Please help me its due today

btw the drop down has the option (first) of (second)

What is the radical expression that is equivalent to the expression 27 1 over 5?

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?

What is the explicit formula for this sequence -7, -4, -1, 2, 5