log3(13) using change of base formula: logb(m) =On your TI-84 calculator 1. Press ON 2. Press CLEAR 3. Press LOG see log( 4. Type 13) see log(13) 5. Press ÷ see log(13)/ 6. Press LOG see log(13)/log( 7. Type 3) see log(13)/log(3) 8. Press ENTER see 2.334717519 Answer: 2.334717519 Edwin