Me with #5 part a and b give me the right answers ? ?

In which source of water would a wave travel the fastest? o ice o cold o room temperature o hot mark this and return save and exit next

If the wwight of a package is multiplied by 7/10 the result is 65.8 find the weight of the package

Asquare picture with sides of 32 inches is to be mounted on a square mat with sides of 52 inches. find the area of the mat that will remain uncovered by the picture.