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Calculus and Beyond Homework Help
Can someone explain the process of this problem?
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[QUOTE="BillTheButcher, post: 4521887, member: 489678"] Problem 1: The position of a body moving on a coordinate line is given by S = t2 - 4t + 4, with S as meters and t as seconds. When, if ever, during the interval 0 <_ t<_ 4 does the body change direction? Here I just don't know how we get from "S = t2 - 4t + 4" to "V=ds/dt = [B]2t - 4[/B]. Problem 2: The size of a population of lions after 't' months is given by P=100(1+0.2t+0.02t2=. Find the growth rate when P=2500. Here, I don't understand at the end of the Problem 2-b picture, why is the solution t=30 months when in our calculations we had (t+40)(t-30)=0. Why let '40' out and use only '30' as an answer? In the same problem, I don't understand how he got from multiplying that equation times 100 which resulted in =100+20t+2t2 to dP/dt=20+4t? I don't get those sketches in problem 3. In problem 4, in next to last line, I don't get how he got from y=3x+2+x-1+x-2 to y' = 3-x-2-2x-3. As for problem 5, starting the 2nd I don't know how he got there. [/QUOTE]
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Calculus and Beyond Homework Help
Can someone explain the process of this problem?
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