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nalin [4]
3 years ago
7

D. 9.9 Math question please show work

Mathematics
1 answer:
34kurt3 years ago
5 0
The ans is B
hope this helps

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A quality-control inspector is testing a batch of printed circuit boards to see wheater they are capable of performing in a high
avanturin [10]

Answer:

see explaination

Step-by-step explanation:

Here the null hypothesis is that the PCB survives against the alternate that the PCB 'does not survive'. The test says that the PCB will survice if it is classified as 'good'; or, it will not survive if it is classifies as 'bad'.

a. The Type II error is the error committed when a PCB which cannot actually survive is classified as 'good'.

b. Therefore P(Type II error) = P(The PCB is classified as 'good' | PCB does not survives) = 0.03.

6 0
3 years ago
Which of the following is a correct interpretation of the expression 3 - (-5)?<br> Chanc 1 answer.
Juliette [100K]

Answer:

8

Step-by-step explanation:

3 - (-5)

This can be rewitten to

3 + 5

Why?

2 negatives cancel each other out to make a positive, therefore:

3 + 5 = 8 or 3 - (-5) = 8

5 0
2 years ago
Read 2 more answers
The height that a ball bounces varies directly with the height from which it is dropped. A certain ball bounces 30 cm when dropp
Akimi4 [234]

The ball will bounce 72 cm high if dropped from a height of 120 cm

<u>Solution:</u>

Given, The height that a ball bounces varies directly with the height from which it is dropped.  

A certain ball bounces 30 cm when dropped from a height of 50 cm.  

We have to find how high will the ball bounce if dropped from a height of 120 cm?

Now, according to given information,

When dropped from 50 cm ⇒ bounces 30 cm

Then, when dropped from 120 cm ⇒ bounces "n"  cm

Now by Chris cross method, we get,

\begin{array}{l}{n \times 50=30 \times 120} \\\\ {\rightarrow n=\frac{30 \times 120}{50}} \\\\ {\rightarrow n=\frac{3600}{50}} \\\\ {\rightarrow n=72}\end{array}

Hence, the ball bounces 72 cm high.

5 0
3 years ago
6. A square field has an area of 479 ft². What is the approximate length of a side of the field?
anastassius [24]

Answer:

22 Feet

Step-by-step explanation:

All the lengths of a square are the same length.  

The area of a square is the length times the width.  The length and the width are the same measurement.  So, we are looking for the square root of 479.

\sqrt{479}

21.88606863 is as far as my calculator goes.  This is an irrational number.  That means that it never repeats or terminates as a decimal.  They tell us to answer to the nearest foot.  That would be 22 feet.

3 0
1 year ago
$11.49 for 3 packages
Phoenix [80]
I do not understand your question could you please be more descriptive
4 0
3 years ago
Read 2 more answers
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