M LNM = . (thank you for whoever answers)

The answer is c because you turn 17.5% into a decimal which gives you .175 then you times that by $361.35 which gives you 63.23625 but then you round that which gives you 63.24. then you at 63.24 pulse 361.35 and you round it which gives you $425

Element 17 is chlorine it is a group 7 element(halogen) and belongs to period 3 of the periodic table