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2 years ago

15

Which figures are polygons?

2 answers:

kari74 [83]2 years ago

6 0

Answer:

triangles

Step-by-step explanation:

Triss [41]2 years ago

3 0

<span>A polygon is any 2-dimensional shape formed with straight lines. Triangles, quadrilaterals, pentagons, and hexagons are all examples of polygons.</span><span> A triangle has three sides, and a quadrilateral has four sides.

-https://www.google.com.tw/search?q=Which+figures+are+polygons%3F&ie=utf-8&oe=utf-8&client=firefox-b-...
</span>

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Rosetta wants to estimate the percentage of people who rent their home. She surveys 250 individuals and finds that 48 rent their

Andreas93 [3]

Answer:

$0.192 - 1.645\sqrt{\frac{0.192(1-0.192)}{250}}=0.151$

$0.192 + 1.645\sqrt{\frac{0.192(1-0.192)}{250}}=0.233$

Step-by-step explanation:

Information given

$X= 48$ number of people who rent their home

$n= 250$ represent the sample size

$\hat p =\frac{48}{250}= 0.192$ represent the proportion of people who rent their home

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 90% of confidence, our significance level would be given by $\alpha=1-0.90=0.1$ and $\alpha/2 =0.05$ . And the critical value would be given by:

$z_{\alpha/2}=\pm 1.645$

The confidence interval for the mean is given by the following formula:

$\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$

If we replace the values obtained we got:

$0.192 - 1.645\sqrt{\frac{0.192(1-0.192)}{250}}=0.151$

$0.192 + 1.645\sqrt{\frac{0.192(1-0.192)}{250}}=0.233$

3 0

2 years ago

Which of these is the absolute value parent function?

bija089 [108]

Answer:

D. f(x) = |x|

Step-by-step explanation:

The absolute value parent function has nothing added or subtracted or multiplied. It is simply ...

f(x) = |x|

8 0

2 years ago

The given figure is a cylinder. The radius of

lesantik [10]

Answer:

11403.98133

Step-by-step explanation:

V = πr^2h = π·11^2·30 ≈ 11403.98133

8 0

2 years ago

Sarah walks to school, 1.5 miles in 30 minutes. what is the snswer to this

nevsk [136]

Answer: 3 mi/h

Step-by-step explanation:

Here we have to find the speed $V$ at which Sarah walks to school, knowing the distance $d$ she has walked and the time $t$ she expends.

So, in this case we can use the following equation:

$V=\frac{d}{t}$

Where:

$d=1.5 mi$

$t=30 min \frac{1 h}{60 min}=0.5 h$

Solving:

$V=\frac{1.5 mi}{0.5 h}$

$V=3 mi/h$ This is Sarah's speed

5 0

2 years ago

Emily's younger brother, Kenny, begged her to make him a superhero costume for Halloween this year, so of course Emily did! Emil

iris [78.8K]

Answer:

20 inches

Step-by-step explanation:

Since the cape is trapezoid shaped and has an area of 600 in², the area of a trapezoid is given by

A =1/2(a + b)h where a = length along the top of the cape = 24 in, b = length along the bottom of the cape = 36 in and h = height of the cape

So, h = 2A/(a + b)

= 2 × 600 in²/(24 in + 36 in)

= 1200 in²/60 in

= 20 in

So, the height of the cape is 20 inches

6 0

2 years ago