R = {10, 15, 20} S = {20, 25}

R ∩ S =

{10, 15, 25}
{10, 15, 20, 25}
{20}
{ }

R n S = {20}

Step-by-step explanation:

n in sets means same elements found in the sets which are being compared

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