Pls help im very stuck

Aparking garage charges $1.12 for the first hour and 0.50 for each additional hour. what is the maximum length of time tom can park in the garage if we wishes to play no more than $5.62

If johnny ate 5 cans of sugar, but in the kitchen they only had 3. what did johnny eat? (he found a secret stash btw.)

Use the balanced scale to find the conversion factor that can be used to convert the number of blocks to the weight of the blocks in pounds.