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Dvinal [7]
4 years ago
12

A family decides to rent a boat for the day. The boats rental rate is $500 for the first two hours and $50 for each additional h

alf hour. Suppose the family budgeted $700 to rent the boat. What is the maximum number of additional fall hours for which they can’t rent the boat.
Mathematics
2 answers:
bixtya [17]4 years ago
3 0

its====the question for the answer is 550

UkoKoshka [18]4 years ago
3 0

Answer:

4 is the maximum number of additional half-hours  for which the family can rent the boat.

Step-by-step explanation:

Let us represent with x the number of additional half hours the boat can be rented.

Then notice the cost of renting the boat is modeled with the following expression:

500+50x

Since it is the sum of the $500  for the first two hours plus the cost of the additional half hours which is the product of the cost of a single half hour $50 times the number of additional half-hours.

The family budgeted $700 therefore to cover the bill, therefore we have the following inequality:

500+50x\le700

We solve it for x:

500-500+50x\le700\\[0.2in]50x\le200\\[0.2in]\displaystyle x\le\frac{200}{50}\\[0.2in]x\le4

Therefore, the family can rent the boat for a maximum number of 4 additional half hours

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The amount of soft drink in a bottle is a Normal random variable. Suppose that in 7% of the bottles containing this soft drink t
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Answer:

The mean is 15.93 ounces and the standard deviation is 0.29 ounces.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

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.

7% of the bottles containing this soft drink there are less than 15.5 ounces

This means that when X = 15.5, Z has a pvalue of 0.07. So when X = 15.5, Z = -1.475.

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

-1.475 = \frac{15.5 - \mu}{\sigma}

15.5 - \mu = -1.475\sigma

\mu = 15.5 + 1.475\sigma

10% of them there are more than 16.3 ounces.

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1.28 = \frac{16.3 - \mu}{\sigma}

16.3 - \mu = 1.28\sigma

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From above

\mu = 15.5 + 1.475\sigma

So

15.5 + 1.475\sigma = 16.3 – 1.28\sigma

2.755\sigma = 0.8

\sigma = \frac{0.8}{2.755}

\sigma = 0.29

The mean is

\mu = 15.5 + 1.475\sigma = 15.5 + 1.475*0.29 = 15.93

The mean is 15.93 ounces and the standard deviation is 0.29 ounces.

6 0
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June : 30 days.

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October : 31 days.

November : 30 days.

December : 31 days.



Hope this helps!

7 0
4 years ago
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