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RideAnS [48]
3 years ago
15

The median of the data set is 18 what number is missing 12,17,21,13,25

Mathematics
2 answers:
natima [27]3 years ago
7 0

Answer:

19! Hope i helped~ xx

Step-by-step explanation:

marta [7]3 years ago
5 0

Answer:

19

Step-by-step explanation:

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A new video game is expected to sell 130 copies the first hour at a local game store. After that, the sales will follow the func
suter [353]
The answer is A I believe. 

At hour 1, the equation must equal 130,

therefore s(1) = 9(1-1) + 130
                s(1) = 9(0) + 130
                s(1) = 130

then so on when 
s(2) = 9(2-1) + 130
s(2) = 139

4 0
3 years ago
Read 2 more answers
Tracy works 20 hours a week at the bowling alley and makes $8.55 an hour. She gets a raise of $1.30 an hour. Approximately how m
NeTakaya
20 x 8.55= 171 that is what tracy was making per week.
8.55 + 1.30= 9.85 is her raise
20 x 9.85= 197 is how much she making with her new raise per week.
now to figure out how much MORE she is making go 197 - 171=$26 is your final answer

8 0
3 years ago
PLEASE HELP WITH THIS ONE QUESTION
Nana76 [90]

Answer:

I'm not sure about the factors, but it's reflected over the x axis if they helps narrow it down

3 0
2 years ago
Each batch of 24 cookies needs 2.25 cups of flour. If Stacy and her mom bake 3.5 batches, how much flour is
Vikentia [17]

Answer:

7 7/8 cups of flour

Step-by-step explanation:

2.25 times 3.5 equals 7.875

4 0
2 years ago
A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys
Luba_88 [7]

Answer:

z=-1.28

And if we solve for a we got

a=470 -1.28*60=393.2

So the value of height that separates the bottom 10% (Fastest 10%) of data from the top 90% is 393.2.

so if the time is 393.2 or lower a boy would earn a certificate of recognition from the fitness association

Step-by-step explanation:

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".  

Solution to the problem

Let X the random variable that represent the time for this event of a population, and for this case we know the distribution for X is given by:

X \sim N(470,60)  

Where \mu=470 and \sigma=60

NOTE: For this case the fastest 10% is on the lower tail of the distribution

For this part we want to find a value a, such that we satisfy this condition:

P(X>a)=0.9   (a)

P(X   (b)

Both conditions are equivalent on this case. We can use the z score again in order to find the value a.  

As we can see on the figure attached the z value that satisfy the condition with 0.1 of the area on the left and 0.9 of the area on the right it's z=-1.28. On this case P(Z<-1.28)=0.1 and P(z>-1.28)=0.9

If we use condition (b) from previous we have this:

P(X  

P(z

But we know which value of z satisfy the previous equation so then we can do this:

z=-1.28

And if we solve for a we got

a=470 -1.28*60=393.2

So the value of height that separates the bottom 10% (Fastest 10%) of data from the top 90% is 393.2.

so if the time is 393.2 or lower a boy would  earn a certificate of recognition from the fitness association

4 0
3 years ago
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