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3 years ago

Math please help thanks only #4

Mathematics

1 answer:

Kisachek [45]3 years ago

4 0

Answer: Similar because they are the same shape and the angle BC is equal to angles DF :) hope this helped

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Suppose the average tread-life of a certain brand of tire is 42,000 miles and that this mileage follows the exponential probabil

Ahat [919]

Answer: The probability that a randomly selected tire will have a tread-life of less than 65,000 miles is 0.7872 .

Step-by-step explanation:

The cumulative distribution function for exponential distribution is :-

$P(X\leq x)=1-e^{\frac{-x}{\lambda}}$ , where $\lambda$ is the mean of the distribution.

As per given , we have

Average tread-life of a certain brand of tire : $\lambda=\text{42,000 miles }$

Now , the probability that a randomly selected tire will have a tread-life of less than 65,000 miles will be :

$P(X\leq 65000)=1-e^{\frac{-65000}{42000}}\\\\=1-e^{-1.54761}\\\\=1-0.212755853158\\\\=0.787244146842\approx0.7872$

Hence , the probability that a randomly selected tire will have a tread-life of less than 65,000 miles is 0.7872 .

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3 years ago

Y = - 0.27x ^ 2 + sqrt(5) * x + 1.34

kotegsom [21]

Answer: the answer is 0.32

Step-by-step explanation: first then

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3 years ago

The ratio of boys to girls on rowans swim team is 2:3.if there are 40 total swimmers on the team,how many of them are girls?

Bogdan [553]

Answer:

The ratio of girls is 24.

Step-by-step explanation:

If the total amount of swimmers is 40, you can divide it by 8 to get 5 multiples. If three of those 5's belong to the ratio of girls, the equation is 3 x 8. The answer is 24.

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3 years ago

what is 55 x 20. akjdhjhegrehgfrejhgtuketerkgtrehjtgehjrgtjerhgthejrgtjehtgjrhetgrehjtgrejhtgrehjtgjrehtgrjhtgrejhtgejhrtgrejhgt

11111nata11111 [884]

1,100 hope this helped

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3 years ago

Factored form of 16m^4-121

AnnZ [28]

$16m^4-121 =(4m^2-11)(4m^2+11)$

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3 years ago