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Fudgin [204]
2 years ago
5

You paint four walls. Each wall is a rectangle with a length of 20 feet and a height of 12 feet. One gallon of paint covers abou

t 320 square feet. How many gallons of paint do you need in order to cover the walls?
Mathematics
1 answer:
Naddik [55]2 years ago
5 0

Answer:

3 gallons

Step-by-step explanation:

Each wall 12 x 20 = 240 feet squared

4 walls =  4 x 240 = 960 squared feet

960 divided into 320 = 3

1 gallon --------320

1 gallon------------320

1 gallon-----------320

                    3 gallons----------960

 

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The number of calls coming per minute into a hotel reservation center is Poisson random variable with mean 3.
natima [27]

Answer:

a) 0.05

b) 0.9826

c) 0.000039308

Step-by-step explanation:

a) P_X(0) = \frac{e^{-3}3^0}{0!} = e^{-3} =  0.05

b) For two minutes, the mean is doubled, hence it is 6. In order to calculate the probability of al least two calls arriving, we calculate first the probability of the complementary event: At most 1 call will arrive. For that probability, we need to sum the probabilities of 0 and 1.

P_X(0) = e^{-6}

P_X(1) = \frac{e^{-6}*6^1}{1!} = 6*e^{-6}

Hence,

P(X \geq 2) = 1-P(X < 2) = 1- 7*e^{-6} = 0.9826

c) For five minutes the mean is 15. We need to sum the probabilities of 0, 1 and 2.

P_X(0) = e^{-15}

P_X(1) = e^{15}*15

P_X(2) = \frac{e^{-15}*15^2}{2!} = 112.5*e^{-15}

As a result,

P(X \leq 2) = e^{-15}(1+15+112.5) = 0.000039308

Practically 0

4 0
3 years ago
23 A circular fish pond has an area of 20m 2 Calculate the diameter of the fish pond.
Tju [1.3M]

Answer:

40 · sqrt(pi)/pi I believe

Step-by-step explanation:


7 0
3 years ago
Probability of 1 number when 100 numbers are available
Vilka [71]
It would be 1/100 or 1%
3 0
3 years ago
The african bush elephant weighs between 4.4 tons and 7.7 tons. What are its least and greatest wieghts rounded to the nearest t
WARRIOR [948]
4.4=4 tons rounded

7.7=8 tons rounded
6 0
3 years ago
Read 2 more answers
Only answer if you know for sure you’re right! :)
algol [13]

Answer:

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6 0
3 years ago
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