I think its a :) if not c
Answer:
Half the age of Carlos four years ago is 2 years more than one-third his current age.
Step-by-step explanation:
We want to write a word problem for the equation.

Let x represent the present age of Carlos.
Four years ago, Carlos was x-4 years.
Half his age four years ago is ½(x-4)
Two years more than one-third his current age is ⅓x+2
X is something you could factor out or 4x
Calculate 3-4 = -1 that is the value
Answer:

The population of city is 10 millions in year 2015 that is 5 years after 2010.
Step-by-step explanation:
We are given the following information in the question:
The population of a city, P, in millions, is a function of t.

where P is the population of city in millions and t is the number of years after 2010.
We have to interpret the meaning o the statement f(5) = 10.

Interpretation:
Comparing the relation we get,
It means that the population of city is 10 millions in year 2015 that is 5 years after 2010.