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Alinara [238K]
3 years ago
11

The waiting time at an elevator is uniformly distributed between 30 and 200 seconds. what is the probability a rider must wait m

ore than 1.5 minutes?
Mathematics
1 answer:
stira [4]3 years ago
5 0
1.5 minutes = 90 second

The probability density function is

f_X(x)=\begin{cases}\dfrac1{200-30}=\dfrac1{170}&\text{for }30\le x\le200\\\\0&\text{otherwise}\end{cases}

so the probability of interest is

\mathbb P(X>90)=\displaystyle\int_{90}^\infty f_X(x)\,\mathrm dx
\mathbb P(X>90)=\dfrac1{170}\displaystyle\int_{90}^{200}\mathrm dx
\mathbb P(X>90)=\dfrac{200-90}{170}=\dfrac{11}{17}\approx0.6471
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4x+(-3)=-2x-5 could someone help me solve this?
lions [1.4K]

4x+(-3)=-2x-5

4x-3 = -2x-5

add 2x to each side

6x-3 =-5

add 3 to each side

6x = -2

divide by 6

x = -2/6

divide top and bottom by 2

x = -1/3

5 0
3 years ago
A company orders 25 boxed lunches from a deli for $185. If each boxed lunch costs the same amount, what is the unit cost of each
guapka [62]

Answer:

7.40

Step-by-step explanation:

Divide 185 by 25 to get unit rate

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3 years ago
Find the 12th term of the geometric sequence 5, –25, 125, ...<br> HELP ASAP WILL NAME BRAINLEST
kodGreya [7K]

Step-by-step explanation:

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3 0
2 years ago
Someone pls answer this it’s so confusing lol
GenaCL600 [577]

Answer:

<h2>y = \frac{w}{h -  {2c}^{3} }</h2>

Step-by-step explanation:

w = yh - 2yc³

First of all factorize y out of the expression on the right side of the equation

That's

w = y( h - 2c³)

Next divide both sides by (h - 2c³) to make y stand alone

We have

<h3>\frac{y(h -  {2c}^{3}) }{h -  {2c}^{3} }  =  \frac{w}{h -  {2c}^{3} }</h3>

We have the final answer as

<h3>y = \frac{w}{h -  {2c}^{3} }</h3>

Hope this helps you

4 0
3 years ago
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Answer:

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You do this because you are splitting the 250 sheep into 40 acres.

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There cannot be .25 of a sheep, and since it says on average the answer does not need to be exact. So you would round it off to 6 as your answer.

4 0
2 years ago
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