$9 per hour for 14 hours the first week can be found by doing 9 • 14, which equals 126. In the first week, Erika earned $126. $9 per hour for 20 hours for the second week can be found by doing 9 • 20, which equals 180. In the second week, Erika earned $180. To find the total amount Erika earned in both weeks, add how much she made in week 1 to how much she made in week 2. 126 + 180 = 306 Erika made $306 during these 2 weeks.
You just add the two lengths and then do pythagorean theory to get the length of the hypotenuse. Then you add them all together to get 18.8. Hope this helps.
