Rachel earns $6.25 each week for doing chores. Bob earns $5.50 each week for doing chores. After 13 weeks, how much more will Rachel earn than Bob for doing chores?
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Pls! does anybody know a shortcut for answering these types of questions in the future?

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6