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3 years ago

12

Suppose a building has 10 floors. m people get into the elevator at level 0 and each one independently and uniformly at random c

hooses a floor between 1 and 10. what is the expected number of stops of the elevator?

1 answer:

Tom [10]3 years ago

8 0

It's 1 stops per person the expected stop is 10
I hope this helps

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Hey here is my question. So if you have 20 legos and your sister has 10 legos how many more legos do you have than her? fr.ee po

just olya [345]

Answer:

I guess the best answer is 10

Step-by-step explanation:

because 20-10 is 10

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3 years ago

Read 2 more answers

Create a proportional ratio to the given ratio:<br> 2/4 is equal to what?

sladkih [1.3K]

Answer:

4/8, 6/12, 7/14,etc.

Step-by-step explanation:

Multiply 2/4 by any number(like 4) and you can find a equal ratio

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3 years ago

Mohamed and Li Jing were asked to find an explicit formula for the sequence -5, -25, -125, -625,....

Nuetrik [128]

Answer:

Li Jing's formula i.e. $\boxed{g_n=-5\cdot \:5^{n-1}}$ is right.

Step-by-step explanation:

Considering the sequence

$-5,\:-25,\:-125,\:-625,...$

A geometric sequence has a constant ratio r and is defined by

$g_n=g_0\cdot r^{n-1}$

$\mathrm{Compute\:the\:ratios\:of\:all\:the\:adjacent\:terms}:\quad \:r=\frac{g_{n+1}}{g_n}$

$\frac{-25}{-5}=5,\:\quad \frac{-125}{-25}=5,\:\quad \frac{-625}{-125}=5$

$\mathrm{The\:ratio\:of\:all\:the\:adjacent\:terms\:is\:the\:same\:and\:equal\:to}$

$r=5$

So, the sequence is geometric.

as

$\mathrm{The\:first\:element\:of\:the\:sequence\:is}$

$g_1=-5$

$r=5$

so

$g_n=g_1\cdot r^{n-1}$

$\mathrm{Therefore,\:the\:}n\mathrm{th\:term\:is\:computed\:by}\:$

$g_n=-5\cdot \:5^{n-1}$

Therefore, Li Jing's formula i.e. $\boxed{g_n=-5\cdot \:5^{n-1}}$ is right.

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3 years ago

The product of which expression contains four decimal places?

Naya [18.7K]

Answer:

D.) 14.2*0.784

Step-by-step explanation:when you calculate it, there is 4 numbers behind the decimal point.

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3 years ago

PLLLLLLSSSSSs helpppppppp

Citrus2011 [14]

Answer:

x = 40

y = 62

Step-by-step explanation:

I figured out the answer by finding the x on the left triangle first by writing an equation:

(3x - 18) + (x + 7) + (x - 9) = 180

once I worked that I plugged in the number which was 40.

Then for the triangle to the right I also plugged in the numbers for x and got 118 degrees I took 180 and subtracted 118 to get my answer of 62 for y.

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3 years ago