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White raven [17]
2 years ago
5

Calculate S30 for the arithmetic sequence defined by {an}={3.1n-2}

Mathematics
1 answer:
timurjin [86]2 years ago
3 0

Answer:

c) 1,381.5.

Step-by-step explanation:

First term = 3.1 *1 - 2 = 1.1

2nd term = 3.1*2 - 2 =  4.2

3rd term = 3.1*3 - 2 = 7.3

so the common difference d = 3.1.

S30  = (30/2) [ 2* 1.1 + (30-1) * 3.1)]

= 1,381.5.

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The cost of the five most popular items at an airport gift shop include a $12.99 decorative mug, a $2.99 postcard, a $3.49 keych
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The t-shirt that cost $15.29 is worth Denmark Krone 96.93

Which country and currency are to be chosen?

I chose Denmark and her Denmark Krone as the country's currency bearing in mind that the chosen item is the t-shirt whose dollar cost $15.29

In other words, the task at hand is to convert $15.29 which is the cost of t-shirt to the Denmark Krone whose exchange is Denmark Krone 6.3394

to $1

$1=Denmark Krone 6.3394

$15.29 t-shirt=Denmark Krone 6.3394*15.29

$15.29 t-shirt=Denmark Krone 96.93

Note that even if exchange rate was rounded to 4 decimal places, it is expected based on norm or industry practice that the final amount in Denmark Krone be rounded to 2 decimal places, in other words, the shirt at the airport gift shop whose cost $15.29 is Denmark Krone 96.93  in Denmark

Find out more about exchange rate on: brainly.com/question/21469251

#SPJ1

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