1. Luis pesa 63 kg, y durante un día duerme 9 horas, está 7 horas sentado y 4 horas de pie, pasea durante 3 horas y ha ce deporte 1 hora. Si su comida le proporciona 2700 kcal al dia, ¿ganará o perderá peso?

I think that Luis is gaining weight, since a 2700 calorie diet is for a person who does high-performance activity, exceeding the hour and the means of work three times a week.

Although to be more exact, the age and height of Luis would have to be rigorously evaluated and from there to be able to promptly determine how many calories are necessary for his diet.

But so a simple view it is known that his routine with the amount of calories consumed is not compatible therefore this person would gain weight.

Explanation:

In these cases, it is very important that not only does Luis have a balanced diet, but that he do an activity that promotes the blood circulation of his lower limb since he may have difficulties in the venous return due to being in a resting or standing position for so long. An hour of physical activity is not enough to compensate for the blood stagnation of the rest of the activities that Luis has during the day.

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.