Ablueprint for a house shows the height of the house to be inches. the actual house is feet tall. what is the unit rate in feet per inch?

Problem fathi wants to print out a pdf document that is 48 pages long. to save paper, he decides to print on both sides of each sheet and to print two pages on each side of the sheet. how many sheets of paper will he need?

Can someone explain to me how to do

If point a= (10,4) and b= (2,19) what is the length of ab 17 units 15 units 23 units 12 units