4 years ago

I need helpppppppp!!!

Mathematics

1 answer:

yarga [219]4 years ago

3 0

Answer: i would say probably 3 or -3

I hope it helps

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The ages of trees in a forest are normally distributed with a mean of 25 years and a standard deviation of 4. Approximately what

harkovskaia [24]

Answer:

78.88%

Step-by-step explanation:

We have been given that

$\mu=25,\sigma=4,x_1=20,x_2=30$

The z-score formula is given by

$z-\text{score}=\frac{x-\mu}{\sigma}$

For $x_1=20$

$z_1=\frac{20-25}{4}\\\\z_1=-1.25$

For $x_2=30$

$z_2=\frac{30-25}{4}\\\\z_2=1.25$

Now, we find the corresponding probability from the standard z score table.

For the z score -1.25, we have the probability 0.1056

For the z score 1.25, we have the probability 0.8944

Therefore, the percent of the trees that are between 20 and 30 years old is given by

0.8944 - 0.1056

= 0.7888

=78.88%

6 0

4 years ago

Read 2 more answers

What is the measure of angle w°? Show all work.

Korolek [52]

It’s 100 I’m pretty sure

3 0

3 years ago

Which of the following sets of ordered pairs represents a function?

allsm [11]

Answer:
A

Hope i helped :)

8 0

3 years ago

I can do your exams and quizzes if you need an A!

cluponka [151]

pool I would like that, I love u dude

8 0

3 years ago

Find f(3) given that f(3) = -x^4 + 3x^3 + x^2 - 8x - 16.

Hitman42 [59]

Answer: -31

<u>Step-by-step explanation:</u>

f(x) = -x⁴ + 3x³ + x² - 8x - 16

f(3) = -(3)⁴ + 3(3)³ + (3)² - 8(3) - 16

= -81 + 81 + 9 - 24 - 16

= -31

6 0

3 years ago