Please help me! I need this answered fast!

20 points!~

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?

Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9

Alex measured the length of an item to be 3.7 cm. the actual length is 3.5 cm. what is alex’s percent error?