Edmund wants to make socially responsible purchases which question should he ask? a) how much does the item cost b) what is the sales tax on the item c) can the item be purchased with a credit card . d) were the people who made the item paid a livable wage

Step-by-step explanation:

social responsibility is an ethical framework that suggests that an entity, be it an individual or an organization, has an obligation to act for the benefit of society at large. In other words, working in ways that are not harmful to society.

the question he should ask is : were the people who made the item paid a livable wage.

the value of v.w= -12.

step-by-step explanation:

we are given three vector r,v and w as:

r = < 5, -5, -2> ; v = < 2, -8, -8> ; w = < -2, 6, -5>

we know that r,v and w could also be represented as:

r=5i-5j-2k

v=2i-8j-8k

and w= -2i+6j-5k

where i,j and k are the unit vectors of x,y and z-axis respectively.

also we know that it has the following property:

i.i=1 ; j.j=1; k.k=1

and i.=j.i=i.k=k.i=j.k=k.j=0

i.e. when we multiply two vectors or we find it's dot product we need to only multiply the components of x coordinates with each other; y with each other and z with each other.

hence, v.w= (2i-8j- -2i+6j-5k)

                  = 2×(-2)+(-8)×(6)+(-8)×(-5)

                  = -4-48+40

                  = -12

hence, v.w= -12