The 1st row has 15 chairs.
The 2nd row has 15 + 3 = 18 chairs.
The 3rd row has 18 + 3 = 15 + 2•3 = 21 chairs.
The 4th row has 21 + 3 = 15 + 3•3 = 24 chairs.
The pattern continues, so that the n-th row has 15 + (n - 1)•3 = 3n + 12 chairs.
If there are 15 rows, then the total number of chairs is
where we use the formulas
Answer:
the answer to this is 7 over 13
Jaxson is experiencing a biological stressor type.
<h2>What is a biological stressor?</h2>
A biological stressor is defined as that external or internal stimulus that directly destabilizes the dynamic balance of the individual, that is, they act directly on the organism causing or triggering the stress response.
<h3>Characteristics of a biological stressor</h3>
They produce certain biochemical or electrical changes that automatically trigger the stress response.
These stimuli bypass the cognitive appraisal mechanism and work directly on the neurological and affective elicitor nuclei.
Therefore, we can conclude that in a biological stressor, the physiological response occurs in the organism to the stressor stimuli regardless of the interpretation we make of the situation.
Learn more about a biological stressor here: brainly.com/question/17034778
I believe when studying, you should read and study as much information as you can, textbooks, Notes, research, ETC. Studying is for you to put everything you have learned into one.
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The technique to improve internal validity is D) Addition of a control group.
<h3>What is
internal validity?</h3>
Internal validity serves as the study which bring about the establishment of a trustworthy cause-and-effect relationship that can be found in treatment and an outcome.
it should be noted that Internal validity also helps to eliminate alternative explanations , hence, The technique to improve internal validity is D) Addition of a control group.
Learn more about internal validity on:
brainly.com/question/968894
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COMPLETE QUESTOIN:
Which of the following is a technique to improve internal validity ____________?
A) Experimenter expectancy
B) Participant bias
C) Use of a confederate
D) Addition of a control group
