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3 years ago

2+4•5+1=26 Where do I put the parentheses to make the equation true

Mathematics

1 answer:

rosijanka [135]3 years ago

4 0

2 + ( 4 • 5 ) + 1 = 26 like this

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Let X be the waiting time for a car to pass by on a country road, where X has an average value of 35 minutes. If the random vari

Gelneren [198K]

Answer:

Probability that the wait time is greater than 37 minutes is 0.3474.

Step-by-step explanation:

We are given that the random variable X is known to be exponentially distributed and X be the waiting time for a car to pass by on a country road, where X has an average value of 35 minutes.

Let X = waiting time for a car to pass by on a country road

The probability distribution function of exponential distribution is given by;

$f(x) = \lambda e^{-\lambda x} , x >0$ where, $\lambda$ = parameter of distribution.

Now, the mean of exponential distribution is = $\frac{1}{\lambda}$ which is given to us as 35 minutes that means $\lambda = \frac{1}{35}$ .

So, X ~ Exp( $\lambda = \frac{1}{35}$ )

Also, we know that Cumulative distribution function (CDF) of Exponential distribution is given as;

$F(x) = P(X \leq x) = 1 - e^{-\lambda x}$ , x > 0

Now, Probability that the wait time is greater than 37 minutes is given by = P(X > 37 min) = 1 - P(X $\leq$ 37 min)

P(X $\leq$ 37 min) = $1 - e^{-\frac{1}{35} \times 37}$ {Using CDF}

= 1 - 0.3474 = 0.6525

So, P(X > 37 min) = 1 - 0.6525 = 0.3474

Therefore, probability that the wait time is greater than 37 minutes is 0.3474.

4 0

3 years ago

Levis wants to buy cookies for his friends. The diameter of the cookie is 7 cm. What is the cookie's area?

arlik [135]

Answer:

180

Step-by-step explanation:

IF you

4 0

3 years ago

Read 2 more answers

Which is the asymptote of the graph

julia-pushkina [17]

It's B

iahsis jzjansnzk

7 0

3 years ago

Rewrite using a single exponent. 53.53

Helga [31]

Answer:

${5}^{6} \: \: or \: \: {25}^{3} = 15625$

Step-by-step explanation:

${5}^{3} \times {5}^{3}$

Here we can solve this in 2 ways ,

Method 1 :

${5}^{3} \times {5}^{3}$

Here the bases are equal. So,

$= > {5}^{3 + 3} = {5}^{6} = 15625$

Method 2 :

${5}^{3} \times {5}^{3}$

Here the exponents are same. So,

$= > {(5 \times 5)}^{3} = {25}^{3} = 15625$

4 0

3 years ago

Three more than a number is sixty. (Write the equation

Paha777 [63]

Answer:

x + 3 = 60

Step-by-step explanation:

Let the number be x

x + 3 = 60

Hope it helps :)

Please mark my answer as the brainliest

7 0

3 years ago