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3 years ago

What is the length of BC? ___units?

Mathematics

1 answer:

san4es73 [151]3 years ago

7 0

Supposing AC and AB are the same length we can solve this by equating these two expressions to each other;

2x - 24= x -2

x=22

Since the missing side BC equals "x" then BC = 22

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Let X = the time between two successive arrivals at the drive-up window of a local bank. If X has an exponential distribution wi

LuckyWell [14K]

Answer:

a) E(X)=1

b) σ=1

c) P(X>1)=0.368

d) P(2<X<5)=0.128

Step-by-step explanation:

We have X: "the time between two successive arrivals at the drive-up window of a local bank", exponentially distributed with λ = 1.

a) We have to compute the expected time between two successive arrivals.

The expected value for X as it is exponentially distributed is:

$E(X)=\dfrac{1}{\lambda}=\dfrac{1}{1}=1$

b) We have to compute the standard deviation of X.

The standard deviation is calculated as:

$\sigma=\dfrac{1}{\lambda}=\dfrac{1}{1}=1$

c) The probability that X is larger than 1 (P(X>1))

We can express the probability as:

$P(X>t)=e^{-\lambda t}\\\\P(X>1)=e^{-\lambda\cdot 1}=e^{-1}=0.368$

d) The probability that X is between 2 and 5 (P(2<X<5))

$P(X>t)=e^{-\lambda t}\\\\\\P(25)\\\\P(2$

4 0

3 years ago

42 add 1 than multiply by 4

AleksandrR [38]

Answer:

172

Step-by-step explanation:

42+1= 43

43 x 4= 172

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Sometimes should be the answer

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Answer:

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Answer:

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Step-by-step explanation:

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