It takes dylan 3 days to travel from new york to california. how many hours does it take dylan to arrive at his destination

3 days = 24 hours x 3 = 72 hours

Most likely a is the answer - because  you generate   38 atp's but also consume an atp.   each atp gives approx. less than 4 kcal so probably a is the closest answer.

The density of water is 1 g/cm cubed and in order for the pebble to sink its density has to be greater than the density of water and in order for the twig to float its density has to be less than the density of water