6. Michael's bicycle wheel has a diameter of 80 cm. What is the circumference of the wheel? A. 251.2 cm B. 252.1 cm C. 251.1 cm D. 252.2 cm . The radius of Martha's circular garden is 3 meters. How many meters of wire are needed to put a fence around it? A. 8.184 m B. 18.84 m C. 188.4 m D. 14.88 m 50% of 60 is 25% of a number. What is the number? ? A. 110 B. 120 C. 130 D. 140 There are 45 pupils in a class. 40 pupils are present. What percent of the class o absent? D. 90% A. 8% C.89% B. 11% 66? nd the missing term in this number sequence 82, 81, 78, .69 D. 76 B. 73 C. 75