Mary will be 24 years old when she will be twice as old as
her brother.
Here's how this has been calculated:
If Mary is 16 years old and 4 times older than her brother,
her brother's age
= 16/4
=4
Mary’s brother is therefore 4 years old.
Now let’s calculate the difference between Mary and her
brother’s age through subtraction:
Mary’s age- her brother’s age= 16-4
=12
Therefore, Mary is 12 years older than her brother
So, for Mary to be twice as old as her brother, the formula
will be= 12*2
=24
Therefore, Mary will be 24 years old when she will be twice as old as
her brother.
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Karla is demonstrating false uniqueness .
<h3>False uniqueness </h3>
The false-uniqueness effect is an attributional type of cognitive bias in social psychology that describes how people tend to view their qualities, traits, and personal attributes as unique when in reality they are not.
Learn more about false uniqueness here :
brainly.com/question/11262522
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I believe the answer is: D. <span>industrial activity harming the environment
Many companies from developed countries decided to opened up their factories in south east asia due to its natural resource availability and the amount of cheap labors.
Even though this improve the average income of people in those regions, they have to face the negative effect of the industrial activity such as pollution, land degradation, deforestation, etc.</span>