The book states

Three Vectors

U= Uxi + 3j+2k

V= -3i + Vyj+3k

W= -2i + 4j+Wzk

are mutally perpendicular Use dot product to solve for the componets

Ux,Vy & Wz

I do not know how to begin and am pretty confused the answer are

Ux=2.875

Vj= .857

Wz=-3.143

Can anyone help??