Two cars leave the same parking lot, with one heading south and the other heading east. After several minutes, the southbound car has traveled 15 miles, and the eastbound car has traveled 20 miles. Measured in a straight line, how far apart are the two cars?

This is so hard and it’s for a test

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b.you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c.you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d.you spend $5 plus $10 per week until you have less than $45.

Can someone me and explain..will award brainlest!