What is the solution of 7+m< 2 or m+1> 2

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

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?

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cot of 61.6