Acube shaped box has sides 10 cm in length. what are the dimensions of the largest cone that fits inside thus box.

Look at the attached diagram.

The base of this cone would be a circle touching all of the edges of the cube's base. You can see that the diameter of the base is going to be 10 cm, and that the radius would then be 5.
As for the height, it would be at its largest going from top to bottom in that cube, which is 10 cm.

r = 5 cm
d = 10 cm
h = 10 cm

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