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The boundary of a park is shaped like a circle. The park has a rectangular pound in the center and are flower beds, one on each side
of the playground. The tenth of the playwround ist and its width is w. The feath of each side of the flowers in which wouvent
expressions represent the total fencing material required to surround the playwound and flower bacheme that the playwound and beds
do not overlap
The total fending material required to fence the playwound and both flower beds is
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10 * 563.67 = 5636.7

if this is really you s much. i only have 3 points left and i have 2 questions to ask

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

is there any photos or whatever?