Answer:
9841
Step-by-step explanation:
Each time the number of shaded triangles is multiplied by 3. So this is a geometric series:
an = 1 (3)ⁿ⁻¹
The sum of the first n terms of a geometric series is:
S = a₁ (1 - rⁿ) / (1 - r)
Here, a₁ = 1, r = 3, and n = 9.
S = 1 (1 - 3⁹) / (1 - 3)
S = 9841
the answer for that question is 7 adults and 9 students
Look at attached photo for graph and the points in the picture is where the lines intersects them
SOLUTION
We want to find the area of the circle in the picture given.
We have been given the formula as
From the circle, the radius r = 11 in.
The area of the circle becomes
Hence the answer is 363 square-inches