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valentinak56 [21]
3 years ago
8

Jose rented a truck for one day. There was a bose fee of $19.95, and there was an additional charge of 84 cents for each mile dr

iven. Jose had to pay $220.71 when he returned the truck. For how many miles did he drive the truck?​
Mathematics
1 answer:
nevsk [136]3 years ago
5 0

Answer:

Step-by-step explanation:

Let the number of miles = x

C ost = Base + 0.84x

Cost = 220.71 dollars

Base = 19.95

220.71 = 19.95 + 0.84x                    Subtract 19.95 from both sides

220,71 - 19.95 = 0.84 x                    Combine

200.76 = 0.84x                                Divide by 0,84

200.76/0.84 = x

x = 239 miles.

Remark: The trick to this question is to make sure that total Cost, the Base amount, and cost / mile are all in dollars. Don't mix and match.

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BartSMP [9]

Answer:

Step-by-step explanation:

7e^x=343

/7        /7

e^x=49

By trial and error, x must be between 3 and 4, but closer to 4.

Further trial and error says x must be between 3.8 and 3.9, but closer to 3.9

Another trial and error says x must be between 3.89 and 3.9.

The closest answer I got was 3.891821

4 0
3 years ago
Engineers want to design seats in commercial aircraft so that they are wide enough to fit ​99% of all males.​ (Accommodating 100
Nezavi [6.7K]

Answer:

p99 = 16.4 inches

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

Men have hip breadths that are normally distributed with a mean of 14.3 in. And a standard deviation of 0.9 in.

This means that \mu = 14.3, \sigma = 0.9

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This is the value of X when Z has a p-value of 0.99, so X when Z = 2.327. Then

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

2.327 = \frac{X - 14.3}{0.9}

X - 14.3 = 0.9*2.327

X = 16.4

So

p99 = 16.4 inches

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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