Which of the following expresses 393,500 in scientific notation?
0.3935 x 10^-6
3.935 x 10^-6
3.935 x 10^5
39.35 x 10^4

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.

Proportions in triangles solve for x

You are riding your bike and notice the square sign above. you mentally draw a straight line from point a to c. describe the angle relationship between dca and bca