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Artemon [7]
3 years ago
14

If a/b and c/d are rational expressions, then which of the following is true?

Mathematics
1 answer:
tatiyna3 years ago
4 0
It’s al going to be true
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What, roughly, is the percent uncertainty in the volume of a spherical beach ball whose radius is r = 2.86 plus or minus .09 m?
Aleksandr-060686 [28]
The volume of a sphere is calculated through the equation,
  
       V = 4πr³ /3
where r is the radius of the given. 

If the radius is 2.86, we can substitute the value to the equation above such that,
         V = 4π(2.86)³ / 3 = 97.99π m³

When the radius is 0.09 m plus the given radius then,
       V = 4π(2.86 - 0.09)³ / 3 = 89.03π m³

The difference between the volumes is equal to,
       difference = 97.99π - 89.03π m³ = 8.96π m³

Dividing this to the original volume and multiplying by 100%,
    percentage = (8.96π/97.99π) x 100% 
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Hence, the expected percent uncertainty is equal to 9.14%. 
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3 years ago
What is slope if the line x=-1
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Step-by-step explanation:

Vertical line => Slope is Undefined.

6 0
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Solve. 12 – (2 × 3) A. 6 B. 12 C. 12(2) D. 23
atroni [7]
12-\bigg(2*3\bigg) \\  \\ 12 -6  \\  \\ \boxed{\boxed{\boxed{\pmb{=6}}}}
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4 years ago
P(A)=7/20,P(B)=3/5,P(A∩B)=21/100 ,P(A∪B)=?
icang [17]
P(A U B) = P(A) +P(B) - P(AB) \\  \\ = \frac{7}{20} +\frac{3}{5} - \frac{21}{100} \\  \\ = \frac{35}{100} +\frac{60}{100} - \frac{21}{100}  \\  \\ =\frac{74}{100}  \\  \\ =\frac{37}{50}
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alukav5142 [94]

Answer:

I think its A

Step-by-step explanation:

correct me if im wrong

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