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3 years ago

How many diagonals are in a polygon with 14 sides.

Mathematics

1 answer:

Akimi4 [234]3 years ago

5 0

I think it's 77 sides

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What quantities are equivalent to 250 meters

Vsevolod [243]

Hello there,

Okay, well you have asked what quantities are equivalent to 250 meters well 250 meters would be...

25000 centimeters
0.25 kilometers
820.20 feet

Hope I helped,

Amna

6 0

3 years ago

Subtract.<br>18 – 7 = what's the answer<br>

Over [174]

Answer:

Step-by-step explanation:

Math

8 0

3 years ago

1. Find the value of the power. (1/2)4"

ioda

Answer:

Step-by-step explanation:

You would use PEMDAS( parentheses exponents multiply adding subtracting) (1/2)4.

o.5×4

5 0

2 years ago

In the past decades there have been intensive antismoking campaigns sponsored by both federal and private agencies. In one study

astra-53 [7]

Answer:

C. z = 2.05

Step-by-step explanation:

We have to calculate the test statistic for a test for the diference between proportions.

The sample 1 (year 1995), of size n1=4276 has a proportion of p1=0.384.

$p_1=X_1/n_1=1642/4276=0.384$

The sample 2 (year 2010), of size n2=3908 has a proportion of p2=0.3621.

$p_2=X_2/n_2=1415/3908=0.3621$

The difference between proportions is (p1-p2)=0.0219.

$p_d=p_1-p_2=0.384-0.3621=0.0219$

The pooled proportion, needed to calculate the standard error, is:

$p=\dfrac{X_1+X_2}{n_1+n_2}=\dfrac{1642+1415}{4276+3908}=\dfrac{3057}{8184}=0.3735$

The estimated standard error of the difference between means is computed using the formula:

$s_{p1-p2}=\sqrt{\dfrac{p(1-p)}{n_1}+\dfrac{p(1-p)}{n_2}}=\sqrt{\dfrac{0.3735*0.6265}{4276}+\dfrac{0.3735*0.6265}{3908}}\\\\\\s_{p1-p2}=\sqrt{0.00005+0.00006}=\sqrt{0.00011}=0.0107$

Then, we can calculate the z-statistic as:

$z=\dfrac{p_d-(\pi_1-\pi_2)}{s_{p1-p2}}=\dfrac{0.0219-0}{0.0107}=\dfrac{0.0219}{0.0107}=2.05$

z=2.05

4 0

3 years ago

300 miles is equal to how many yards

Novosadov [1.4K]

300 miles is equal to how many yards
= 528000

Hope this helps!

5 0

3 years ago

Read 2 more answers