Its 12, becuse if its a Circle then you can look at it the same way you look at a clock which has 12 numbers on it and 4 and 11 are directly across each other.
Step-by-step explanation:
Geometric mean is the square root of the product.
√(9 × 11) = √99 ≈ 9.950
Answer:
1369
3.7 x 10 = 37 x 37 = 1369
when x = ±
15×27=405
405 is your answer