Asaleswoman earns 5% commission on all the merchandise that she sells. last month she sold $9000 worth of merchandise. how much commission (in dollars) did she earn last month?

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