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% of 200 miles is 150 miles

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me

The unpaid balance on a mastercard charge was $1,056.23. during the month, payments of $300 and $250 were made and charges of $425 and $274.16 were added. if the finance charge is 1.2% per month on the unpaid balance, find the new balance at the end of the month. $1,205.39 $1,218.06 $918.06 $1,768.06

Need me know if option a,b,c are wrong so ik its d