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2 years ago

Could someone help me with this pls

Mathematics

1 answer:

barxatty [35]2 years ago

8 0

Answer:

7.99

Step-by-step explanation:

using the formula

$v = \pi \: r ^{2} h$

$3014.4 = 22 \div 7 \times r ^{2} \times 15$

$21100.8 = 22 \times 15 \times r {}^{2}$

$21100.8 = 330 \times r {}^{2}$

$21100.8 \div 330 = r {}^{2}$

$\sqrt{63.94 }= r$

$r = 7.99ft \: answer$

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Answer:

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3 years ago

HELP!Please solve! this!!

Angelina_Jolie [31]

Answer:

Recursive formula for geometric sequence

$a_{n}=a_{n-1}\times r$

is $a_{n}=a_{n-1}\times 6$

and explicit formula for geometric sequence $a_{n}=a_{1}^{r-1}$ is

$a_{n}=(\frac{1}{2})^{6-1}$

Step-by-step explanation:

Given sequence is $\frac{1}{2},3,18,108,648,...$

To find the recursive and explicit formula for this sequence:

Let $a_{1}=\frac{1}{2},a_{2}=3,a_{3}=18,a_{4}=108,a_{5}=648,...$

To find the common ratio r:

$r=\frac{a_{2}}{a_{1}}$

$=\frac{3}{\frac{1}{2}}$

$=3\times 2$

$=6$

Therefore r=6

$r=\frac{a_{3}}{a_{2}}$

$=\frac{18}{3}$

$=6$

Therefore r=6

Therefore the common ration r=6

Therefore the given sequence is geometric sequence

Recursive formula for geometric sequence is $a_{n}=a_{n-1}\times r$

$a_{n}=a_{n-1}\times 6$

and explicit formula is $a_{n}=a_{1}^{r-1}$

$a_{n}=(\frac{1}{2})^{6-1}$

$=(\frac{1}{2})^{5}$

$=\frac{1}{32}$

Therefore $a_{n}=\frac{1}{32}$

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3 years ago

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3 years ago

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liubo4ka [24]

Answer:

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Step-by-step explanation:

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