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Sedaia [141]
3 years ago
8

What happens if you fail one semester in 8th grade?

Mathematics
1 answer:
Hoochie [10]3 years ago
7 0

Answer:

youll be fine ididnt pass and im now in 10th

\

Step-by-step explanation:

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Find the value of x?
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I believe your answer is 145
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3 years ago
Bill is 6 ft tall. He casts a 4 ft shậadow. At the same time, a tree casts a 16 ft shadow. How tall is the
Hatshy [7]

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the height of the tree is 24.

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What is 0.2401 as a fraction
vlabodo [156]

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24/100 or 6/25

Step-by-step explanation:

.24 is the same as 24/100 if you need to simplify then just find a common number to divide by.


Hope this helps! Please mark Brainliest! Have a great day!



Thank you for using Brainly!

3 0
3 years ago
Read 2 more answers
A statistician selected a random sample of 125 observations from a population with a known standard deviation equal to 16 and co
serious [3.7K]

Answer:

Step-by-step explanation:

Given that a statistician selected a random sample of 125 observations from a population with a known standard deviation equal to 16 and computed a sample mean equal to 77

We can use Z critical values since population std deviation is known. Also sample size >30

We find std error of mean = \frac{16}{\sqrt{125} } \\=1.4311

Margin of error = Z critical value * 1.4311

Z critical values for 93% = 1.81

for 89% = 1.60

n Std error Z critical  Conf interval  

            89%    

     

125 1.4311     1.6  (74.71024 79.28976 )

     

     

          93%    

            1.81  (74.409709 79.590291 )

We find that when confidence level increases interval width increses.

c) When sigma changes to 441, std error changes to \frac{16}{\sqrt{441} } \\=0.7619

So we get

n Std error Z critical  Conf interval  

           89%    

     

441  0.7619     1.6  (75.781 78.219 )

     

     

         93%    

           1.81  (75.621 78.37904)

d) When n = 625, std error changes to 16/25 = 0.64

n Std error Z critical  Conf interval  

        89%    

     

441 0.64 1.6        (75.976 78.024 )

     

     

       93%    

        1.81      (75.842 78.1584)

When sample size increases, confidence interval width decreases.

8 0
3 years ago
Determine two pairs of polar coordinates for the point (4, -4) with 0° ≤ θ < 360°.
Ray Of Light [21]

Answer:

D

Step-by-step explanation:

4=r cos \theta\\-4=r sin \theta\\square ~and~add\\16+16=r^2(cos^2 \theta+sin^2\theta)\\r^2=32\\ r=4\sqrt{2} \\divide \\tan \theta=-1\\as x is positive ,y is negative ,so \theta lies in 4th quadrant.\\tan \theta=-1=-tan 45=tan(360-45)=tan 315\\\theta=315°\\\\co-ordinates~ are~(r,theta) ~or~(-r,\theta+ -180°)\\hence ~co-ordinates~are(4\sqrt{2} ,315°),(-4\sqrt{2} ,135°)

7 0
3 years ago
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