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Tcecarenko [31]
3 years ago
15

PLEASE HELP ITS MY TRIMESTER TEST MY MOM WILL KILL ME IF I FAIL! <3 WILL MARK BRAINLIST!

Mathematics
2 answers:
Mila [183]3 years ago
8 0

Answer:

a.  335.34 ft^2

Step-by-step explanation:

have a nice day! :)

Masteriza [31]3 years ago
3 0

Answer:

area = area \: of \: two \: semi \: circles + area \: of \: rectangle \\  = 2( \frac{1}{2} \pi {r}^{2} ) + (l \times w) \\  = 2( \frac{1}{2}  \times 3.14 \times  { (\frac{18}{2}) }^{2} ) + (18 \times 4.5) \\  = 254.47 + 81 \\  = 335.5 \:  {ft}^{2}

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kow [346]

Answer: 1 ) 20.58 cm^3

2 ) $0.09

3 ) $ 0.41

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
A 98% confidence interval for the mean of a population is to be constructed and must be accurate to within 0.3 unit. A prelimina
BaLLatris [955]

Answer:

n = (\frac{2.326*1.7}{0.3})^2= 173.73

And the value for n rounded up would be n = 174

Step-by-step explanation:

We have the following info given:

s= 1.7 previous estimation for the deviation

ME=0.03 the margin of error desired

Conf =0.98 represent the confidence

The Margin of error is given by:

ME = z_{\alpha/2} \frac{\sigma}{\sqrt{n}}

If we solve for the value of n we got:

n= (\frac{z*\sigma}{ME})^2

For this problem we know that the confidence is 98% so then the significance level would be \alpha=0.02 and the critical value would be:

z_{\alpha/2}= 2.326

And replacing we got:

n = (\frac{2.326*1.7}{0.3})^2= 173.73

And the value for n rounded up would be n = 174

3 0
3 years ago
If a plant manufacturing carpet backing has a cylindrical tank that is 3 meters high and is 6 meters in diameter, what is the vo
Alik [6]
The formula for the volume of a cylinder is \pi  r^{2} h

We know the diameter, so we can easily find the radius.  The diameter is twice as long as the radius, so we divide the diameter by 2 to find the radius.  This is equal to 6/2 = 3.  Now, we plug our numbers into the formula.

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This could also be written: 84.82  m^{3}

Both 27 pi cubic meters and 84.82 cubic meters are correct answers, so choose whichever one you think your teacher would prefer.
7 0
4 years ago
Read 2 more answers
Find m&lt;YQR pls need grade gud.​
DaniilM [7]

Answer:

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Step-by-step explanation:

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33 = 11x

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4 0
3 years ago
Express the sum in the simplest form.
olga nikolaevna [1]
The answer would be the third one because you cannot change the denominator and you can only add the numerators
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3 years ago
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