Answer:
Problem 1
A person's height and the speed required to reach Mars are two things that could be measured. Because a person's height can be measured with a low degree of precision, we don't need to be as precise. We might say something like, "that individual is around 6 feet tall," and anybody is listening would get an idea of their height. In contrast, we require great precision for a rocket speed to Mars because getting this value incorrect would very certainly lead to tragedy. Very complex mathematics is necessary to ensure that we strike the appropriate target in space.
Problem 2
As previously said, everything involving space travel necessitates extreme accuracy. If the calculations are incorrect, the spaceship may crash. In one case where things went wrong, engineers chose the incorrect parameters, resulting in the Mars lander slamming into the planet rather than landing safely. Due to the enormous expense of such space exploration missions, it is critical to get as exact and accurate information as possible. Things like mentioning a person's height aren't as important to be exact about because we can merely communicate approximations to whoever we're talking to. When opposed to a rocket launch, this informal environment does not need as much precision.
