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2 years ago

12

A class has 50 students. use the third row of digits in the random number table below to select a simple random sample of three

students. if the students are numbered 01 to 50, what are the numbers of the three students selected

1 answer:

nadya68 [22]2 years ago

6 0

You probably already got the answer to this but where is the graph?

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Which will result in a perfect square trinomial?

nikitadnepr [17]

Answer:

The first one

Step-by-step explanation:

For the first choice, the binomial is multiplied by itself, so it will result in a perfect square trinomial.

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Inessa05 [86]

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2 years ago

The burning time of a very large candle is normally distributed with mean of 2500 hours and standard deviation of 20 hours. Find

dezoksy [38]

Answer: C.-1.5

Step-by-step explanation:

Given: The burning time of a very large candle is normally distributed with mean $(\mu)$ of 2500 hours and standard deviation $(\sigma)$ of 20 hours.

Let X be a random variable that represent the burning time of a very large candle.

Formula: $Z=\dfrac{X-\mu}{\sigma}$

For X = 2470

$Z=\dfrac{2470-2500}{20}\\\\\Rightarrow\ Z=\dfrac{-30}{20}\\\\\Rightarrow\ Z=\dfrac{-3}{2}\\\\\Rightarrow\ Z=-1.5$

So, the z-score they corresponds to a lifespan of 2470 hours. =-1.5

Hence, the correct option is C.-1.5.

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2 years ago

Find the slope of the graph below.

satela [25.4K]

The equation is y=x+3

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2 years ago

The difference between a number and its square is 20. Find the<br>numbers.

Elena L [17]

Answer:

-4 or 5

Step-by-step explanation:

let number be x

x²-x=20

Rearrange

x²-x-20=0

(x+4)(x-5)=0

Separate

x+4=0, x-5=0

x=-4 or 5

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2 years ago