The problem
this is not an option in my multiple choice answers
Answer provided by our tutors
I suspect that there is a typo in the entry... I see "80(t)" and typically "80 multiplied by t" would simply be entered as "80t", so perhaps the nomenclature is at issue.
It's an interesting equation and it is not normal for the solver. Our solver is designed for algebraic manipulations and the numeric value can be obtained by changing to 'real decimals' rather than 'integers' (use the 'Options' tab). However, that particular equation, as written, does not have a numeric answer but there are answers with imaginary numbers.
That type of equation is best solved either through the desktop Algebrator or through the 'Advanced' tab on quickmath.com:
...and, again, I can't imagine that the imaged solution is going to match any answers from which you have to choose:
