3 years ago

PLS HELP MY GRADE DEPENDS ON IT Image is attached below

Mathematics

1 answer:

Lyrx [107]3 years ago

8 0

Answer: the first one

Step-by-step explanation: head math

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X to the second power = 500 <br><br> what values can be used SQUARE ROOTS ONLY PLEASEEE!!!!!

Dahasolnce [82]

500
because when you power to the second power a square root, it cancels and the answer is the number you originally had

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3 years ago

According to police sources, a car with a certain protection system will be recovered 87% of the time. Find the probability that

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Answer: 0.01145

Step-by-step explanation:

We use Binomial distribution , where the probability of getting x successes in n trial is given by :-

$P(x)=^nC_xp^x(1-p)^{n-x}$ , p = probability of getting each success in each trial.

As per given

The proportion that a car with a certain protection system will be recovered= p=0.87

n= 8

Let x be the number of cars will be recovered.

Then, the probability that 4 of 8 stolen cars will be recovered:

$P(X=4)=^8C_4(0.87)^4(1-0.87)^{8-4}$

$=\dfrac{8!}{4!(8-4)!}(0.87)^4(0.13)^4\\\\= 70(0.57289761)(0.00028561)\\\\=0.0114537700474\approx0.01145$

Hence, the required probability is 0.01145.

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3 years ago

Justin has $500 in a savings account at the beginning of the summer. He wants to have at least $300 in the account by the end of

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Step-by-step explanation:

1 because 20 times 10 is 200 and if he starts with 500 then he can withdraw 20 dollars a week for 10 weeks to have 300 left by the end of the summer, hope this helps :)

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