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nexus9112 [7]
2 years ago
13

Plz help!!! If the prices of oranges this week is 2.89

Mathematics
1 answer:
ladessa [460]2 years ago
4 0

Answer:

I think it would be B but i'm not 100% sure

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celebrity a has 400 followers on social media and is gaining 75 followers each day. celebrity b has 1000 followers on social med
Aleksandr [31]

Answer:

It will take 12 days and they will be at 700 followers each

Step-by-step explanation:

Just guess and keep adding.

8 0
3 years ago
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Researchers at a pharmaceutical company have found that the effective time duration of a safe dosage of pain relief drug is norm
FrozenT [24]

Answer:

a) P(1

b) P(X

Step-by-step explanation:

1) Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

2) Part a

Let X the random variable that represent the duration of a safe dosage of pain relief drug, and for this case we know the distribution for X is given by:

X \sim N(1.5,0.8)  

Where \mu=1.5 and \sigma=0.8

We are interested on this probability

P(1

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(1

And we can find this probability on this way:

P(-0.625

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(-0.625

3) Part b

We are interested on this probability

P(X

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(X

And we can find this probability on this way:

P(z

6 0
3 years ago
Each floor at a building is 13.6 feet tall the building is 108.8 tall. how many floors are there?
Darina [25.2K]
108.8 feet in total divided by 13.6 feet for each floor = 8 floors
8 0
3 years ago
Read 2 more answers
15% of the apples in a crate are rotten. There are 12 rotten apples in the crate.
ladessa [460]
12/80
=15 percent

There are 80 apples in the crate

Do 12 divided by 15 then multiply by 100 = 80
4 0
3 years ago
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En una sala de teatro havian 7 filas 23 sillas cada una acaban de quitar 8 de las sillas ¿cuantas sillas quedan?
LenaWriter [7]

Answer:

Quedan 153 sillas

Step-by-step explanation:

Primero sabemos que en una sala de teatro tenían 7 filas, y en cada una de esas filas habían 23 sillas.

Entonces, originalmente, el número total de sillas es 7 veces 23:

S = 7*23 = 161

Luego sabemos que quitan 8 de esas sillas, entonces el número de sillas que quedan es la diferencia entre el número original de sillas, 161, y 8, que nos da:

S = 161 - 8 = 153

Quedan 153 sillas

6 0
2 years ago
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