DUPLICATE
2 answers:
Draw the vector C⃗ =A⃗ +2B⃗ . The drawing is attached below
<h3>Further explanation </h3>Vector is a quantity that has a value and direction. It can be symbolized in the form of directed line segments. Operations on vectors include addition and subtraction.
In the drawing, vector B seems to be (1, 108 degrees) and vector A seems to be (4, 0 degrees) in the drawing.
Where If vector is added by inverse
then the sum becomes
If we multiply vector A by 1 then the length becomes 1 times vector A and in the same direction, so does vector B multiplied by the value of +2, which is 2 times the length of vector B in the same the direction as vector A, so we get vector C (attached picture) obtained by drawing a line from the starting point A and the endpoint B
<h3>Learn more</h3>- Learn more about the vector brainly.com/question/12501440
- Learn more about the drawing of vectors brainly.com/question/5029314
- Learn more about degrees of vectors brainly.com/question/11043027
Grade: 9
Subject: Mathematics
Chapter: the vector
Keywords: the vector, Draw, 108 degrees, 4, 0 degrees, the drawing
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Answer:
Yes, it can be concluded that the mean hexane concentration is less in treated water than in unsaturated water
Step-by-step explanation:
The number of of specimen in the samples of untreated water, n₁ = 16
The sample mean, = 228.0
The sample standard deviation, s₁ = 4.3
The number of of specimen in the samples of treated water, n₂ = 20
The sample mean, = 224.6
The sample standard deviation, s₂ = 5.0
The level of significance = 0.10
The null hypothesis, H₀; ≥
The alternative hypothesis, Hₐ; <
The degrees of freedom = 16 - 1 = 15
The test statistic, = 1.341
Plugging in the values, we get;
Given that the t-value is large, the corresponding p-value is low, therefore, we fail to reject the null hypothesis and there is considerable statistical evidence to suggest that the mean hexane concentration is less in treated than in untreated water, therefore, we have; ≥