5 Select the correct answer.
Glven a sample mean of 3.56 and a standard deviation of 0.98, which value falls within the 90% confidence interval for a sample size of 45?
OA 3.83
OB. 3.21
O c. 3.57
OD. 3.28

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.