9a-36. Multiply the 9 by a, to give you 9a. Then by -4 to give you -36. All together that becomes 9a-36.
He difference between their sample means would likely stay the same.
I hope this help
Answer:
Step-by-step explanation:
whT
I'm assumig you meant ?=pi
so the area of the sector would be the area of the circle times the fraction of the circle that is
the fraction of the circle would be degrees/360 since 360 degrees in a circle
and area of course is pir^2
so
r=8
degrees=120
so
area=pi8^2 times 120/360
area=64pi times 1/3
area=64pi/3
I think you mean 64/3 pi in²
so D is the answer