sandra deposit $3000 in an. ordinary annuity at the end of. each semiannual period is at 10% intrest compounded semiannually. find the. amount she will. have after deposit of 18 years

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.

For range i think it’s area

The answer should be c.