All right i just earned that today!
This is the formula An = A1 + ( n-1 )D
You would take A19 = -1 + ( 19 - 1 ) -4
-1 + 18(-4)
-1 + -72
-73
Hope that helped!
:)
Answer: The model is 69.420 feet tall.
Step-by-step explanation: I asked my teacher.
I believe it is c if i am not wrong
the reciprocal of -5 is -1/5
D/2=r
12/2=6
a=pir^2
a=pi6^2
a=36pi
a=113.04
3rd option again
