I have 3 problems I couldn't solve...
The half life of Uranium 230 is 20.8 days, the time needed for 50% to decay. How long would it take for 20% of uranium 230 to decay? I used simple proportion but it didn't work. (6.70 days)
At what value of x does the slope of the curve [unparseable or potentially dangerous latex formula] equal 17? (Which formula do you use to get the derivative?) (0.100)
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