Open the simulation in Intro mode, and select both Grid and Bar Graph. What happens to the PEG of your skater as you click and drag her vertically? What affects how much the PEG changes? Increase the mass of your skater and repeat step one. Does this change her gravitational potential energy?
Knowing that the acceleration due to gravity (g) on earth affects an object’s gravitational potential energy,
and taking into account your observations from steps one and two, write an equation for PEG

divide the right side by the left side

0.024÷1.2=0.02 for example

f=ma newton's second law 7x8=56n

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.

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )