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uysha [10]
3 years ago
13

Parker's family took a road trip to Niagrara Falls. Parker fell asleep after they had travelled 198 miles. If the total length o

f the trip was 440 miles, what percentage of the total trip had they travelled when Parker fell asleep?
Mathematics
2 answers:
gregori [183]3 years ago
6 0

Answer:

242

Step-by-step explanation:

because i need trust in my life

kumpel [21]3 years ago
6 0

Answer:

45%

Step-by-step explanation:

this time trust me everyone here

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Find the surface area of the prism.
Maurinko [17]

Answer:

326m²

Step-by-step explanation:

Find the area of each side and find the total sum from each individual area:

2(15*4)+2(7*4)+2(7*15)=2(60)+2(28)+2(105)=2(163)=326

So the surface area of the prism is 326m²

5 0
3 years ago
_____ is the current illustration used to show us how to eat a healthy diet. Basic Four Basic Four My Plate My Plate Food Pyrami
Serhud [2]

Answer:

My Plate.

<em>My Plate</em> is the current illustration used to show us how to eat a healthy diet.

  • Here is the My Plate diagram.

<em>I hope this helped at all.</em>

5 0
3 years ago
(40-3x7-9-6x2]+ 4+19<br> I need the answer to this
Schach [20]

-3x7=-21

6x2= -12

40+21-9+12

61-21

40+4+19

44+19= 63

5 0
3 years ago
I have the formula <br><br> A fraction • π r^2
MatroZZZ [7]

Answer:

22.2 ft²

Step-by-step explanation:

The area (A) of a sector is calculated as

A = area of circle × fraction of circle

  = πr² × \frac{50}{360}

  = π × 7.13² × \frac{5}{36}

  = \frac{7.13^2(5)\pi }{36} ≈ 22.2 ft² ( nearest tenth )

4 0
3 years ago
A fast food restaurant executive wishes to know how many fast food meals adults eat each week. They want to construct a 98% conf
adelina 88 [10]

Answer:

n=(\frac{2.326(1.1)}{0.07})^2 =1336.006 \approx 1337

So the answer for this case would be n=1337 rounded up to the nearest integer

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X represent the sample mean for the sample  

\mu population mean (variable of interest)

\sigma=1.1 represent the population standard deviation

n represent the sample size  

Solution to the problem

The margin of error is given by this formula:

ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}    (a)

And on this case we have that ME =0.07 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

n=(\frac{z_{\alpha/2} \sigma}{ME})^2   (b)

The critical value for 98% of confidence interval now can be founded using the normal distribution. And in excel we can use this formula to find it:"=-NORM.INV(0.01;0;1)", and we got z_{\alpha/2}=2.326, replacing into formula (b) we got:

n=(\frac{2.326(1.1)}{0.07})^2 =1336.006 \approx 1337

So the answer for this case would be n=1337 rounded up to the nearest integer

3 0
3 years ago
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