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Trading: Primarily Energy but also a little Equities, Fixed Income, Metals and Crypto.
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Your answers are correct but I wouldn't describe the way you do.
Below $230 is your max loss - you lose premium (19.6-17) $2.60 * 100 = $260
Above $350 is your max gain - you make $5, verses premium of $2.60 so (5-2.6)8100 = $240
Interesting that with the stock at 230 that the 230/235 call spread has a less than 50/50 win/reward!
When they were first designing listed options, they needed to know the hedge ratio. That was solved by Black and Scholes, which was a remarkable advance in the 70s. A binomial model is simpler to understand I think. An ATM option should have a hedge ratio of .5, that is the option will move about $0.50 for each $1 move in the stock over short distances.
Hedge ratio was a great term but then it got spoiled by changing the name to delta and then using 3 other greek letters for more trivial stuff that is probably close to worthless. The academics gave them greek letters so normal people can't type them.
