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Dmitrij [34]
3 years ago
13

Suppose the life of a particular brand of calculator battery is approximately normally distributed with a mean of 75 hours and a

standard deviation of 10 hours. If the manufacturer of the battery is able to reduce the standard deviation of battery life from 10 to 9 hours, what would be the probability that 16 batteries randomly sampled from the population will have a sample mean life of between 70 and 80 hours
Mathematics
1 answer:
Orlov [11]3 years ago
3 0

Answer:

idek

Step-by-step explanation:

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A tissue is 6 inches long the area is 24 in.² what is the width of the tissue
raketka [301]

Answer:

4 In.

Step-by-step explanation:

If you 24 divided by 6 you would get 4. The equation to find area is L x W (length x Width). You're missing the width so you would just start from the area divided by length.

4 0
3 years ago
Given the diameter of a circle is 17 1/2cm, find its area (use π = 22/7)​
vladimir2022 [97]

Answer:

240.625 is full value. you can use sigfigs if you need.

Area is (pi)(r)^2 so (22/7)(8.75)^2

half diameter is radius

6 0
3 years ago
if a store uses a selling price based markup of 40% and an item cost the store $300 what selling price would the store set for t
kirza4 [7]

Answer:

The selling price would be $420.

Step-by-step explanation:

In order to find the mark up, we need to multiply the amount it originally costs by the percentage it is being marked up.

$300 * 40% = $120

Now that we have the mark up amount, we add it to the original cost to get the sale price.

$300 + $120 = $420

6 0
3 years ago
What is the net force on this object? Small box with dot in the middle. Arrows originate at dot. Arrow up and Arrow down are sam
Dima020 [189]
Only 2 forces are out of balance - the 22N and the 14N 
So the resultant force is 22-14 = 8N.
7 0
3 years ago
Read 2 more answers
Li is making beaded necklaces for each necklace, she uses 27 spacers, plus 5 beads per inch of necklace length. Write an equatio
brilliants [131]
Given that <span>Li is making beaded necklaces for each necklace, she uses 27 spacers, plus 5 beads per inch of necklace length.

The equation to find how many beads Li needs for each necklace can be obtained as follows:

A. The input variable is the number of inches of the necklace length (x).

B. The output variable is the number of beads Li needs for each necklace (y).

C. The required equation is given by

y = 5x</span>
6 0
3 years ago
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