Answer: OPTION C.
Step-by-step explanation:
Given the following formula:
You know that "S" is the smelliness of cheese, "B" is the number of bacteria in the cheese and "A" is the surface area in square centimeters of the cheese.
For example, suppose that there are in a surface area of
.
Substitute into the formula these values:
And then evaluate:
Therefore, you can conclude that the appropriate measurement unit for "S" is:
Yes, parentheses can change the order in which operations are performed in an expression.
Let us understand this with two examples.
First example.
Let us suppose we have to simplify the expression
In this expression we have evaluated subtraction first instead of multiply.
Second example.
Let us suppose we have to simplify the expression
In this expression we have evaluated multiplication first and then subtraction.
Therefore, from above two examples we can see that parentheses can change the order in which operations are performed in an expression.