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madreJ [45]
3 years ago
8

Wasting my last points on this please help me out guys

Mathematics
1 answer:
OverLord2011 [107]3 years ago
8 0

Answer:

Cindy has 12 donuts plus her brothers amount while Jamie has more than both of their donuts having an exact amount of 42 donuts

Step-by-step explanation:

Hope this helps

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I’m not sure how to answer this pls help <br><br> 6.1 x 1.9 + 3.7
timofeeve [1]

The answer is 15.39.
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3 years ago
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Find the circumference or distance around a circus ring (circle) with a diameter of 100 feel. Use 3.14 for pi
Brums [2.3K]

Use Formula C= pi(d) so that would be 3.14 x 100 = 314

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3 years ago
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In a study to establish the absolute threshold of hearing, 80 male college freshmen were each seated in a soundproof room and a
Norma-Jean [14]

Answer:

Step-by-step explanation:

Hello!

To study the threshold of hering the researcher took a random sample of 80 male college freshmen.

The students underwent an audiometry test where a tome was played and they had to press a button when they detected it.  The researcher recorded the lowest stimulus level at which the tone was detected obtaining a sample mean of X[bar]= 22.2 dB and a standard deviation of S= 2.1 dB

To estimate the population mean, since we don't have information about the variable distribution but the sample size is greater than 30, you can use the approximation of the standard normal distribution:

X[bar] ± Z_{1-\alpha /2} * \frac{S}{\sqrt{n} }

Where the semiamplitude or margin of error of the interval is:

d= Z_{1-\alpha /2} * \frac{S}{\sqrt{n} }

Using a 95% level Z_{0.975}= 1.965

d= 1.965 * \frac{2.1}{\sqrt{80} }

d= 0.46

The point estimate of the population mean of the threshold of hearing for male college freshmen is X[bar]= 22.2 db

And the estimation using a 95%CI is [21.74;22.66]

I hope this helps!

8 0
3 years ago
Whats the reciprocal of 5.87*10^4
Alexxandr [17]
58700 because if you follow the rules of PEMDAS then you would have to exponents 10^4 is 10000 then multiply 5.87 which gives 58700
4 0
3 years ago
HELP PLEASE !! .................................................................................................................
myrzilka [38]

Answer:

15

Step-by-step explanation:

Substitute a and b then

Follow PEMDAS

Hope this helps! :)

5 0
3 years ago
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