13.2/4 and show your work​

Acabinmaker buys 3.5 liters of oat varnish the varnish cost $4.95 per liter what is the total cost of 3.5 liters

Harry the hook has 7 1/3 pounds of cookie dough. she uses 3/5 of it to bake cookie. how much cookie dough does she use to make cookie?

Cole says the distance between points (-5,0) and (0,-5)is 5 units. is he correct? explain why or why not.