An astronaut has a mass of 82.0 kg. what is the astronaut's stationary weight at a position 4230 kilometers above earth's surface? note: earth's radius is 6380 km.

if you already have the answer to (a), then just work out how many periods there are in 1 minute, and that's the answer to (c).

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.