2 years ago

Which calculation and answer show how to convert

Mathematics

1 answer:

expeople1 [14]2 years ago

3 0

Answer:

The first option. See attachment.

Step-by-step explanation:

Explained on attached image.

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2. If the sum of the first 12 terms of a geometric series is 8190 and the common ratio is 2. Find the first term and the 20th te

alexandr1967 [171]

the first term is 2 and the 20th term is 1048576 .

Step-by-step explanation:

Here we have , If the sum of the first 12 terms of a geometric series is 8190 and the common ratio is 2. We need to Find the first term and the 20th term. Let's find out:

We know that Sum of a GP is :

⇒ $S_n = \frac{a(r^n-1)}{r-1}$

So ,Sum of first 12 terms is :

⇒ $S_1_2 = \frac{a(2^{12}-1)}{2-1}$

⇒ $8190=a(2^{12}-1)$

⇒ $\frac{8190}{4095}=a$

⇒ $a=2$

Now , nth term of a GP is

⇒ $a_n = ar^{n-1}$

So , 20th term is :

⇒ $a_2_0 = 2(2)^{20-1}$

⇒ $a_2_0 = (2)^{20}$

⇒ $a_2_0 = 1048576$

Therefore , the first term is 2 and the 20th term is 1048576 .

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dezoksy [38]

Answer:

14.85

Step-by-step explanation:

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3 years ago

There are a total of 368 sea turtles. The pollution and trash have decreased the population of sea turtles by 12% every year. Ho

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Answer:

There will be 61.4617934 sea turtles or about 62

Step-by-step explanation:

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3 years ago

Pls helppp I will mark brainlist if correct !! :)

klemol [59]

Answer:

J) 2.4

Step-by-step explanation:

8[6.3-4(1.5)] Simplify the expression 2.4

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If a/2 = b/3, then b/a = ? A. 3/2 B. 2/3

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It would be A because b+a

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