Factor completely and then place the factors in the proper location on the grid. 4 a2 - 8 a - 5
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Answer:
And i fwe look into the normalstandar dtable we can find the desired probability:
And then the The area to the right of z = 1.51 is 0.0655
Step-by-step explanation:
For this case we want to find the following probability:
And for this case we can use the normal standard distribution and the complement rule and we have this:
And i fwe look into the normalstandar dtable we can find the desired probability:
And then the The area to the right of z = 1.51 is 0.0655
Using the linear regression equation, the concentration of the unknown solution is 0.2161 M.
Linear regression describes the relationship of two variables. It may not be exact but it is the line that best fit the data. The equation for a linear regression is in the form y = bx + a, where x and y are the two variables.
If the absorbance of an unknown was determined to be 0.67 absorbance units, using the linear regression equation provided from the plot, substitute the value of absorbance to the variable y and solve for the value of x or the concentration.
y = 3.8674x - 0.1657
0.67 = 3.8674x - 0.1657
3.8674x = 0.67 + 0.1657
3.8674x = 0.8357
x = 0.2161
Hence, the concentration is 0.2161 M.
Learn more about linear regression here: brainly.com/question/25311696
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