2 years ago

HELP PLEASE! :)

Mathematics

2 answers:

Serjik [45]2 years ago

6 0

Answer:

6.5 minutes

Step-by-step explanation:

Given :

⇒ 10 seconds to remove 3% of the total gas contained

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

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 + …

NemiM [27]

Answer:

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Step-by-step explanation:

Given:

$1+2+4+8+...$

Find:

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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

$S_n=\dfrac{b_1(1-r^n)}{1-r}$

Hence,

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3 years ago

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Answer:

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3 years ago

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