If a square mirror has a 20-inch diagonal, what is the approximate perimeter of the mirror, in inches?

The probability is 1/2 that a coin will turn up heads on any toss. If the coin is to be tossed three times, wh...

A rectangular box is 10 inches wide, 10 inches long, and 5 inches high. What is the greatest possible (straigh...

A small square region inside a larger square is shaded. The diagonal of the larger square is three times the d...

In a class of 55 students, 18 take music, 26 take art, and 2 take both art and music. How many students in the...

70 students are enrolled in Management, Accounting and Marketing. 40 students are in Management, 35 are in Acc...

In what ratio should a 20% methyl alcohol solution be mixed with a 50% methyl alcohol solution so that the res...