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Answer:</h2><h2>The expression to give the requested sum after simplifying,

=

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Step-by-step explanation:
To find the sum of first 20 terms,
a = 6, r = 3
By formula, 
substitute the values in the above formula, the equation becomes,


= 
1 is expressed in decimal simply as 1.00
23/100 is expressed in decimal by 0.23
1 is a whole number and for it to become a decimal we must convert it into a fraction and perform division. 1 in fraction form is simply 1/1 which equals to 1.
23/100 to become decimal we need to divide 23 by 100. It will give us a quotient of 0.23
Answer:
44.3 would be the correct answer if I looked at it correctly