The way the combination "Solution-Scratch pad" works, is confusing and awful.
These are trivial problems, and still (!), in submitting them - by the way Cody and it's solution check-out works, make them frustrating to solve - one is asking why they don't work. Even if you make a fast-running error as I did (the square of g was omitted in the first few attempts, the solution is exact (with wrong formula) for the 1st test: bank(1,1)....).... You should delete the wrong solutions as they don't have any value: nor for new solvers, nor for the ones when they "solve" the problem.
I understand, You tried to de-incentivize people to submit wrong answers - many times, but by keeping them listed (wrong solutions), you give not even a marginally statistically worth information - it's crap and garbage, based on may subjective factors for errors, especially taken into account the way the Solution-Solver scratchpad work. And, they are nor user-friendly, nor similar to true MATLAB environment.
Interesting question 😁
Back to basics 14 - Keywords
Sum of series II
Write c^3 as sum of two squares a^2+b^2
Convert from Fahrenheit to Celsius
Solve a System of Linear Equations
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