Simplify.
A. 
B. 
C. 
D. 18y(y + 4)
Answer: A
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On a certain island there are initially 4.6 new species per year introduced. This number decreases by 4% each year. But conditions cause some species to become extinct. Initially 1.7 species per year become extinct. The number increases by 14% each year. ? A: Using N for new species per year, find a formula that gives the number of new species per year introduced after t years. ? B: Using E for extinction rate, find a formula that gives the rate of extinction t years. ? C: Make a graph that shows both N and E over the first 10 years. ? D: When will the rate of extinction be the same as the rate new species are being introduced? Round your answer to two decimal places if necessary.
What will be an ideal response?
Use DeMoivre's Theorem to find the indicated power. Write the answer in rectangular form.
10
A. -210i
B. 210 
C. 2 
D. -210
Use the indicated row operation to change the matrix.Replace R2 by 
R1 + 
R2. 
A. 
B. 
C. 
D. 
Solve the equation.x2 = -2x
A. x = -2 B. x = 0, x = -2 C. x = 2 D. x = 0, x = 2