Answer:
45 - 25 = 20 / 10 = 2 meaning he used the boat for 2 hours.
Explanation:
Its the same this as before you start by writing it out how the way PEMDAS works. PEMDAS is ( Parenthesis, Exponents, Multiplication, Division, Adding, and Subtraction). Also i accidentally messed up my other answer so give me a sec.