Provide an appropriate response.Urban encroachment is causing the area of a forest to decline at a rate of 3% per year. Use the approximate half-life formula to determine the fraction that remains in 63 years.
A. 0.535887
B. 0.970731
C. 1.350000
D. 0.153893
Answer: D
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Solve.If a tree 52.5 feet tall casts a shadow that is 21 feet long, find the height of a tree casting a shadow that is 5 feet long. Round to the nearest tenth of a foot, if necessary.
A. 36.5 ft B. 220.5 ft C. 2 ft D. 12.5 ft
Find the slope of the line. 
A. -2 B. -1 C. 1 D. 2
Find all indicated roots. Write your answer in the specified form.Cube roots of 1; rectangular form
A. -1, 1
B. 1, - 
+ 
i, - 
- 
i
C. 1, 
- 
i, - 
- 
i
D. 1, 
+ 
i, - 
+ 
i
The total hours for a Private pilot, single engine land rating for a single engine airplane is 90 h of flight time. The total hours of flight time for a Commercial rating is 340 h. What is the ratio of the hours for a Private rating to the hours for a Commercial rating?
A. 
B. 
C. 
D. 
E. 