(easy) geometry - i think it's the 2nd one or 3rd one (half of 72 is 36) i may be overthinking, can someone

What is 1/3x5 on anuber line what does it look like on a number line

Kai walked one and two-thirds of a mile on saturday and four and one-sixth of a mile on sunday. how many miles did kai walk?

Ian is in training for a national hot dog eating contest on the 4th of july. on his first day of training, he eats 4 hot dogs. each day, he plans to eat 110% of the number of hot dogs he ate the previous day. write an explicit formula that could be used to find the number of hot dogs ian will eat on any particular day.