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victus00 [196]
3 years ago
7

In one investigation, researchers followed three adolescent cohorts, each born a year apart, over three years to see if family h

armony changed as the participants experienced dramatic physical and psychological changes. After ruling out ________, the researchers concluded from this ________ design that family closeness declines steadily from sixth to tenth grade.
Advanced Placement (AP)
1 answer:
Vitek1552 [10]3 years ago
8 0

Answer:

cohort effects and sequential

Explanation:

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d) column 2 and 3 is the correct option.

Explanation:

Force holding the galaxies together is gravity.

Types of matter will be similar.

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2 years ago
A breakout marketing technique called ______ advertising, based on psychological principles, was revealed in the 1950s.
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Alexxx [7]

Answer:

1. f has an inflection point at x = -1.5

Explanation:

Let's analyze each statement given.

1. f has an inflection point at x = -1.5 --> TRUE

An inflection point is a point in which the function f(x) changes concavity: this means that the first derivative of a function has a relative minimum or maximum, and therefore the second derivative is zero, f''(x_0)=0.

In this case, we see that at the point

x = -1.5

The first derivative is flat: this means that at this point, the second derivative is zero, so this is an inflection point.

2. f is increasing on the interval from x = -3.2 to x = -4.5. --> FALSE.

We simply don't know this: in fact, we cannot see the graph of the derivative between -4.5 and -3.2, therefore we don't know if the function is increasing or not.

3. f has a relative minimum at x = 1.5 --> FALSE.

A function f(x) has a relative minimum at a point x_0 if the first derivative f'(x) is zero at that point:

f'(x_0)=0

and moreover, the derivative is negative on the left of the point and positive on the right of the point.

This is not the case: in fact, we see that at x = 1.5 the first derivative is not zero, therefore this statement is not true.

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3 years ago
Consider the following statement.
Whitepunk [10]

Answer:

UK and when will I travel t take the camp

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