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2 years ago

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Mathematics

1 answer:

AleksandrR [38]2 years ago

6 0

I think it’s 10 bc the number of packs of batteries

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50 more than ___ is 64.

Sloan [31]

50 more than 14 is 64

14 + 50 = 64

Hope this helps

-AaronWiseIsBae

6 0

4 years ago

Read 2 more answers

A population of values has a normal distribution with μ = 247 and σ = 62.2. You intend to draw a random sample of size n = 16. (

nadya68 [22]

Answer:

a) $z = \frac{295.2-247}{62.2}=0.772$

And using the normal distribution table or excel we got:

$P(Z>0.772) = 1-P(Z$

b) $z = \frac{295.5 -247}{\frac{62.2}{\sqrt{16}}}= 3.119$

And we can use the normal standard table or excel in order to find the probability and we got:

$P(z>3.119) =1-P(Z$

Step-by-step explanation:

For this case we know that the random variable of interest is normally distributed with the following parameters:

$X \sim N (\mu = 247, \sigma =62.2)$

Part a

We want to find this probability:

$P(X>295.2)$

And we can use the z score formula given by:

$z = \frac{X-\mu}{\sigma}$

Replacing we got:

$z = \frac{295.2-247}{62.2}=0.772$

And using the normal distribution table or excel we got:

$P(Z>0.772) = 1-P(Z$

Part b

We select a random sample of size n = 16 and we try to find this probability:

$P(\bar X >295.2)$

And we can use the z score formula given by:

$z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

And replacing we got:

$z = \frac{295.5 -247}{\frac{62.2}{\sqrt{16}}}= 3.119$

And we can use the normal standard table or excel in order to find the probability and we got:

$P(z>3.119) =1-P(Z$

8 0

3 years ago

a laboratory technician needs to make a 40-liter batch of a 40% acid solution. How can the laboratory technician combine a batch

Anettt [7]

The answers comes to be for every 1 unit of pure acid (100%) add three units of 20% and you get the desired 40%

so if you need 40 L (i don't know what container sizes there are so i can't give you an exact amount just add 1 part 100% acid and 3 parts 20% acid) <span />

7 0

3 years ago

292 students each get 10 ounces. How many ounces are needed?

sasho [114]

Answer:

2,920 ounces

Step-by-step explanation:

To find this, just multiply:

292 × 10 = 2,920

So, 2,920 ounces are needed

Hope this helps :)

7 0

3 years ago

Callie has 268 beads she wants to make 9 identical bracelets for her craft sale. She wants to use as many beads as possible on e

Charra [1.4K]

Answer:29 beads per 108$

Step-by-step explanation:use multiplication you would do the beads divided by the amount. Did you find the price you would do the amount of bracelets * 12.

5 0

3 years ago