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2 years ago

8

Luisa buys a plane ticket that has an original price of $240. She uses a coupon code to get a 30% discount off of the original p

rice. She is then charged a 7% tax on the discounted price.
What is the final cost for Luisa's plane ticket?

2 answers:

laiz [17]2 years ago

6 0

Answer:

179.76$

Step-by-step explanation:

........

........

vladimir1956 [14]2 years ago

3 0

Answer:

$176.76

Step-by-step explanation:

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A radio station claims that the amount of advertising per hour of broadcast time has an average of 13 minutes and a standard dev

zimovet [89]

Answer:

$Z = 3.33$

Step-by-step explanation:

Z-score:

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question:

$\mu = 13, \sigma = 1.2$

You listen to the radio station for 1 hour, at a randomly selected time, and carefully observe that the amount of advertising time is equal to 17 minutes. Calculate the z-score for this amount of advertising time.

We have to find Z when X = 17. So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{17 - 13}{1.2}$

$Z = 3.33$

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2 years ago

8/2z=15/60 .solve proportion.

masya89 [10]

$\frac{8}{2z}=\frac{15}{60}\ \ \ \ \ |cross\ multiply\\\\2z\cdot15=8\cdot60\\\\30z=480\ \ \ \ |divide\ both\ sides\ by\ 30\\\\\boxed{z=16}$

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2 years ago

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What is your estimate for the number of airline flights in a year?

Firdavs [7]

The answer is between 45,000,000-65,000,000

8 0

3 years ago

One side of a triangle is two times the second side. The third side is 5 feet longer than the second side. The perimeter of a tr

Sphinxa [80]

Second side= x
First side = 2x
Third side = x+5
x+2x+x+5=49
4x=44
x=11

1st side= 22
2nd side = 11
3rd side = 16

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2 years ago

12 divided by 8/9 = ?

Oduvanchick [21]

The answer would be 13 1/2 because you turn the 12 into a fraction then change the division sign into a multiplication sign and find the reciprocal of 8/9 which is 9/8 you could now divide 12/1 divided by 9/8 you could cross simply then dove to get 27/2 and in the end you get 13 1/2 if you turn the improper fraction into a mixed number.

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3 years ago