Awheel has a radius of 15 cm . approximately how far does it travel in 4 revolutions?

a) 47.1 cm
b) 94.2 cm
c) 188.4 cm
d) 376.8 cm

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?