1. for making a scatter plot of the data set, which would be the best scale and interval for the axis that represents the amount of fluoride?
2. which statement is true?
3. the scatter plot shows how many desks and computers were found in 12 different offices.
how many offices had 11 computers?
4. the scatter plot shows how many desks and computers were found in 12 different offices.
how many offices had more than 5 desks?
5. a parking lot can hold cars and small trucks. the scatter plot shows how many cars and trucks parked at the parking lot each day for a week.
what is the daily average number of trucks parked at the lot that week? round to the nearest tenth, if necessary.

answer i need the answer too

step-by-step explanation:

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