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Georgia [21]
3 years ago
10

Evaluate 12 sigma n=3 20(0.5)^n-1 9.99 19.95 29.98 39.96

Mathematics
2 answers:
posledela3 years ago
3 0

Answer:

We have a geometric series in which:

a = 20

r = 1/2

Now, we know that: S2 = 20(1-r^2)/(1-r)  and S12 = 20(1-r^12)/1-r

Therefore:  sigma(3,12) = S12-S2  = 20[(1-r^12)/(1-r) - (1-r^2)/(1-r)]  =5115/512  = 9.99023438

Therefore, the answer is: 9.99

Ilya [14]3 years ago
3 0

Answer: Is D

Step-by-step explanation:

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iris [78.8K]
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3 years ago
What are the coordinates of the<br>3/4<br>point of the way from A(-6, -3)<br>to B(10,9)?​
zalisa [80]

Answer:

The coordinates of the point are (6, 6).

Step-by-step explanation:

Find the difference in x-coordinates.

10 - (-6) = 16

Find 3/4 of the difference in x

3/4 * 16 = 3/4 * 16/1 = 48/4 = 12

Add 12 to the x-coordinate of point A.

-6 + 12 = 6

The x-coordinate is 6.

Now we do the same for the y-coordinates.

Find the difference in y-coordinates.

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Find 3/4 of the difference in y

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Add 9 to the y-coordinate of point A.

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The y-coordinate is 6.

Answer: The coordinates of the point are (6, 6).

7 0
4 years ago
Evaluating Logarithms In Exercise, evaluate the logarithm without using a calculator.<br> log10 1
blsea [12.9K]

Answer:

0

Step-by-step explanation:

To evaluate log10 1 without using a calculator

From the laws of logarithm,

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Then a^x = b

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a^0 = 1

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8 0
3 years ago
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Alina [70]
987 mm is the answer
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4 0
3 years ago
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Ariana has $1.40 worth of nickels and dimes. She has twice as many nickels as dimes. Determine the number of nickels and the num
navik [9.2K]

Answer:

14 nickels

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Step-by-step explanation:

1. find out how many dimes there has to be to get $1.40

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so there are 7 dimes

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there are 14 nickels

proof:

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hope this helps!

7 0
4 years ago
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