Which figure is a prism?
A. A figure has 3 rectangular faces and 2 triangular faces.
B. A figure has 3 triangular faces the combine to form a point.
C. A figure has 3 triangular faces the combine to form a point.
D. A figure has 3 triangular faces the combine to form a point.

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.