Please help <3 Here is a set of signed numbers:

7, -3, 1/2 , -0.8, 0.8, -1/10, -2

1. Order the numbers from least to greatest.
2. If these numbers represent temperatures in degrees Celsius, which is the coldest?
3. If these numbers represent elevations in meters, which is the farthest away from sea level?

1)-3,-2,-0.8,-1/10, 1/2, 0.8, 7

2)-3 is the coldest degrees in Celsius because it is the lowest number.

3)7 is the farthest from sea level because it is farthest away from zero.

Step-by-step explanation:

-3,-2,-0.8,-1/10, 1/2, 0.8, 7

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