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NikAS [45]
3 years ago
7

The average July rainfall in a city is 7 inches , but the actual rainfall may vary by as much as 4 inches. What is the range , i

n inches , of the possible rainfall in July?
A) 3 < R < 7
B) 7 < R < 11
C) 3 < R < 11
( ALL ARE INCLUSIVE I just didn't have the sign for it )
Mathematics
2 answers:
Lady_Fox [76]3 years ago
8 0
The answer is C. (too lazy to explain how sorry)
Contact [7]3 years ago
3 0

Answer:

C. 3\leq R\leq 11

Step-by-step explanation:

Let R represent range, in inches, of the possible rainfall in July.

We have been given that the average July rainfall in a city is 7 inches , but the actual rainfall may vary by as much as 4 inches.

We will use tolerance formula to solve our given problem.

|\text{Actual}-\text{Ideal}|\leq\text{Tolerance}

|R-7|\leq4

Using absolute value rule |u|\leq a, then -a\leq u\leq a, we will get:

-4\leq R-7\leq4

-4+7\leq R-7+7\leq4+7

3\leq R\leq 11

Therefore, option C represents range, in inches, of the possible rainfall in July.

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