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2 years ago

8

In a survey of 1200 teenagers, 48% said they are involved in an extracurricular activity. What is the margin of error for the su

rvey

1 answer:

nevsk [136]2 years ago

6 0

The answer is 1200 teenagers

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For f(x) = √x-3 find f(f^-1(4))

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Answer:

4

Step-by-step explanation:

f⁻¹(x) = x²+3, but none of that matters, since f(f⁻¹(x)) = x

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2 years ago

Give the degree of each polynomial

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Sorry! number 12 is 2

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3 years ago

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Which points in the scatter plot are outliers?

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An outlier<span> is an observation that lies an abnormal distance from other values in a random sample from a population. In a sense, this definition leaves it up to the analyst (or a consensus process) to decide what will be considered abnormal. Before abnormal observations can be singled out, it is necessary to characterize normal observations.

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3 years ago

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The height of the tunnel at the center is 35ft, and the vertical clearance must be 21 ft at a point of 8ft from the center. Find

Zinaida [17]

Answer:

y=-0.215x^2+35

Step by Step:

Let, $h=0$ , $k=35$ , $x=8$ , $y=21$

We know that, the general equation of the parabola.

$y-k = a(x-h)^2$

$\Rightarrow y=a(x-h)^2+k .........(i)$

Substitute the value of $h, k, x, y$ in equation $(i)$ and find the value of $a.$

$21=a(8-0)^2+35$

$\Rightarrow 21=a\times 8^2+35$

$\Rightarrow 21=64a+35$

$\Rightarrow 64a=21-35$

$\Rightarrow 64a=-14$

$\Rightarrow a=\frac{-14}{65}$

$\Rightarrow a=-0.215$

Hence, the equation of the parabola is:

$y=-0.215x^2+35$

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2 years ago

Help! ASAP. The question is in the attachment below

andrezito [222]

Answer:

Step-by-step explanation:

The most obvious answer is the line y = 1.

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2 years ago