4. Marcus invested $4280 in a savings account that compounds interest monthly at a rate of 8.5%. If he leaves the money in the account for 6 years without making any
additional deposits or withdrawals, how much money will he have in his account at the end of 6
years?

ask your self frist how many months is in 6 years that would be 72 months so now you have 8.5% interest on the amount of $4280 for 72 monthsthe interest gained in 72 months would be $3047.37$4280+$3047= $8727. I think but not 100% sure

marco saved more.   he saved $35 more.

step-by-step explanation:

1+2+3+4+5+6+7+8+9+10 = 55

2*10 = 20

55-20 = 35