can you please help me with this it's grade 11 mathematics

G 50 m 75 O The centre of the circle is O. Determine the arc length GH. Use 3.14 for pi. Round to one decimal place. (8 Evaluate log 64 of base 4 Write answer to the nearest hundredth. For example if answer - 8.069 only type 8.07 (5) You can check to see if a graph represents a function by seeing if the function crosses it once and only once when a) Drawing a vertical line. b) Drawing a horizontal line. c) Drawing the inverse. d) Drawing the reciprocal. (6) If sin B = 0.8829, what are the approximate angle measurements. A) 62 and 295 B) 62 and 118 C) 62 and 242 D) 62 and 152