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Thepotemich [5.8K]
3 years ago
13

What is the expression of x to the 2 -16 equivalent to

Mathematics
2 answers:
Katarina [22]3 years ago
7 0
The simplest answer, in terms of powers of 2, is 

                                             1
                                      ---------------
                                             16
                                           2
                             4                                     16
Please note that 2     equals 16, and that 2       thus equals 16^4.

Thus, another form in which the answer can be expressed is 

          1                  1
------------- , or ----------- .    If you want to take this further, calculate
        4                      2
   16                  256



           1
--------------------
   (256)(256)
Tpy6a [65]3 years ago
3 0
If you mean (x^2 -16), then x^2-16 = (x+4)*(x-4). This follows from the formula a^2 - -b^2=(a+b)*(a-b)
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When 2251 voters were polled, 52% said they were voting yes on an initiative measure. find the margin of error and an interval t
expeople1 [14]
The margin of error for a sample proportion is given by
z_{\alpha/2}\sqrt{ \frac{p(1-p)}{n} }
where: z_{\alpha/2} is the z score associated with the confidence level, p is the sample prortion and n is the sample size.
We assume a confidence level of 95%, then z_{\alpha/2}=1.96
p = 52% = 0.52 and n = 2251

Therefore, margin of error =
 z_{\alpha/2}\sqrt{ \frac{p(1-p)}{n} }= 1.96\times \sqrt{ \frac{0.52(1-0.52)}{2251} }  \\ = 1.96\times \sqrt{ \frac{0.52(0.48)}{2251} } = 1.96\times \sqrt{ \frac{0.2496}{2251} } \\  = 1.96\times \sqrt{0.000110884} =1.96\times 0.0105 \\ =0.0206=2.1\%

The the interval that is likely to contain the true population proportion is between 49.9% and 54.1%.
5 0
3 years ago
The regular price of a baseball hat is 14.45$. If Carlos buys the baseball hat on sale for 20% off the regular price, how much c
otez555 [7]

Answer:

$8.44

Step-by-step explanation:

To find the 20%

x/14.45=20/100

14.45×20=289

289÷100=2.89

We then subtract 2.89 from 14.45 to get the selling price.

14.45-2.89=11.56

$11.56 is the price of the baseball hat on sale.

To get the change

20-11.56=8.44

$8.44 is the change

<u><em>I</em><em> </em><em>hope</em><em> </em><em>this</em><em> </em><em>helped</em><em>!</em><em> </em><em>:</em><em>)</em></u>

5 0
2 years ago
It takes 4 hours to go fly to Atlanta, a city that is about 200 miles. How many miles have I flown in in 2.5 miles
Irina-Kira [14]

Answer:

x = 125

Step-by-step explanation:

4 hrs : 200 mi

2.5 hrs : x mi

4/2.5 = 1.6 hrs

200/1.6 = 125 mi

x = 125 mi

5 0
3 years ago
HELP I AM STUCK AND ITS DUE SOON
Mila [183]

Answer:

I'm not for sure about this one but if I did my math right it should be 68 sence it would be 48 if you didnt add 20

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3 years ago
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