What is the arc length of an angle of 2 pi/3 radians firmed on the unit cirlce

Nnnnneeedd 1.find the residual if you know the actual number is 5.2 and the predicted value is 4.8

What is the length of an with endpoints a 3,2 and b 8,14

Will mark brainliest if you answer ! the taco shop sold 198 lunches friday. this number is 3 more than 3 times the number they sold monday. let n represent the number of lunches sold monday. which equation shows an equality between two different ways of expressing the number of lunches sold on friday? a. n – 3 = 198 b. 3n – 3 = 198 c. 3n + 3 = 198 d. n + 3 = 198