Each group of 2 nickels and 1 quarter has a value of $0.35. Rachelle has $6.30/$0.35 = 18 such groups.
Rachelle has 18 quarters and 36 nickels.
I would do 1/2 base* height pi and the cross out pi and divide 120 by 12
and your answer is :10...im not for sure but hopefully it helped.