Sam went on a hike. He hiked in a straight line 6.4 km east, then walked in a straight line going south for 4.6 km. Determine how far Sam was from his starting point at
this point in his hike, rounded to the nearest tenth of a km. Show all of your steps.

Please I need help asap

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x

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.

Aye asap pls ! markin da brainiest too ! btw da step choices are all add, distribute, divide, n subtract