Una persona camina una media de unos 2.000 pasos en un kilómetro y medio, quemando aproximadamente 100 calorías, según Meadows. "Medio kilo de grasa equivale a 3 500 calorías", aseguraba en 'Popsugar'. Entonces, para perder medio kilo por semana, un objetivo saludable según los expertos, necesitarías quemar 1 000 calorías por día. "Eso significa que debes apuntar unos 10 000 pasos diarios, lo que equivale a 7,5 km", añade. Cuántos kilos perdería una persona si 10 km, todos los días durante una semana. *

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.