The diameter of the moon is a little less than the distance across the united states. select the best answer from the choices provided t f

It is true that the diameter of the moon is a little less than the distance across the United States.

Option A

Explanation:

Moon is the natural satellite of our Earth. It revolves around the Earth due to the gravitational force acting on the moon. The moon also has its own gravitational force. The gravitational force of moon is of the gravitational force on Earth.

The mass of moon is kg while the mass of the Earth is kg. So the moon’s mass is very very less than that of Earth. So the diameter of moon is found as 3,472 km while the diameter of Earth is 12,742 km.

Thus the dimension of moon is of the dimension of the Earth. Even the diameter of moon is little less than the distance across the United States as the distance across United States is 4509 km.

it would be kevlar ^^

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.