The ladders shown below are standing against the wall at the same angle. how high up the wall does the longer ladder go? (the high ladder is 30 and we trying to find the height. the small ladder is 24 and it's height is 10)

Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes.she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?