Mr. Smith is a high school history teacher whose salary is $33,660 for the school year, which has 180 days. In Mr. Smith's school district, substitute teachers are paid $85 per day. If Mr. Smith takes a day off without pay and a
substitute teacher is paid to teach his classes, how much less does the school district pay in salary by paying a
substitute instead of Mr. Smith for that day?
If the area of a square with one side x is 9, what is the area of a square of side 4x?
If x is a real number such that x³ = 729, then x² + √x = ?
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