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3 years ago

I think it's B need assurance

Mathematics

1 answer:

Stella [2.4K]3 years ago

6 0

Answer:

Step-by-step explanation:

V = (4 * pi /3) * (38 + 0.16t)^3

t = 208 seconds.

V = (12.56/3) * (38 + 0.16 * 280)^3

V = 4.186 * ( 38 + 44.8)^3

V = 4.286 * (82.8)^3

V = 4.286 * 567663

V = 2433005 which is close enough. The precise answer will be obtained by using a better value for pi. Anyway that's the only answer that gives about 2.5 million so B is correct.

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What is the sum of the first 6 terms of this geometric sequence? –4, –16, –64, –256, …

MatroZZZ [7]

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The formula of the sum of a geometric sequence:

$S_n=a_1\cdot\dfrac{1-r^n}{1-r}$

We have:

$a_1=-4;\ n=6;\ r=4$

substitute:

$S_6=-4\cdot\dfrac{1-4^6}{1-4}=-4\cdot\dfrac{1-4096}{-3}=-4\cdot\dfrac{-4095}{-3}=-4\cdot1365=-5460$

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3 years ago

Inessa05 [86]

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2 years ago

In 2010, a city's population was 1,405,233 and it was decreasing at a rate of 1.1%. At this rate when will the city's population

frez [133]

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3 years ago

Which point has coordinates (0, -5) ?

inysia [295]

Answer:

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Step-by-step explanation:

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2 years ago

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Zielflug [23.3K]

Answer:

either x = 1.75 or x = 700 , question wasn't clear

Step-by-step explanation:

Because you put the x in front of 20 , you might be meaning x/20 (second answer listed)? Or, you put the variable on the wrong side of 20. (first answer listed)

If you meant to type 20x

35 = 20x

÷20 ÷20 *

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*divide both sides by 20 to isolate x

x = 1.75

(x = $\frac{35}{20}$ )

--------------------------------------------------------------------------

If you meant to type x/20

35 = $\frac{x}{20}$

·20 ·20 *

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*multiply both sides by 20 to isolate x

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2 years ago