if you have a graphing calculator (i use a website called desmos) put in x < 3. i attached a photo of what the graph should look like. the shaded area is where the solutions are. since the shaded area ends with a dotted line, points on that dotted line are <u>not</u> part of the solution.
i hope this helps! sorry i couldn't give a more descriptive explanation... it's pretty much all in the picture lol. have a lovely day! <3
The value of t that makes the factor e^(.032t) have the value of 2 can be found using logarithms. 2 = e^(0.032t) ln(2) = ln(e^(0.032t)) = 0.032t t = ln(2)/0.032 ≈ 21.66