the base of a 12 foot ladder is 4 feet away from a building. if the ladder reaches the flat roof how tall is the building

The building is one story tall

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