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3 years ago

70% of a number is what fraction of that number?

Mathematics

1 answer:

sdas [7]3 years ago

4 0

Answer:

7/10

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A company interested in lumbering rights for a certain tract of slash pine trees is told that the mean diameter of these trees i

brilliants [131]

Answer:

97.6% of the trees will have diameters between 7.6 and 18.6 inches.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 12 inches

Standard Deviation, σ = 2.2 inches

We are given that the distribution of diameter of tree is a mound shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

P(diameters between 7.6 and 18.6 inches)

$P(7.6 \leq x \leq 18.6) = P(\displaystyle\frac{7.6 - 12}{2.2} \leq z \leq \displaystyle\frac{18.6-12}{2.2}) = P(-2 \leq z \leq 3)\\\\= P(z \leq 3) - P(z < -2)\\= 0.999 - 0.023 = 0.976= 97.6\%$

$P(7.6 \leq x \leq 18.6) = 97.6\%$

97.6% of the trees will have diameters between 7.6 and 18.6 inches.

8 0

3 years ago

Please please please help!!25points

katrin [286]

Answer:

If you could please write it down i will solve it for you.

Step-by-step explanation:

8 0

3 years ago

Choose the correct answer.

antiseptic1488 [7]

Answer:

option 2. 9.3+b=14.5

Step-by-step explanation:

I hope that the answer is clear

8 0

3 years ago

Simplify these expressions a) 5x +3x + 2y + 4y b) 6x - 2x + 8y - 6y

cestrela7 [59]

Answer:

$a) \: 5x + 3x + 2y + 4y \\ = 8x + 6y$

$b) \: 6x - 2x + 8y - 6y \\ = 4x + 2y$

I hope I helped you^_^

3 0

3 years ago

Slove equations with variables on both sides9 + 3f = 2f

Vera_Pavlovna [14]

Given 9 + 3f = 2f

9 = 2f - 3f

9 = -f

f = -9

4 0

1 year ago