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3 years ago

Calculate the perimeter

Mathematics

2 answers:

Gre4nikov [31]3 years ago

8 0

Answer:

240

Step-by-step explanation:

(10 x 8) / 2 = 40

+ 20 x 8 = 160 + 40 = 200 + 40 = 240

second triangle

evablogger [386]3 years ago

5 0

Answer:

Step-by-step explanation:

You use Pythagorean Theorem to to find the missing side which in this case is 6 and since and then from there you just add

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I've wasted 42 points already. Can someone PLZ just answer my Question and stop wasting my points. PLz, this is due. I need help

Misha Larkins [42]

Step-by-step explanation:

You can put the value of x into the equation to solve for y. Hopes this works.

5 0

2 years ago

Wendy borrowed a 370-page book from the library. She has already read 20 pages. The book is due back to the library in 7 days. W

Leviafan [203]

Answer:

n ≥ 50

Step-by-step explanation:

Total pages = 370

Read pages = 20

Number of days remaining = 7

Reading rate per day = n

7n + 20 ≥ 370

7n ≥ 370 - 20

7n ≥ 350

n ≥ 350/7

n ≥ 50 pages per day for the remaining 7 days

5 0

3 years ago

A researcher is interested in whether people are less able to identify emotions correctly when they are extremely tired. It is k

stepan [7]

<h2>Answer with explanation:</h2>

Let $\mu$ be the population mean.

By analyzing the given information, we have the following hypothesis:-

$H_0:\mu\geq81\\\\H_a:\mu$

Since the alternative hypotheses is left tailed so the test is a right-tailed test.

Also, the accuracy ratings of people in the general population are normally distributed.

Given : Sample size : n=51 , since n>30 so we use z-test.

Sample mean : $\overline{x}=79$

Standard deviation : $\sigma=\sqrt{20}\approx4.47$

Test statistic for population mean :-

$z=\dfrac{\overline{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}$

$\Rightarrow\ z=\dfrac{79-81}{\dfrac{4.47}{\sqrt{51}}}\\\\\Rightarrow\ z\approx-3.195$

Critical value (one-tailed) corresponds to the given significance level :-

$z_{\alpha}=z_{0.05}=1.645$

Since the observed value of z (-3.195) is less than the critical value (1.645) , so we do not reject the null hypothesis.

Hence, we conclude that we do not have enough evidence to accept that people are less able to identify emotions correctly when they are extremely tired .

3 0

3 years ago

The volume of a sphere is given by the equation ????=4/3????????³, where ???? is the radius. Calculate the volume of a sphere wi

qwelly [4]

Answer: 708017151.707 m^3

Step-by-step explanation:

Volume of a sphere has the equation of

V=4/3(pi)r*r*r=4/3(pi)r^3

r=553 m

4/3(pi)553*553*553=4/3(pi)553^3=4/3(pi)169112377

=676449508/3(pi)=225483169.333(pi)=708017151.707 m^3

Where pi=3.14

8 0

3 years ago

Read 2 more answers

The Richter scale measures the magnitude, M, of an earthquake as a function of its intensity, I, and the intensity of a referenc

expeople1 [14]

Answer:

The equation is = I = $e^{4.8}$

Step-by-step explanation:

As given ,

M - magnitude of an earthquake

I - intensity of earthquake

I₀ - intensity of a reference earthquake

The relation between the three is as follows :

M = log( $\frac{I}{I0}$ )

As given -

M = 4.8, I₀ = 1

⇒ 4.8 = log( $\frac{I}{1}$ ) = log(I)

⇒ 4.8 = log(I)

⇒I = $e^{4.8}$

So, the equation becomes I = $e^{4.8}$

8 0

3 years ago

Read 2 more answers