Hello friends i need your i'm trying to my 2nd grader with her home work, i have been out of school for many years and i'm kind of lost with this one will someone me .. it's arrow notation..

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?

Solve 2x − 1 = 11 for x using the change of base formula log base b of y equals log y over log b.

20 points - ! gia decides to buy square tiles to cover her kitchen floor. the tiles are 18” square tiles and cost $3.85 each. how much will it cost to tile her kitchen if the measurements are 11’ x 12’?