It should be the 2nd one starting from the left
It would be 282.7 or 283 for the total surface area. Since the radius is three and the height is 12.
Step-by-step explanation:
the common ratio is -4
Gn=2 (-4)^n-1
I FOUND YOUR FULL QUESTION IN OTHER FUENETES.
PLEASE SEE ATTACHED IMAGE.
For this case what you should do is find the area of the triangle which will be given by:
A = (1/2) * (b) * (h)
Where
b: base
h: height
Substituting the values we have:
A = (1/2) * (25 1/2) * (15)
A = 191.25 feet ^ 2
Answer:
she will need 191.25 feet ^ 2 to cover the back of the cabin