What is the median of 4, 8, 15, 16, 23?

The middle value of the ordered set is 15.

If a square has an area of 49, what is its perimeter?

Side = 7, so perimeter = 4 × 7 = 28.

Each term multiplies by 3, so 54 × 3 = 162.

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A bond pays 6% annual simple interest on $5,000. How much interest after 2 years?