The answer is 1.
EXPLANATION
The commutative property of multiplication states that two numbers can be multiplied in either order.
The angle the radius makes with AB is a right angle, so the Pythagorean theorem applies.
r² = 17.4² - 7² = 253.76
r = √253.76 ≈ 15.9
The length of radius r is about 15.9.
3(6x+1) I’m not sure but probably this could be right
B: 3 & 9
They are the smallest numbers but three still fits into both of them