Who wants to talk I’m bored

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression

Marion has a bicycle that she is planning to take for a ride. the rim of the rear wheel lies 41 cm from the center of the wheel. the tire itself has a thickness of 3 cm. in order for marion to ride her bicycle 96,712 cm approximately how many rotations will the rear wheel make?

Mr. mole left his burrow and started digging his way down.a(t) models mr. mole's altitude relative to the ground (in meters) after t minutes. a(t)=-2.3t-7 how fast did mr. mole descend?