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Crazy boy [7]
3 years ago
5

What is the sum of the first five terms of a geometric series with A1 equals 20 and R equals 1/4

Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
6 0
Sum = 20(1-(1/4)^5) / (1-1/4) = 26.64
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The answer is 45 because you do parenthesis first which is 13.5-4.5=9 then you multiply 9×5=45 therefore the answer is 45.
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3 years ago
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The average price of an item is $42 with a standard deviation of $3
FinnZ [79.3K]

The mean price goes between $ 41.16 and $ 42.84, so a value of $ 48 is unusually high.

Since the average price of an item is $ 42 with a standard deviation of $ 3, to find a 98% confidence interval about the mean, and determine if a value of X = 48 is unusually high or if it is normal, the following calculations should be done:

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Therefore, as the mean price goes between $ 41.16 and $ 42.84, a value of $ 48 is unusually high.

Learn more about maths in brainly.com/question/25908442

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2 years ago
I'm gonna cry someone please help.
Nostrana [21]

Answer:

Median for a: 50 because it is in the middle of the points

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Step-by-step explanation:

What i do is i write all the numbers out as shown in graph and cross one out on both sides untill there is one left.

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IQR B: 15

Find the 25 percentile the. the 75 pecentile then subtract the numbers off from eachother.

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Answer:

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Arlecino [84]

Answer:

y=x*7

Step-by-step explanation:

63=9*7

28=4*7

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