At 6 a. m., the temperature was –12°c. by 9 a. m., the temperature had risen by 8°c. by noon, the temperature was double what the temperature had been at 9 a. m. what two operations do you need to use to find the temperature at noon?

the answer is addition&multiplication

Step-by-step

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