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jasenka [17]
3 years ago
15

What is the area of the square

Mathematics
1 answer:
alexdok [17]3 years ago
6 0

Answer:

T

Step-by-step explanation:

(x-10)^2=(x-10)(x-10)=(x^2-10x-10x+100)=x^2-20x+100

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9.4 The heights of a random sample of 50 college stu- dents showed a mean of 174.5 centimeters and a stan- dard deviation of 6.9
gladu [14]

Answer:  a) (176.76,172.24), b) 0.976.

Step-by-step explanation:

Since we have given that

Mean height  = 174.5 cm

Standard deviation = 6.9 cm

n = 50

we need to find the 98% confidence interval.

So, z = 2.326

(a) Construct a 98% confidence interval for the mean height of all college students.

x\pm z\times \dfrac{\sigma}{\sqrt{n}}\\\\=(174.5\pm 2.326\times \dfrac{6.9}{\sqrt{50}})\\\\=(174.5+2.26,174.5-2.26)\\\\=(176.76,172.24)

(b) What can we assert with 98% confidence about the possible size of our error if we estimate the mean height of all college students to be 174.5 centime- ters?

Error would be

\dfrac{\sigma}{\sqrt{n}}\\\\=\dfrac{6.9}{\sqrt{50}}\\\\=0.976

Hence, a) (176.76,172.24), b) 0.976.

8 0
3 years ago
HELP ME PLEASE!! Word problem, what's wrong? explain.
dmitriy555 [2]

Answer:

She made a mistake in Step 7.

Step-by-step explanation:

Step 1 through 6 are correct. Only from Step 6 to Step 7 the problem comes in: both sides of the equation are multiplied by x, however the x on the left side, by error, becomes 1. The correct state in Step 7 should look like this:

x(\frac{1}{2}P-x)=256

8 0
3 years ago
a regular polygon has a perimeter of 36 inches. each side is exactly 6 inches long. which figure does this discribe?
fgiga [73]
Since a side is only 6 inches long and the total perimeter is 36; take 36/6 and you get 6. The only figure with six sides is a hexagon, thus your answer is hexagon.
3 0
3 years ago
jake is younger than sophie. sophie is 14 years old. write an inequality that compares jakes age in years, j, to sophies age
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The answer would be j<14
Because Sophie is 14 and hake is any number younger then her
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3 years ago
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A certain game and fun center charges a fee to rent the party room for birthday parties plus an additional fee per guest. The gr
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i Believe c

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3 years ago
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