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3 years ago

3a b2 b3 4b2 4 5a what is the answer

1 answer:

7 0

Is there a piece of paper that comes with the questions? Or do I just pick one? If there is a piece of paper attached, please add it to your question. Thank you!

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Circle O has a circumference of approximately 28.3 cm. Circle O with radius r is shown. What is the approximate length of the ra

Marrrta [24]

Answer:

4.5cm

Step-by-step explanation:

Circumference = 2 $\pi$ r

28.3=2 $\pi$ r

28.3/2 $\pi$ =r

4.456

7 0

3 years ago

Combine the like terms to create an equivalent -3х – 6+(-1)

pishuonlain [190]

You can combine the -6 and -1 to -7. So the expression can be simplified as -3x-7

4 0

3 years ago

*PLEASE ANSWER* Which of the following is not a step in finding the area of an unknown figure? a.) Expand the figure and stretch

Fittoniya [83]

Answer:

Step-by-step explanation:

6 0

3 years ago

One variable examined is the survival rate 10 years after tagging. The scientists observed that 10 of the 50 metal tagged pengui

Oksana_A [137]

Answer: 90% confidence interval would be $(-0.2483,-0.0717)$

Step-by-step explanation:

Since we have given that

n₁ = 50

Number of metal tagged penguins survived = 10

So, $p_m=\dfrac{10}{50}=0.2$

n₂ = 50

Number of electronic tagged penguins = 18

So, $p_e=\dfrac{18}{50}=0.36$

So, at 90% confidence interval, z = 1.28

So, interval would be

$(p_m-p_e)\pm z\sqrt{\dfrac{p_m(1-p_m)}{n}+\dfrac{p_e(1-p_e)}{n}}\\\\=(0.2-0.36)\pm 1.28\sqrt{\dfrac{0.2\times 0.8}{50}+\dfrac{0.36\times 0.64}{50}}\\\\=-0.16\pm 0.0883\\\\=(-0.16-0.0883,-0.16+0.0883)\\\\=(-0.2483,-0.0717)$

Hence, 90% confidence interval would be

$(-0.2483,-0.0717)$

6 0

3 years ago

Pearson<br> 27. --9-(-11)<br> 0

Nonamiya [84]

Answer:

i dont know

Step-by-step explanation:

4 0

2 years ago