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3 years ago

If you dive to the ocean floor would it be

Mathematics

2 answers:

irga5000 [103]3 years ago

7 0

It depends on if the ocean floor is cold or warm or freezing maybe below 0°

Cerrena [4.2K]3 years ago

3 0

Hi there! :) I believe it would be negative because you are going down. But I am not sure because you didn't a lot of information.

Hope I helped! :)

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If nobody answers me imma just die <br> Cause I know I’m nothing cause nobody will help

inna [77]

Answer:

when reflected across the y-axis the points will reflect onto the other side on the y-axis.

when reflected over the x-axis the points with reflect onto the x-axis

3 0

3 years ago

The random variable x has the following probability distribution: x f(x) 0 .25 1 .20 2 .15 3 .30 4 .10 a. Is this probability di

Reptile [31]

Answer and Explanation:

Given : The random variable x has the following probability distribution.

To find :

a. Is this probability distribution valid? Explain and list the requirements for a valid probability distribution.

b. Calculate the expected value of x.

c. Calculate the variance of x.

d. Calculate the standard deviation of x.

Solution :

First we create the table as per requirements,

x P(x) xP(x) x² x²P(x)

0 0.25 0 0 0

1 0.20 0.20 1 0.20

2 0.15 0.3 4 0.6

3 0.30 0.9 9 2.7

4 0.10 0.4 16 1.6

∑P(x)=1 ∑xP(x)=1.8 ∑x²P(x)=5.1

a) To determine that table shows a probability distribution we add up all five probabilities if the sum is 1 then it is a valid distribution.

$\sum P(X)=0.25+0.20+0.15+0.30+0.10$

$\sum P(X)=1$

Yes it is a probability distribution.

b) The expected value of x is defined as

$E(x)=\sum xP(x)=1.8$

c) The variance of x is defined as

$V=\sum x^2P(x)-(\sum xP(x))^2\\V=5.1-(1.8)^2\\V=5.1-3.24\\V=1.86$

d) The standard deviation of x is defined as

$\sigma=\sqrt{V}$

$\sigma=\sqrt{1.86}$

$\sigma=1.136$

5 0

3 years ago

After a 32% discount is applied, you purchase a new phone case for $51.20. What was the price before the sale?

cupoosta [38]

Answer:

$67.70

Step-by-step explanation:

Multiply 51.20 by 0.32 then add that to 51.20

8 0

3 years ago

Part Sophia's brother, Stanley, is cooking carrots for the family dinner. He needs to make less than twice as many servings of c

Masteriza [31]

Answer:

Step-by-step explanation:

Twice the serving of mashed potatoes is 2 x 10 = 20

If y is the number then y < 20

7 0

3 years ago

(1+cos2x)/(1-cos2x) = cot^2x

sesenic [268]

We will turn the left side into the right side.

$\dfrac{1 + \cos 2x}{1 - \cos2x} = \cot^2 x$

Use the identity:

$\cos 2x = \cos^2 x - \sin^2 x$

$\dfrac{1 + \cos^2 x - \sin^2 x}{1 - ( \cos^2 x - \sin^2 x)} = \cot^2 x$

$\dfrac{1 - \sin^2 x + \cos^2 x }{1 - \cos^2 x + \sin^2 x} = \cot^2 x$

Now use the identity

$\sin^2 x + \cos^2 x = 1$ solved for sin^2 x and for cos^2 x.

$\dfrac{\cos^2 x + \cos^2 x }{\sin^2 x + \sin^2 x} = \cot^2 x$

$\dfrac{2\cos^2 x}{2\sin^2 x} = \cot^2 x$

$\dfrac{\cos^2 x}{\sin^2 x} = \cot^2 x$

$\cot^2 x = \cot^2 x$

8 0

3 years ago