The table shows the soil density of several soil samples at different depths. Depth (m)156810121421232428
Soil density ( )
10451063110211401191123212491254126 512681273

(a)Write the quadratic regression equation that models the data. Let x = depth below the surface and let y = soil density.
(b)Use the equation to estimate the soil density of a sample at a depth of 20 m.

40 is the final : )

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this

pakistan's principal natural resources are arable land and water. about 25% of pakistan's agriculture accounts for about 21% [1] of gdp and employs about 43% of the labour force. in pakistan, the most agricultural province is punjab where wheat and cotton are the most grown.

answer by yourhope:

hi! : )

a farmer that lived in ancient egypt would most likely be barried in the sand, in the desert!

: )