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Step-by-step explanation:

a^2 - b^2 = (a+b) (a-b)

So, a^2 = n^16, therefore a = square root of n^16

So = n^4

Now, b^2 = 9, so, b = square root of 9 = 3

So a = n^4

And b = 3

Now let's substitute everything

(a+b) (a-b) = (n^4 + 3)(n^4 - 3)

answer rather than having to add and subtract the measurements of the semi-circle, notice that the semicircle to the left of ad is actually identical in area to the blank semicircle-shaped space to the left of bc. so if we transferred the red semicircle into the blank space, we would end up with a square of side length 24 cm. the area of a square is s^2 = 24^2 = 676 cm^2.

u also answered this so i think u would know but i am here to

put in or use mine

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.