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V125BC [204]
3 years ago
8

A costumer placed an order with a bakery for muffins.The Baker has completed 37.5% of the order after baking 81 muffins. How man

y muffins did the costumer order?
Mathematics
2 answers:
Elza [17]3 years ago
5 0
216 ? Maybe . I think you have to multiply 81 times .375 you move the decimal two places over . I believe that’s how you do the problem
Elena-2011 [213]3 years ago
3 0
37.5% = 0.375

81 / 0.375 = 216

The customer ordered 216 muffins.
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The time, t, required to complete a job
tigry1 [53]

Answer:

19 hrs

Step-by-step explanation:

t varies inversely with number of people p

t = k/p

If it takes 7.125 hrs for 8 workers to do the job

K = tp

= 7. 125 x 8

= 57

How many hours will it take if there are 3 workers .

Recall t = k/p

t = 57/3

= 19 hrs

Therefore, It’ll take 19 hrs to Complete the job if there are only three workers.

3 0
3 years ago
In a survey of adults aged 57 through 85​ years, it was found that 86.6​% of them used at least one prescription medication. Com
OleMash [197]

Answer:

a) 272 used at least one prescription​ medication.

b) The 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication is (85.6%, 87.6%).

Step-by-step explanation:

Question a:

86.6% out of 3149, so:

0.866*3149 = 2727.

272 used at least one prescription​ medication.

Question b:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the z-score that has a p-value of 1 - \frac{\alpha}{2}.

For this problem, we have that:

n = 3149, \pi = 0.866

90% confidence level

So \alpha = 0.1, z is the value of Z that has a p-value of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.  

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.866 - 1.645\sqrt{\frac{0.866*0.134}{3149}} = 0.856

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.866 + 1.645\sqrt{\frac{0.866*0.134}{3149}} = 0.876

For the percentage:

0.856*100% = 85.6%

0.876*100% = 87.6%.

The 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication is (85.6%, 87.6%).

7 0
3 years ago
Find the slope of the line that passes through the points (20,8) and (9,16)
Iteru [2.4K]

Answer:

slope: -\frac{8}{11}

slope-intercept form: y= -\frac{8}{11}x+\frac{248}{11}

Step-by-step explanation:

Hope this helps!

6 0
2 years ago
2/3 times 15 and explained​
IgorC [24]

Answer:

10

Step-by-step explanation:

2/3 * 15/1 = 30/3 = 10

8 0
3 years ago
Need help please as soon as possible
astraxan [27]

Answer:

answer is either c or b. I am not sure though

Step-by-step explanation:


4 0
2 years ago
Read 2 more answers
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