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3 years ago

The probability of a new washing machine working perfectly is 0.972

Mathematics

1 answer:

kozerog [31]3 years ago

7 0

Answer:

0.028

Step-by-step explanation:

The equation for opposite probabilities is 1 - P(A)

This means 1 minus the probability of event A which in this question is the event of the washing machine working properly.

So to find the chance that it will not work properly:

1 - 0.972 =0.028

I hope this helped!

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HURRY WILL GIVE BRAINLEST

Anettt [7]

Answer:

The point is located at (0,7) is correct

The point is on the y-axis. is correct

Step-by-step explanation:

The point is located at (7,0). is wrong because first the x values comes and then y values come here the x value is 0 and y value is 7

The point is on the x-axis.this is also wrong as you can see that the point lies on y axis not x axis

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3 years ago

I need the answers to the fill in bubbles.

DochEvi [55]

System A: The system has exactly one solution (3,1)
System B: No Solution
System C: Infinite many solutions

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3 years ago

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What is (t)? 0=18000*0.988^t

lutik1710 [3]

0=1. The answer is No Solution.

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3 years ago

The average height of students at UH from an SRS of 12 students gave a standard deviation of 2.5 feet. Construct a 95% confidenc

Vanyuwa [196]

Answer:

c. [1.771;4.245] feet

Step-by-step explanation:

Hello!

The variable of interest is

X: height of a student at UH

X~N(μ;σ²)

You have to estimate the population standard deviation using a 95% confidence interval.

The statistic to use for the interval is a student Chi-Square with n-1 degrees of freedom. First you have to calculate the CI for the population variance:

$[\frac{(n-1)S^2}{X^2_{n-1;1-\alpha /2}} ;\frac{(n-1)S^2}{X^2_{n-1;\alpha /2}} ]$

$X^2_{n-1;1-\alpha /2}= X^2_{11;0.975}= 21.920$

$X^2_{n-1;\alpha /2}= X^2_{11;0.025}= 3.816$

n=12

S= 2.5

$[\frac{11*6.25}{21.920} ;\frac{11*6.25}{3.816}} ]$

[3.136; 18.016] feet²

Then you calculate the square root of both limits to get the CI for the population standard deviation:

[√3.136; √18.016]

[1.771;4.245] feet

I hope this helps!

4 0

3 years ago

vector w has magnitude 25.0 and direction angle 41.7 degrees. Calculate the horizontal and vertical components of w

11Alexandr11 [23.1K]

Consider the attached picture. It represents a vector, centered in the origin with angle 41.7 degrees, and a circumference with radius 25, centered in the origin.

As you can see, the horizontal and vertical components of the vector correspond to the lengths of segments OD and OC, respectively.

You might recognize this scenario from you trigonometry class: if the circle had radius 1, we would have

$OD=\cos(41.7),\quad OC=\sin(41.7)$

Since the circle has radius 25, we have to scale those coordinates:

$OD=25\cos(41.7),\quad OC=25\sin(41.7)$

5 0

3 years ago