2 years ago

Please help meeee like right nowww

Mathematics

1 answer:

ipn [44]2 years ago

7 0

Answer: #3

Step-by-step explanation:

Each dash represents 3 so count 3 dashes on each side of zero to find your answer.

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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

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anyanavicka [17]

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2 years ago

6x-9=y ; y=-3x linear equations solution for x and y I need help can someone explain

snow_lady [41]

The answer is
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3 years ago

A car is a vehicle with four wheels.

Alchen [17]

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If a vehicle does not have 4 wheels, it is not a car.

Dont forget to give brainliest and thanks

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3 years ago

On a fishing trip, mark caught twenty - four fish. He caught some rock fish averaging 2.5 pounds and some blue fish averaging 8

zloy xaker [14]

He cause 14 blue fish and 10 rock fish
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