Light travels in waves. Which of the following statements about light waves is NOT true? A
They travel in straight lines.
B.
They can travel through any substance.
С
They can come from natural or artificial sources.
D
They change direction when they are reflected or refracted.

im almost positive it is  A

They travel in straight lines.

Explanation:

1= 26.17

2= 1.17

3=30.86

4=5.86

just took the assigment on edge

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.