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il63 [147K]
2 years ago
11

HELP PLEASE! :)

Mathematics
2 answers:
Serjik [45]2 years ago
6 0

Answer:

6.5 minutes

Step-by-step explanation:

Given :

⇒ <u>10 seconds</u> to remove <u>3%</u> of the <u>total gas contained</u>

============================================================

Solving :

⇒ Time taken to remove 99% of the gas = 99%/3% × 10 seconds

⇒ Time taken = 33 × 10 = 330 seconds

⇒ Time taken = 6 minutes 30 seconds

⇒ Time taken = 6.5 minutes

omeli [17]2 years ago
6 0

Step-by-step explanation:

hope you can understand

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Find S11 for 1 + 2 + 4 + 8 + …
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Answer:

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Step-by-step explanation:

Given:

1+2+4+8+...

Find:

S_{11}

You are given the geometric sequence. From the given sum, you can see that

b_1=1\\ \\b_2=2=1\cdot 2=b_1\cdot 2\\ \\b_3=4=2\cdot 2=b_2\cdot 2\\ \\b_4=8=4\cdot 2=b_3\cdot 2\\ \\....\\ \\r=2

To find the sum S_{11}, use formula

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Hence,

S_{11}=\dfrac{1\cdot (1-2^{11})}{1-2}=\dfrac{1-2,048}{-1}=2,047

5 0
3 years ago
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telo118 [61]

Answer:

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7 0
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