Can somebody help me qith this please, im not 100% what the answer is

What is the logarithmic function modeled by the following table? x f(x) 9 2 27 3 81 4

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers