please need help ASAP Use scalar multiplication to determine the coordinates of the vertices of the dilated figure. Triangle with vertices a(1,8),b(6,1),and c(-9,4) with scale factor 5/2

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?