On a 1616 scale drawing of a bike, one part is 3 inches long. how long will the actual bike part be?

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

Empty box + box + empty box fill in the box is equal to 30 how

Mario has $14.35 left in his wallet. he spent $148.43 for tablecloths. then, he spent $92.05 for napkins. how much money did mario have in his wallet to start with?