Answer: 3.75 mg
Explanation:
We need a dose of 2.50 mg per square meter of BSA, and we also know that the BSA of the child is 1.50 m^2, then if the dosage should be 2.50mg for one m^2, for 1,5 m^2 we should administrate an amount of:
D = 1.5 m^2*(2.50mg/m^2) = 1.5*2.5 mg = 3.75 mg