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MatroZZZ [7]
2 years ago
7

Please help I need help in order to pass math

Mathematics
1 answer:
storchak [24]2 years ago
3 0

Answer:

....bbbbbb.... its correct

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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.

7 0
2 years ago
2.74 as a mix number
Inga [223]

Answer:

2 74/100

Step-by-step explanation:

6 0
3 years ago
PLEASE HELP NOW I NEED HELP
MariettaO [177]

Answer:

4.5

Step-by-step explanation:

If 2/5 is blue, that means 3/5 is white. Now I convert it to a decimal: 0.6. That means 60% of the paint is white, so I can do 7.5*0.6 to find how much white paint was in there. Click thanks and Brainliest if it helped! Have an awesome day :D

7 0
3 years ago
Y=2x+5 and y=3x+2 using substitution strategy
WINSTONCH [101]

Answer:

Hi there the answer will be (3,11)

Since you are using the substitution way, you first plug in one of the y's into the other equation and you can see that they are set equal to each other.

2x+5=3x+2

Then you subtract 2x on both sides to get the x's on the same side

and you get 5=x+2

Then you subtract 2 on both sides, and you get x to equal to 3

then you plug x into any equation to get y to equal 11

y= 2(3)+5

5 0
3 years ago
Find the volume<br> 12 poir<br> 2.2 cm
Tanzania [10]
Answer: 26.4
To find the volume u multiply 12x2.2=26.4
6 0
3 years ago
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