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2 years ago

Which of the following is not a possible r-value? A.0.3 B.-0.3 C.-1.6 D.0.6

Mathematics

2 answers:

sveta [45]2 years ago

8 0

|r| ≤ 1
selection C cannot be a value of r.

aliya0001 [1]2 years ago

5 0

Answer:

option C $-1.6$

Step-by-step explanation:

we know that

The <u>correlation coefficient</u> r is used in statistics to measure how strong a relationship is between two variables. The value of r is always between $+1$ and $-1$

The value of $-1.6$ is not a possible r-value

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Read 2 more answers

a rectangular lawn has an area of a^3 - 125. use the difference of cubes to find out the dimensions of the rectangle.

ANEK [815]

The area of a rectangle is the product of its dimensions

The dimensions of the rectangle are: $\mathbf{Length = a -5}$ and $\mathbf{Width = a^2 + 5a + 25}$

The area is given as:

$\mathbf{Area = a^3 - 125}$

Express 125 as 5^3

$\mathbf{Area = a^3 - 5^3}$

Apply difference of cubes

$\mathbf{Area = (a - 5)(a^2 + 5a + 5^2)}$

$\mathbf{Area = (a - 5)(a^2 + 5a + 25)}$

The area of a rectangle is:

$\mathbf{Area = Length \times Width}$

So, by comparison:

$\mathbf{Length = a -5}$

$\mathbf{Width = a^2 + 5a + 25}$