Choose the correct answer to complete the sentence about how the wave is affected by the brick wall. Rougher sections of the wall surface will cause the___ from the emergency vehicle to scatter.

sound waves
light waves
sound and light waves

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.