One isotope of holmium, 162 Ho, has a half-life of 22 minutes. The half-life of a second isotope, 164 Ho, is 37 minutes. Starting with a sample containing equal amounts, find the ratio of the amounts of 162 Ho to 164 Ho after 42 minutes.
?
A. 0.5946
B. 0.5848
C. 1.7100
D. 1.6818
E. 24.5621
Answer: B
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Express the integrand as a sum of partial fractions and evaluate the integral.
dx
A. 5 ln 
+ 
- ln 
+ sin-1 
+ C
B. 6 ln 
+ ln 
+ 
tan-1 
+ C
C. 7 ln 
+ ln 
+ 
tan-1 
+ C
D. 6 ln 
- 
+ ln 
+ 
tan-1 
+ C
An undercover police officer is assigned the job of once a night walking each of the 48 blocks of a certain section of town described by the street grid shown below. The walk starts and ends at A. The officer wants to minimize the total number of blocks he has to walk each night.
Suppose that it takes the officer 5 minutes to walk a block. In an optimal trip, the officer will cover the entire neighborhood in
A. 5 hours. B. 4 hours and 45 minutes. C. 4 hours and 50 minutes. D. 5 hours and 10 minutes. E. none of these
Solve the problem.Andrea Gilford's savings account has a balance of $3200. After 4 years, what will the amount of interest be at 12% APR compounded quarterly?
A. $1940.06 B. $1926.06 C. $192.00 D. $1935.06
Solve the inequality and write the solution set using interval notation; then graph the solution set on a number line. p2 - 7p + 6 > 0
A. (-?, 1)
B. (6, ?)
C. (1, 6)
D. (-?, 1) ? (6, ?)