I’m stuck on this i don’t understand.

the 1st one

Step-by-step explanation:  imaginary number-that is expressed in terms of the square root of a negative number (usually the square root of −1, represented by i or j ).

no pictures of the graph

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