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nikdorinn [45]
3 years ago
11

What number is 22% if 320

Mathematics
1 answer:
sergeinik [125]3 years ago
8 0
The answer is 0.22*320= 70.4
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Assuming a 90% confidence level, the margin of error is approximately?
elena-s [515]

Answer:

  0.3

Step-by-step explanation:

The margin of error is calculated as ...

  (standard deviation)/√(sample size) × (z*-score)

where the z*-score is chosen based on the desired confidence level.

Here, you have ...

  • standard deviation = 2.7
  • √(sample size) = √225 = 15
  • z*-score for 90% confidence level = 1.645

Putting these values in the above expression for margin of error gives ...

  2.7/15·1.645 = 0.2961 ≈ 0.3

7 0
3 years ago
Terry wants to tip 15% to the waiter at a restaurant this means he will multiply the cost by 0.15 if this meal costs 18.10 how m
Katen [24]

just as the problem states, multiply the cost (18.10) by 0.15

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7 0
2 years ago
How do you solve x-y=1 ; x+y=3. Please Explain
KIM [24]
You isolate one variable. Let's say that x will be that variable in the first equation:
x-y=1
 +y  +y
x=y+1
So now you have the equation for x.  All you have to do is substitute it into the other:
x=y+1
(y+1)+y=3
Combine like terms and solve:
2y+1=3
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2y=2
2y/2=2/2
y=1
Now that you have the value of one, substitute it into either of the equations to find x.
If you put it in the first:
x-1=1
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x=2
If you put it into the other, you would get the same answer.
Therefore, y=1 and x=2
8 0
3 years ago
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mariarad [96]

Answer:

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Step-by-step explanation:

hduhdhdhdhdjdndkdmd

djdmdncncnc

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6 0
3 years ago
Someone please help me on this math question
puteri [66]

Answer:

Its a 22.5     Because of the 3-4-5 triangle

Step-by-step explanation:

5 0
3 years ago
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