Acarpenter’s sketch of a room does not include a scale. she measures a wall that has been built and finds that it is 51.2 feet long. on the blueprint, this wall is 8 inches long. what is the scale for this blueprint?

a.
1 in. : 6.4 ft.

b.
1 in. : 64 ft.

c.
1 in. : 408 ft.

d.
1 in. : 409.6 ft.