In 8,574.1 which digit is in the tenths place

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

Construct the graph that models the given situation

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?