11.27: A.4.1- Section 4.1 Answers
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1. Q=20e−(tln2)/3200
2. 2ln10ln2days
3. τ=10ln2ln4/3minutes
4. τln(p0/p1)ln2
5. tptq=lnplnq
6. k=1t2−t1lnQ1Q2
7. 20 g
8. 50ln23yrs
9. 252ln2
10.
11.
12. 125 yrs
13. V=V0etln10/24 hours
14. 1500ln43ln2yrs;2−4/3Q0
15. W(t)=20−19e−t/20;limt→∞W(t)=20 ounces
16. S(t)=10(1+e−t/10;limt→∞S(t)=10 g
17. 10 gallons
18. V(t)=15000+10000et/20
19. W(t)=4×106(t+1)2 dollars t years from now
20. p=10025−24e−t/2
21.
22.
23.
24. P0={S0(1−e(a−r)T)r−aif a≠rS0Tif a=r