Amy and her father are playing with a squeaky toy. Amy's father is squeezing the toy in front of Amy. Amy is very excited and reaches for the toy. Amy's father, however, quickly hides the toy behind his back. At this point, Amy turns away from her father and begins to look at the ladybug design on her dress. Amy is probably approximately what age?

Amy is 6 moths to 1 year

Step-by-step explanation:

Amy is probably around 6 moths to a year old and the fact that she immediately turns attention to something else tells a lot that she is still too young and hasn't attained much development as a child who has reached 2 years or more.

The reason for her focusing attention somewhere else is due to the fact that her brain hasn't developed much and she doesn't even recall what happened a couple of seconds ago which is one of the characteristics of kids under her age,but with time and she will develop and remember more.

b) the dogs need to shift their focus to human scent.

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