Lana also bought three bags of whistles with eight whistles in each bag when the party started lana found that 19 of the party favors were broken how many unbroken party favors where there explain your answer

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.