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3 years ago

Help plezzzzzzzzz if u can

Mathematics

1 answer:

Zielflug [23.3K]3 years ago

3 0

u^2v^2w^-2

I MAY BE INCORRECT

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Help me please ASAP

vredina [299]

Answer:

the correct answer is c

Step-by-step explanation:

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3 years ago

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A certain type of automobile battery is known to last an average of 1140 days with a standard deviation of 80 days. If 400 of th

Sever21 [200]

Answer:

Mean = $\mu = 1140$

Standard deviation = $\sigma = 80$

Find the probabilities for the average length of life of the selected batteries.

A)The average is between 1128 and 1140.

We are supposed to fidn P(1128<x<1140)

Formula : $Z=\frac{x-\mu}{\sigma}$

At x = 1128

$Z=\frac{1128-1140}{80}$

$Z=-0.15$

Refer the z table for p value

P(x<1128)=0.4404

At x = 1140

$Z=\frac{1140-1140}{80}$

$Z=0$

Refer the z table for p value

P(x<1140)=0.5

So,P(1128<x<1140)=P(x<1140)-P(x<1128)=0.5-0.4404=0.0596

Hence the probabilities for the average length of life of the selected batteries is between 1128 and 1140 is 0.0596

B)The average is greater than 1152.

P(x>1152)

At x = 1128

$Z=\frac{1152-1140}{80}$

$Z=0.15$

Refer the z table for p value

P(x<1152)=0.5596

So,P(x>1152)=1-P(x<1152)=1-0.5596=0.4404

Hence the probabilities for the average length of life of the selected batteries is greater than 1152 is 0.4404

C) The average is less than 940.

P(x<940)

At x = 940

$Z=\frac{940-1140}{80}$

$Z=-2.5$

Refer the z table for p value

P(x<940)=0.5596

Hence the probabilities for the average length of life of the selected batteries is less than 940 is 0.5596

7 0

3 years ago

The incorrect work of a student to solve an equation 2(y + 6) = 4y is shown below: Step 1: 2(y + 6) = 4y Step 2: 2y + 8 = 4y Ste

zysi [14]

It should be 2 should be distrubed as 2y+12,y=6 theirs yr awser

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3 years ago

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A credit card company charges a 5% fee per transaction. If someone spends $40, what fee will the credit card company charge?

erma4kov [3.2K]

<h2> ║Δ║·°·Hello·°·║Δ║</h2>

Your answer should be:

Brainliest is appreciated!

{*+If this does not answer your question or displeases you please tell me in the comments below.+*}

Thank you have a wonderful day!

---Juri Davis

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4 0

3 years ago

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Jamarcus starts with $1,200 in a college savings account. His account earns interest at a rate of 1.8% compounded annually. How

nekit [7.7K]

Answer:

FV= $1,335.57

Step-by-step explanation:

Giving the following information:

Initial Investment (PV)= $1,200

Interest rate= 1.8% compounded annually

Number of periods= 6

<u>To calculate the future value, we need to use the following formula:</u>

FV= PV*(1+i)^n

FV= 1,200*(1.018^6)

FV= $1,335.57

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4 years ago