Suppose that an electronics manufacturer claims that on average at scanning systems last 10 years if it's gaming systems do in fact us an average of 10 years what would be the expected mean amount of time a sample of companies gaming systems would lasta. 12 yearsb. 10 years c. 7 yearsd. 5 years

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

answer:

your answer is: c. 196 7/8 in^3.

95.03 is the answer. hope this !

25.3

step-by-step explanation:

1st step

add 3+6

=9

multipy 9*3

=37