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3 years ago

PLEASE HELP, 25 POINTS!!!!!

Mathematics

1 answer:

AveGali [126]3 years ago

4 0

Answer:

-14

cuz sqrt of -16 is -4 and sqrt of -64 is -8 but there is an - sign there so it is positive

then 3+-4 is -1 and 6+8 is 14

lastly multiply and you get negative 14

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Find the real solutions of e^3t=100

wel

E^3t=100

ln100=3t

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3 years ago

Factor.<br> 28 - 4u<br> I don’t know how to factor 28-4u so if anyone can help thank you

Sedaia [141]

Answer: 4(7-u)

Step-by-step explanation:

In order to factor, you have to find the GCF (Greatest Common Factor)

28:1, 28, 2, 14, 4, 7

4:1, 4, 2

The greatest common factor here is 4.

You can factor out 4 from this equation, therefore making it 4(7-u)

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2 years ago

The cost of admission to a history museum is $3.25 per person over the age of 3 kids 3 and under

telo118 [61]

Answer:

Step-by-step explanation:

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3 years ago

Read 2 more answers

Deshaun started baking at 9:25 AM and finished at 10:41 AM How long did it take him? Give your answer in hours and minutes

Zepler [3.9K]

Answer:

1 hour and 16 minutes

Step-by-step explanation:

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7 0

2 years ago

The caller times at a customer service center has an exponential distribution with an average of 22 seconds. Find the probabilit

jenyasd209 [6]

Answer:

The probability that a randomly selected call time will be less than 30 seconds is 0.7443.

Step-by-step explanation:

We are given that the caller times at a customer service center has an exponential distribution with an average of 22 seconds.

Let X = caller times at a customer service center

The probability distribution (pdf) of the exponential distribution is given by;

$f(x) = \lambda e^{-\lambda x} ; x > 0$

Here, $\lambda$ = exponential parameter

Now, the mean of the exponential distribution is given by;

Mean = $\frac{1}{\lambda}$

So, $22=\frac{1}{\lambda}$ ⇒ $\lambda=\frac{1}{22}$

SO, X ~ Exp( $\lambda=\frac{1}{22}$ )

To find the given probability we will use cumulative distribution function (cdf) of the exponential distribution, i.e;

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

Now, the probability that a randomly selected call time will be less than 30 seconds is given by = P(X < 30 seconds)

P(X < 30) = $1 - e^{-\frac{1}{22} \times 30}$

= 1 - 0.2557

= 0.7443

7 0

3 years ago