Which number is a prime number 87,51,31,39

36 inches/second = yards/minute how many yards?

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

Abcd is a square. what is the measure of angle bac