When b > 0 and d is a positive integer, the expression (3b)^2÷d is equivalent to what?

What is the approximate total length of iron edging needed to create the square frame and the two diagonals?

"you know, playing tennis is healthier than watching a tennis match on television," katya remarked to her couch potato brother. in this sentence, healthier is a/an a. superlative. b. comparative. c. positive form. d. adverb.

A25- foot ladder leans against a building and reaches a point of 23.5 feet above the ground .find the angle that the ladder makes with the building