HELP PLEASE:(I don’t get it and it’s do soon whoever gets it right I’ll give you a crown

What is the y-intercept of the graph of the equation y=3(2^x)

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?

Ametal rod is 2/5 meters long. it will be cut into pieces that are each 1/30 meters long. how many pieces will be made from the rod?