Given a rectangle of length a and width b if a and b are both rational numbers, will the perimeter be rational or irrational? give an example choosing your own values for a and b

Robert is replacing sod in two square shaped areas of his backyard.one side of the first area is 7.5 feet.one side of the other is 5.7 feet.the sod costs y dollars per square foot.

For a sewing project, maria divides 5 yards of fabric into 12 -yard strips. how many strips will maria have for her project?

Point s has coordinates (4,2). if you rotate s 90 degrees about the origin, (0,0), what are the coordinates of s’?