A number cube is rolled and a coin is tossed. The number cube and the coin are fair. What is the probability that the number rolled is less than 5 and the coin toss is tails?
Write your answer as a fraction in simplest form.

Carmen and matt are conducting different chemistry experiments in school. in both experiments, each student starts with an initial amount of water in a flask. they combine two chemicals which react to produce more water. carmen's experiment starts with 30 milliliters of water in a flask, and the water increases in volume by 8.5 milliliters per second. matt's experiment starts with 10 milliliters of water and increases in volume by 28% each second.