3 years ago

Tallest tower In the worl

Mathematics

1 answer:

stich3 [128]3 years ago

7 0

Answer: Burj Khalifa - 828 m ( 2,717 ft)

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Rename 28 percent as a decimal and fraction in its simplest form.

VARVARA [1.3K]

28% is 28/100 as a fraction but the simplest form is 14/50 and it can be simplified to 7/25. the decimal is 0.28

fraction is 7/25
decimal is 0.28

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3 years ago

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Larry and Donna bought a sofa at the sale price of $1,536. The original price of the sofa was $1,920.

ollegr [7]

Answer: $384

Step-by-step explanation:

1000- 1000=0

900-500=400

20-36=-16

400+-16=384

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4 years ago

How many calories are in 3oz of ground beef

zheka24 [161]

There are 282 calories in 3 oz of ground beef

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4 years ago

A random variable x takes four possible values, 0, 2, a, and b, where a and b are unknown numbers. if pr[x = 0] = 0.2, pr[x=2] =

Alexus [3.1K]

$\displaystyle\sum_{x\in\{0,2,a,b\}}\mathbb P(X=x)=1$
$\mathbb P(X=0)+\mathbb P(X=2)+\mathbb P(X=a)+\mathbb P(X=b)=1$
$0.2+0.4+0.3+\mathbb P(X=b)=1$
$\implies\mathbb P(X=b)=0.1$

$\mathbb E(X)=\displaystyle\sum_{x\in\{0,2,a,b\}}x\mathbb P(X=x)=2.8$
$0\mathbb P(X=0)+2\mathbb P(X=2)+a\mathbb P(X=a)+b\mathbb P(X=b)=2.8$
$0.8+0.3a+0.1b=2.8$
$0.3a+0.1b=2$

$a+b=6\implies0.3a+0.1b=0.2a+0.1(6)=2$
$0.2a+0.6=2\implies0.2a=1.4\implies a=7$

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3 years ago

What is all of the rotation rules? (geometry)

prohojiy [21]

Answer:

These are the rules of rotation for geometry.
1) 90° clockwise rotation: (x,y) becomes (y,-x)

2) 90° counterclockwise rotation: (x,y) becomes (-y,x)

3) 180° clockwise and counterclockwise rotation: (x, y) becomes (-x,-y)

4) 270° clockwise rotation: (x,y) becomes (-y,x)

5) 270° counterclockwise rotation: (x,y) becomes (y,-x)

Step-by-step explanation:

I hope this helps! I also added a picture to make this more clear.

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2 years ago