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docker41 [41]
3 years ago
8

Find the product. 5x2.2y2

Mathematics
1 answer:
ozzi3 years ago
3 0

Answer:10x^2y^2

Step-by-step explanation:

5x2 X 2y2=10x^2y^2

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Niobium-91 has a half-life of 680 years. After 2,040 years, how much niobium-91 will remain from a 300. 0-g sample? 3 g 18. 75 g
alekssr [168]

Answer:

Amount of Niobium-91 initially

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2040 years = 3 ×680 = 3 half-lives

therefore, amount left = 0.4121mol

mass of Niobium-91 remaining = 0.4121 ×91 =37.5g

Please give brainliest

8 0
2 years ago
What is the answer to -3x = 4.2 ?
hammer [34]

Answer:

- 3x = 4.2 \\  - x =   \frac{4.2}{3}  \\  - x = 1.4 \\ x =  - 1.4 \\ thank \: you

4 0
2 years ago
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mamaluj [8]

The answer is Y

Step-by-step explanation:

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5 0
2 years ago
If cos x= sin(20 + x)° and 0° < x < 90°, the value of xis
ruslelena [56]

Answer:

draw a right angle triangle

Step-by-step explanation:

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cos A = sin (90-A)  

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4 0
3 years ago
Emily is adding 51 and 29 which steps can she use to add the numbers
frutty [35]

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she got this by adding 51 + 29

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