I am very confused, I think that is D) Trapezoid :c
help me:(

Ineed with number 6 , explain how to get 1978

Convert the mixed numbers into improper fractions. convert the improper fraction to mixed numbers.

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?