Determine the sum of the first 12 terms(s12) for a geometric sequence given the first term is 4 (a1=4)and the common ratio is 3(r=3) Please help

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490

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step-by-step explanation:

i hope this : )

0.85 or 85%

step-by-step explanation:

1) divide 23 by 27

2) round the decimal to the nearest 10

3) so your answer would be 0.85 or 85%