A person walks 30 km west, 20 km
north, then 15 km east. What is her
final position?

I THINK it's 60km Because i pretty sure you multiply or divide it but, thats what i got.

Explanation:

30 x 20 = 60km

60 x 15 = 60km

anything times zero equals zero

division:

30 ÷ 15 = 02

20 x 02 =20

what best describes physical development during adolescence is the development of secondary sex characteristics happens at a rate unique to each individual.

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.