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VladimirAG [237]
3 years ago
10

How many 1/12pieces are in 3/3?

Mathematics
1 answer:
wel3 years ago
5 0

Answer:

plz ion know what is the awnser to mine

Step-by-step explanation:

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An educational psychologist wishes to know the mean number of words a third grader can read per minute.
Rama09 [41]

Answer: 208.

Step-by-step explanation:

The formula to find the minimum sample size is given by :-

n= (\dfrac{z^*\times \sigma}{E})^2                                    (1)

, where z* = critical z-value (two tailed).                                                                      

\sigma = Standard deviation ( from prior study ) and E = Margin of error.

As per given , we have

Margin of error : E= 0.29

Confidence level = 85%

Significance level =\alpha=1-0.85=0.15

Using z-table , the critical value (two -tailed)=z^*=z_{\alpha/2}=z_{0.15/2}=z_{0.075}=1.439

As per previous study , Variance =\sigma^2=8.41

\sigma=\sqrt{8.41}=2.9

Now, the required minimum sample size = n= (\dfrac{(1.439)\times (2.9)}{0.29})^2   [Substitute the values in formula (1)]

n=(14.39)^2

n=207.0721\approx208  [ Round to the next integer]

Hence, the minimum number of third graders that must be included in a sample = 208.

5 0
3 years ago
The length of a rectangle is x² + 6x + 3 and the width is 3x² + 4x - 2. Which expression represents the are of the rectangle
miss Akunina [59]

Answer:

Step-by-step explanation:

area of rectangle=length×width

=(x²+6x+3)×(3x²+4x-2)

=3x^4+(4+18)x³+(-2+24+9)x²+(-12+12)x-6

=3x^4+22x³+31x²-6

7 0
3 years ago
PLEASE HELP ASAP!!!!
zmey [24]

Answer:

no

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
A line passes through the point (-8 7) and has a slope of -5/4
SOVA2 [1]

Answer:

What is the question???

Step-by-step explanation:

3 0
3 years ago
a box contains 1 3/4 pounds of pancake mix. Jada used 7/8 pound for a recipe. What fraction of the pancake mix in the box did sh
ololo11 [35]

Answer:

Jada used 1/2 of the pancake mix in the box

Step-by-step explanation:

we know that

1\frac{3}{4}\ pounds -----> represent the 100% of the box

so

by proportion

Find what fraction represent \frac{7}{8}\ pounds

First convert mixed number to an improper fraction

1\frac{3}{4}\ pounds=\frac{1*3+4}{4}=\frac{7}{4}\ pounds

\frac{100}{(7/4)}=\frac{x}{(7/8)}\\ \\x= 100*(7/8)/(7/4)\\ \\x=50\%

Convert the percentage into fraction

50\%=50/100=1/2

6 0
3 years ago
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