13 POINTSS!! PLZ HELPP!! I WILL GIVE BRAINIEST

Mathematics

2 answers:

MakcuM [25]3 years ago

7 0

The correct answer is 84 square meters. You need to find the volume, so let's find the formula. V = l x w x h. 6 x 7 = 42 x 2 = 84

Angelina_Jolie [31]3 years ago

3 0

Parallelogram area formula: bh

6*7=42

The area of the parallelogram is 42square meters

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"the life length x (in years) of a dvd player" is exponentially distributed with mean 5 years. what is the probability that a mo

loris [4]

The exponential distribution is:
$\lambda e^{- \lambda x}$
where $\lambda = \frac{1}{mean}=\frac{1}{5}$

The probability we want is how likely will a dvd player last more than 8 years, given it has already lasted 5 years
To find this, you use conditional probability.
$P(A|B) = \frac{P(A and B)}{P(B)}$
where A is P(x>8) and B is P(x>5)
To find these probabilities, integrate over the distribution:
$P(x \ \textgreater \ N) = \int_N^{\infty} \frac{1}{5} e^{-x/5} dx = e^{-N/5}$

Sub into conditional probability formula:

$P(x \ \textgreater \ 8 | x\ \textgreater \ 5) = \frac{P(x\ \textgreater \ 8)}{P(x\ \textgreater \ 5)} = \frac{e^{-8/5}}{e^{-5/5}} = e^{-3/5} = 0.549$

Final Answer: Given a dvd player is more than 5 years old, the probability that it will last another 3 more years is about 54.9%

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2 years ago

How would pamela’s picture change if 12 students chose grape juice as their favorite?

dezoksy [38]

So the answer to very good question is YES

5 0

2 years ago

Find the area of the shaded region round to the nearest tenth

Alenkinab [10]

Answer: 818.4

Step-by-step explanation:

Using the area of a sector formula, we get the area of the entire sector is $(\pi)(27.8^{2})\left(\frac{150}{360} \right)$ .