We have the formula S= r * theta , where S is arc length , r is radius , and theta is central angle in radians
So AB= 4 * 45* π/180 = π units
What variable are you solving for ?
Answer: x^2x-12 (by the way ^2 is a square)
If there are 5,280 feet in one mile, multiply that by 7 to get 36,960 ft
If that's 6 time 32 its -1788
but if its 6.32
its 440.16