option

Step-by-step explanation:

Using the sine and cosine ratios in the right triangle and exact values

sin60° = $\frac{\sqrt{3} }{2}$ , cos60° = $\frac{1}{2}$ , then

sin60° = $\frac{opposite}{hypotenuse}$ = $\frac{x}{4\sqrt{2} }$ = $\frac{\sqrt{3} }{2}$ ( cross- multiply )

2x = 4 $\sqrt{6}$ ( divide both sides by 2 )

x = 2 $\sqrt{6}$

---------------------------------------------------------

cos60° = $\frac{adjacent}{hypotenuse}$ = $\frac{y}{4\sqrt{2} }$ = $\frac{1}{2}$ ( cross- multiply )

2y = 4 $\sqrt{2}$ ( divide both sides by 2 )

y = 2 $\sqrt{2}$

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Read 2 more answers

A website manager has noticed that during the evening hours, about 5 people per minute check out from their shopping cart and m

Over [174]

Answer:

a) Poisson distribution

b) 99.33% probability that in any one minute at least one purchase is made

c) 0.05% probability that seven people make a purchase in the next four minutes

Step-by-step explanation:

In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:

$P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}$

In which

x is the number of sucesses

e = 2.71828 is the Euler number

$\mu$ is the mean in the given time interval.

5 people per minute check out from their shopping cart and make an online purchase.

This means that $\mu = 5$

a) What model might you suggest to model the number of purchases per minute? 

The only information that we have is the mean number of an event(purchases) in a time interval. Each event is also independent fro each other. So you should suggest the Poisson distribution to model the number of purchases per minute.

b) What is the probability that in any one minute at least one purchase is made? 

Either no purchases are made, or at least one is. The sum of the probabilities of these events is 1. So

$P(X = 0) + P(X \geq 1) = 1$