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3 years ago

I NEED HELPIM NO GOOD AT RATESI CANT GO ONE TILL THIS IS ANSWER

Mathematics

2 answers:

Murrr4er [49]3 years ago

8 0

Answer : The correct option is, (A) 7 hours 42 minutes

Explanation :

Average speed : It is defined as the ratio total distance to total time.

Formula used :

$\text{Average speed}=\frac{\text{Total distance}}{\text{Total time}}$

As per question,

Total distance traveled = 492.8 mile

Average speed = 64 mile/hour

Now put all the given values in the above formula, we get:

$\text{Average speed}=\frac{\text{Total distance}}{\text{Total time}}$

$64mile/hour=\frac{492.8mile}{\text{Total time}}$

$\text{Total time}=\frac{492.8mile}{64mile/hour}$

$\text{Total time}=7.7hour$

As we know that, 1 hour has 60 minutes.

7.7 hours

= 7 hr + 0.7 hr

= 7 hr + 0.7 × 60 min

= 7 hr + 42 min

$\text{Total time}=7\text{ hour }42\text{ minute}$

Therefore, the the take them to reach their destination will be, 7 hours 42 minutes.

goblinko [34]3 years ago

6 0

Answer:

I believe its d bc if you divide the distance by speed you get that

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Jobisdone [24]

Answer:

$5,200 a fixed manufacturing overhead cost is included in the company's inventory at the end of last year.

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3 years ago

Can you please help me

FromTheMoon [43]

Answer:

Step-by-step explanation:

most accurate answer if tax was added it would be about 10 added to the fee when u do the math so the answer is 9

7 0

2 years ago

Read 2 more answers

The head of maintenance at XYZ Rent-A-Car believes that the mean number of miles between services is 3639 3639 miles, with a var

Andrei [34K]

Answer:

96.6% probability that the mean of a sample would differ from the population mean by less than 126 miles

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

A reminder is that the standard deviation is the square root of the variance.

Normal probability distribution

When the distribution is normal, we use 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.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this question:

$\mu = 3639, \sigma = \sqrt{145161} = 381, n = 41, s = \frac{381}{\sqrt{41}} = 59.5$

Probability that the mean of the sample would differ from the population mean by less than 126 miles

This is the pvalue of Z when X = 3639 + 126 = 3765 subtracted by the pvalue of Z when X = 3639 - 126 = 3513. So

X = 3765

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

By the Central Limit Theorem

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

$Z = \frac{3765 - 3639}{59.5}$

$Z = 2.12$

$Z = 2.12$ has a pvalue of 0.983

X = 3513

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

$Z = \frac{3513 - 3639}{59.5}$

$Z = -2.12$

$Z = -2.12$ has a pvalue of 0.017

0.983 - 0.017 = 0.966

96.6% probability that the mean of a sample would differ from the population mean by less than 126 miles

3 0

3 years ago

A patient was supposed to take 560 mg of medicine but only tool 420 mg.What percent of the medicine did the patient take?

Stolb23 [73]

75% I think.

because if you do 560 - 420 you get 140.

140 / 560 x 100 = 25

which means there is a 25% decrease, so they took 75%.

7 0

3 years ago

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andrew-mc [135]

1. square base area= 25 inches

2. using the slanted 6.5
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4. when u find what b is... that's the height of one of the triangle
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height=b (refer to step 3)

5. then work out the area of 1 triangle using that...
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7. Then add together the square based area in step 1..(25)
to the 4 triangular, area faces (i.e from step 6) - the total will be ur answer for the amount of cardboard!!

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3 years ago