There’s 2 peanut butter jars. One is 16 oz for $3.30
The other is 64 oz for $8.60

I need the answers to these:

A.) what is the price per ounce for the smaller jar of peanut butter?

B.) what is the price per ounce for the larger jar of peanut butter?

C.) which is the better buy? By how much?

THANK YOU IF YOU ANSWER THESE FOR ME AND ITS CORRECT <3

A) $0.21

B) $0.13

C) B is the better buy by $0.08/oz

Step-by-step explanation:

A) 3.30 ÷ 16 = 0.20625 = $0.21

B) 8.60 ÷ 64 = 0.134375 = $0.13

C) $0.21 - $0.13 = $0.08 difference/ounce

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