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Scilla [17]
3 years ago
11

Mini muffins cost $3 per dozen

Mathematics
1 answer:
snow_tiger [21]3 years ago
3 0

Answer:

agree with both because 1 dollar = 4 muffins so 2 x 4 = 8 muffins and 4x4 = 16 muffins

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Most dermatologists recommend using sunscreens that have a Sun Protection Factor (SPF) of at least 30. One of the authors wanted
Basile [38]

Answer:  We are 95% confident that the mean SPF level of sunscreen used by all Cal Poly students is between 29.0813 and 40.0187.

Step-by-step explanation:

Given : Significance level : \alpha: 1-0.95=0.05

Sample size : n= 52 , which is a large sample (n>30), so we use z-test.

By using z-value table,

Critical value: z_{\alpha/2}=1.96

Sample mean : \overline{x}= 34.55

Standard deviation : \sigma= 20.12

The confidence interval for population means is given by :-

\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}

i.e. 34.55\pm(1.96)\dfrac{ 20.12}{\sqrt{52}}

=34.55\pm5.46867829455\\\\\approx34.55\pm5.4687\\\\=(34.55-5.4687, 34.55+5.4687)=(29.0813,\ 40.0187)

Now, the 95% confidence interval for the ppopulation mean = . (29.0813, 40.0187)

Hence, We are 95% confident that the mean SPF level of sunscreen used by all Cal Poly students is between 29.0813 and 40.0187.

7 0
3 years ago
A school has 1500 students. Given that 3% of them were late for school on a particular day, find the no of students who were pun
Setler [38]

Answer:

1455

Step-by-step explanation:

0.03% x 1500 = 45

therefore, 45 students were late

1500 - 45 = 1455 punctual

3 0
2 years ago
Can someone answer this really fast?
Vikki [24]

Answer:

Use your brain

Step-by-step explanation:

Because

6 0
3 years ago
Read 2 more answers
Please help me due today i beg of u
podryga [215]

Answer:

1) D. (2, -6)

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Step-by-step explanation:

idk how to explain just trust me

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3 years ago
Identify this pair of angles ​
REY [17]
They are opposite exterior angles
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2 years ago
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