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Rudiy27
4 years ago
6

A factory that manufactures screws is performing a quality control experiment. Each object should have a length of no more than

19 centimeters. The factory believes that the length of the screws exceeds this value and measures the length of 65 screws. The sample mean screw length was 19.04 centimeters. The population standard deviation is known is known to be 0.19 centimeters. What is the null hypothesis and what is the alternative hypothesis?
Mathematics
1 answer:
atroni [7]4 years ago
5 0

Answer:

Step-by-step explanation:

Ok

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2) Does this mapping diagram represent a function? *
Paul [167]

Answer:

yes

Step-by-step explanation:

each input is put with only one output therefore it is a function

8 0
3 years ago
No matter which natural number "n" that you choose, explain why the following statement can never be true:
maria [59]
First of all, 2^n and 3^n are exponentials with different bases, and thus their sum cannot be simplified beyond 2^n + 3^n.  In other words, these two functions cannot be combined ino one function (such as 4^n).

You may gain much more insight by graphing 2^n, 3^n and 4^n to determine whether there is truth in the given statement or not.

3 0
3 years ago
What is 90% of 45?????
geniusboy [140]

Answer:

40.5

Step-by-step explanation:

i would recommend changing the 90% into a decimal

90% ⇒  .90

then now you can just multiply .90x45

.90x45=40.5

7 0
2 years ago
Read 2 more answers
A bacteria population is going exponentially with a growth factor of 1/6 each hour. By what growth factor does the population ch
solong [7]

Answer:

The bacteria population will change with a growth factor of 1/12 for every half an hour or 1/12 per 30 minutes. (I don't know what the options are, but anything related to the answer I gave should be right.)

Step-by-step explanation:

Simple mathematics should get you the right answer. Here we are dealing with a fraction in a fraction. The first scenario should look like this: <u>1/6 / 1</u>. Basically, that looks like one-sixth over one. Obviously, if we divide 1/6 by 1, we would get 1/6 itself again and we want to know what growth factor the population changes by for every half an hour. There are <u>30 minutes</u> in half an hour and <u>60 minutes</u> in one hour. Let's use the simplified terms to our advantage. Now, our first scenario should look like this: <u>1/6 / 60</u>. Looks better now doesn't it? (Check the linked image to see the full scenario and how I did it in this next part.) For me, I divided 60 by 30 to get the scale factor, which is 2, then I divide 2 by 1/6 to get 1/12. Finally, we have 1/12 per half an hour! If I am wrong, please let me know and I hope this helps! :D

3 0
3 years ago
Simple fill in the blank and example.
Vesnalui [34]
1. a(x+b)
2. ax+ab

example:
2(x+3)
=2.x + 2.3
=2x + 6
3 0
3 years ago
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