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3 years ago

How many lines of symmetry does the figure below appear to have?

Mathematics

2 answers:

BabaBlast [244]3 years ago

5 0

Answer:

There are 3 lines of symmetry.

Step-by-step explanation:

There is one in the middle going vertically and horizontally, and there is one going diagonal.

Hope this helped!!

Vaselesa [24]3 years ago

4 0

Answer:

here is only one line of symmetry

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If a dozen eggs cost $1.35, what is the unit cost?

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3 years ago

What expression is equivalent to 5y^-3?

sineoko [7]

Answer:

$\frac{5}{y^{3}}$

Step-by-step explanation:

apply exponent rule:

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3 years ago

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3 years ago

What is the solution?

exis [7]

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Step-by-step explanation:

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3 years ago

When n=343 college students are randomly selected and surveyed, it is found that x=110 own a car. Find a 99% confidence interval

Liono4ka [1.6K]

Answer:

The margin of error will be "0.65". A further explanation is provided below.

Step-by-step explanation:

The given values are:

n = 343

x = 110

At 99% confidence level,

$\alpha = 1-99$ %

$=1-0.99$

$=0.01$

then,

$\frac{\alpha}{2} =\frac{0.01}{2}$

$=0.005$

or,

$Z_{\frac{\alpha}{2} }=Z_{0.005}$

$=2.576$

Now,

The point estimate will be:

⇒ $\hat{P}=\frac{x}{n}$

⇒ $=\frac{110}{343}$

⇒ $=0.321$

or,

⇒ $1-\hat{P}=1-0.321$

⇒ $=0.679$

The margin of error will be:

⇒ $E=Z_{\frac{\alpha}{2} }\times \sqrt (\frac{(\hat{P}\times (1 - \hat{P})) }{n} )$

On substituting the above values, we get

⇒ $=2.576\times \sqrt{\frac{0.321\times 0.679}{343} }$

⇒ $=2.576\times \sqrt{\frac{0.217959}{343} }$

⇒ $=0.065$

hence,

⇒ $\hat{P}-E$

⇒ $0.321-0.065$

⇒ $0.256,0.386$

6 0

3 years ago