An apple tree is 3.6 meters tall it’s roots extend 7/4 meters below the ground what is the difference in elevation between the top of the apple tree and it’s tops of its roots

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units