Respuesta :

popalabdulqayou
a)

y= ax²+bx+c

use a scientific calculator to find a, b and c:

a= -.4931097152

b=23.37398868

c=996.028896

y= -.49x²+23.37x+996.03


b)

y=-.49(20)+23.37(20)+996

soil density is approximately is 1453.6