How much of the human body is composed of proteins

Protein makes up approximately 20 percent of the human body and is present in every single cell

Explanation:

Protein makes up approximately 20 percent of the human body and is present in every single cell.

no

sodium is solid at rt

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west