Astudent is measuring the effect of an electric circuit on a compass and he is testing to see if increasing the current will cause the compass needle to change its direction faster he does one trral using a 9-volt battery and another trial using a 1.5 volt battery he takes accurate data based on good experimental design which would improve his experiment

the higher the current the higher the mag field around it the higher the influence on the compass

568.98

explanation:

its math

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.