Which of these expressions represents the product of two rational numbers being rational?

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?

How many grams the dog will eat in 3 days?

Which term describes the point where the perpendicular bisectors of the three sides of a triangle intersect?