Answer: 25pi
Explanation: area = piR^2 so 10(radius)^2 = 100pi, only 1/4 of the circle is there so divide the area found (100pi) by 4 to find the one quarter of the circle.
There’s 60 seconds in a min
60x54=3240
DrH = DrT + 0.019
DrE = DrH - 0.020
DrH is the most and DrE is the least
Simplify the radical, then combine the numbers.
-131