It will take 8 hours to fill the swimming pool. There is already 9,000 gallons filled, that leaves you with 12,000. 12,000 divided by the rate per hour 1,500. That gives you 8.

7 0

3 years ago

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Bruce is going to call one person from his contacts at random. He has 25 total contacts. 20 of those contacts are from his neigh

Naya [18.7K]

<h3>P(call a person not from his neighborhood) = $(\frac{1}{5} )$ </h3>

Step-by-step explanation:

Here, the total number of contacts in the list if Bruce = 25 contacts

The total number of neighbors in the contact = 20 people

Now, let E: Event of calling a person from his neighborhood

So, P(E) = $\frac{\textrm{Total Favorable Outcomes}}{\textrm{Total Outcomes}} = \frac{20}{25} = (\frac{4}{5})$

So, the probability of calling a person from his neighborhood is $(\frac{4}{5} )$

⇒P(E) = $(\frac{4}{5} )$

Now,as we know: P(E) + P(not E) = 1

So, the probability of NOT calling a person from neighborhood

= 1 - probability of calling a person from his neighborhood

$= 1 - (\frac{4}{5}) = \frac{5-4}{5} = (\frac{1}{5})$

⇒P( not E) = $(\frac{1}{5} )$

Hence, P(call a person not from his neighborhood) = $(\frac{1}{5} )$

5 0

3 years ago

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Question ❓:-<br>4^(x+2)+2^(2x+1)-36=0,x=?

sergiy2304 [10]

Answer:

x = 1/2

Step-by-step explanation:

$4^{x+2}+2^{2x+1}-36=0$
$16*4^x+2*2^{2x}-36=0$
$16*4^x+2*4^x-36=0$
$18*4^x = 36\\\\$
$4^x=2\\\\$
$2^{2x}=2^1\\$
$2x=1\\$
$x = 1/2$

8 0

3 years ago

Help for number 12 pls

Marianna [84]

10 minutes left of homework

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3 years ago

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Why is coal a non-renewable energy source​

Why is coal a non-renewable energy source