Its not lisa but i don't know if its B or C
Bill and Lisa are surveying their classmates about their summer reading. Their questions are given below:

Bill: How many books were recommended by the book reading club this month?
Lisa: How many books did you read from the recommended list?

Who wrote a statistical question and why? (5 points)

Lisa, because there can be only one answer to the question

Bill, because there can be many answers to the question

Lisa, because there will be variability in the responses collected

Bill, because every student will give the same answer

It's not A, B, or D. So, the best choice would be, C. Lisa, because there will be variability in the responses collected.

C: Lisa because there will be variability in the responses collected.

Step-by-step explanation:

I took this test before and got a 100% hope this helped! :)

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

ome people is not even worth it to even try it in the air.

step-by-step explanation: