Doctor gave the mother of a child a 32 oz bottle of liquid medication and told her the child should take 45 mL twice a day. How many total fluid ounces will the child take in one day?
There are 30 mL in 1 fluid ounce.
The child takes 45 mL twice a day, so they take 45 mL x 2 = <<45*2=90>>90 mL a day.
There are 30 mL in 1 fluid ounce, so 90 mL is 90 / 30 = <<90/30=3>>3 fluid ounces.
Therefore, the child will take a total of 3 fluid ounces in one day. Answer: \boxed{3}.