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Luda [366]
3 years ago
12

Lucy purchased a prepaid phone card for $30. Long distance calls cost 21 cents a minute using this card. Lucy used her card only

once to make a long distance call. If the remaining credit on her card is $27.27, how many minutes did her call last?
Mathematics
1 answer:
Alisiya [41]3 years ago
8 0

Answer:

129.8 mins

Step-by-step explanation:

27.27/21 = 129.8

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according the the american hotel and motel association, women are expected to account for half of all business travelers by the
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Answer:  0.71221

Step-by-step explanation:

We know that for binomial distribution :-

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Given : p=0.80  ;   n=20

Then, \mu=20(0.8)=16\ \ ;\ \sigma=\sqrt{20(0.8)(0.2)}=1.79

Let X be the binomial variable.

z-score : z=\dfrac{x-\mu}{\sigma}

For x=9

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For x=17

z=\dfrac{17-16}{1.79}=0.56

Then, the probability that more than 9 but less than 17 of the hotels in the sample is given by :-

P(9

Hence, the probability that more than 9 but less than 17 of the hotels in the sample = 0.71221

5 0
3 years ago
Jason helped his dad put plastic and aluminum items into the recycling container. The container is a large cube with a length, w
igor_vitrenko [27]

Answer:

its 216 cubic feet.

Step-by-step explanation:

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3 years ago
I really need help...
lianna [129]
It could not be 73º because if you add that to 120 then it will be more than 180 degrees, which is the total number of degrees in a triangle. Hope this helps!
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2 years ago
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The base of a bicycle ramp has an area of 4 square feet. The ramp is a triangular prism. If the ramp has a height of 2 1/2 feet,
Anastaziya [24]

Answer:


Step-by-step explanation:

In general:

Volume = (the area of the base of the figure) times (the figure's height)

Here, the area of the base is 4 square feet, the height is 2 1/2 foot = 5/2 foot

Our Volume is then:

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3 years ago
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Alenkinab [10]

Answer:

A

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Remark

f and d are equal (and acute) because they are corresponding angles.

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f + 82 = 180

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2 years ago
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