The table shows the soil density of several soil samples at different depths. Write the quadratic regression equation that models the data. Let x = depth below the surface and let y = soil density. Use the equation to estimate the soil density of a sample at a depth of 20 m. Show your work.

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step-by-step explanation:

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step-by-step explanation:

left be aligning the decimal points is required to not required see the number of digits to the right

the answer is a.

135 and 80

step-by-step explanation:

“ a line segment that has the endpoints on the circle and passes through the midpoint is called the diameter. the diameter is twice the size of the radius. a line segment that has its endpoints on the circular border but does not pass through the midpoint is called a chord. a circle is the same as 360 small circle up the number 0 . i hope this .