4. [0/1 Points] DETAILS PREVIOUS ANSWERS LARPCALC10 4.1.006. Fill in the blank. The area A of a sector of a circle with radius r and central angle 0, where 0 is measured in radians, is given by the formula OA = _20 2 O A = LAP O A = TP OA = _20 OA = 10 X Need Help? Read It12. [0/1 Points] DETAILS PREVIOUS ANSWERS LARPCALC10 4.1.036. Convert each degree measure to radian measure as a multiple of 7. Do not use a calculator. (a) -60 CO N radians X (b) 1620 9 10 radians X Need Help? Read It16. [0/1 Points] DETAILS PREVIOUS ANSWERS LARPCALC1O 4.1.054. Find the radian measure of the central angle of a circle of radius r that intercepts an arc of length 5. Radius r Arc Length 5 11 feet 10 feet 0.909 X rad Need Help? 17. {0/1 Points] DETAILS PREVIOUS ANSWERS LARPCALC1O 4.1.056. Find the radian measure of the central angle. 9 = x radians 65 52