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alexandr402 [8]
3 years ago
13

A bird was perched on a tree at a height of 19 feet. The bird then saw food on a branch below and dropped down 7 1/2 feet. What

is the current height of the bird?
Mathematics
2 answers:
solmaris [256]3 years ago
8 0

Answer:

11 1/2 feet

Step-by-step explanation:

You simply subtract 19 and 7 1/2 because the bird dropped down which means it is closer to the ground, therefore, subtracting its original height at 19 feet. Hope that helped.

Anuta_ua [19.1K]3 years ago
7 0

Answer:

19-7.5 = 11.5 or 11 and 1/2 or 23/2

:)

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Answer: (1500.66,1599.34)

Step-by-step explanation:

Confidence interval for population mean:

\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}

,where \overline{x} = Sample mean , n= Sample size, z* = critical two tailed z-value , \sigma = population standard deviation.

As per given , we have

n= 16

\sigma = 154 square feet

\overline{x}= 1550 square feet

\alpha= 1-0.80 = 0.20

Critical z-value = z_{\alpha/2}=z_{0.2/2}=z_{0.1}=1.2815

Confidence interval for population mean:

1550\pm (1.2815)\dfrac{154}{\sqrt{16}}\\\\ = 1550\pm (1.2815)\dfrac{154}{4}\\\\= 1550\pm 49.33775\\\\ =(1550-49.33775,\ 1550+49.33775)\\\\\approx (1500.66,\ 1599.34)

Required confidence interval:  (1500.66,1599.34)

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BlackZzzverrR [31]
23. f(2)= 1.46
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Step-by-step explanation:

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