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nikdorinn [45]
3 years ago
10

Select the correct answer.

Mathematics
1 answer:
Zarrin [17]3 years ago
6 0

Answer: the correct answer is 16.8°C.

Step-by-step explanation:

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If f(x)=2x to the second power what is f(x) when x=3
Bad White [126]
<h3> ♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

➷ Just substitute 3 in:

2(3)^2 = 18

It would be 18

<h3><u>✽</u></h3>

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

8 0
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
A rectangular garden has a total area of 48 sq yards. Draw and label two possible rectangular gardens with different side length
Pie
                                  6yd
8yd                                                                                              a =48sq yd                                                                                                    (6×8=48)


                                         4yd 
12yd                                                                                      a=48sq yd                                                                                               (4×12=48)
6 0
3 years ago
A quadrilateral has side lengths of 2x, (3x - 4), (2x - 3), and (x + 5). Find the<br> perimeter.
Shalnov [3]
Um i really do not know
7 0
3 years ago
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Scott reads 63 chapters of a book in 7 hours.<br> What is his rate in chapters per hour?
larisa86 [58]

Answer: Scott reads 9 chapters per hour.

Step-by-step explanation:

63/7 = 9

6 0
2 years ago
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