Hasan, Ali , omid and Reza can do something in 56,4,8,x+1days respectively. If Hassan and Ali work together to finish the job . How many days does Omid alone finish the job ?? First person have true answer l get a brainlist mark :)

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?

Here is another math questions. i will keep asking different questions. 4^2x=6

Benefit(s) from large economies of scale, in which the costs of goods decrease as output increases. natural monopolles perfect competition