Molly invested $400 into an account with a 5.5% interest rate compounded monthly. How much will Paul's investment be worth in 8 years? (Round to the nearest cent) Write answer with dollar sign

Isabelle is mixing red and blue paint to make purple paint she adds 3/10 of a fluid ounce of red to 12/25 of a fluid ounce of blue to make 1 1/30 fluid ounces of purple how many fluid ounces of red paint ounces of red paint will she need to make 3 fluid ounces of purple paint