The equation d = 25t+ 4 gives the depth of the snow on the ground during a snowstorm. The variable t stands for the time that has passed since the start of the storm and d stands
for the total depth of the snow in inches. Which statement is true?
The snow is 6.5 inches deep before the storm
starts
d = 2.5t + 4
The snow is falling at a rate of 4 inches per
hour
f = fime since storm started (hours)
=depth of snow (inches)
The snow is falling at a rate of 6.5 inches per
hour
The snow is 4 inches deep before the storm
starts

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

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

p

step-by-step explanation: