In a 30-60-90 triangle, what is the length of the hypotenuse when the shorter leg is 7 in.?
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How do you find the circumfrance of a circle?

Consider the set of all four-digit positive integers less than 2000 whose digits have a sum of 24. what is the median of this set of integers?

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of