How do you calculate with real world measurements

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

A-2+3=-2 i really need with this i can not figure i out for nothing so can someone a friend

Which of the following shows the graph of y=2e^x