Solve the problem.The annual population density of a species of insect after n years is modeled by a sequence. Suppose that the initial density of insects is 678 with r = 0.8. Write a recursive sequence that describes this data, where an denotes the insect density during year n.
A. an = 0.8 an-1 , a1 = 678
B. an = 0.8 an+1 , a1 = 339
C. an = 0.8 + an-1 , a1 = 678
D. an = 
, a1 = 678
Answer: A
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Evaluate the root, if possible.
A. 
B. 
C. 
D. 
Verify that each equation is an identity.cos4 x = 
(3 + 4 cos(2x) + cos (4x))
What will be an ideal response?
Solve. Write results using scientific notation.The following equation gives the number of atoms in 390 g of fluorine. How many atoms are there? A = 390 g Fl x 
x 
A. 4.46 x 1026 atoms B. 2.93 x 1024 atoms C. 1.23 x 1025 atoms D. 1.24 x 1025 atoms
Graph the quadratic function using its properties. Based on the graph determine the domain and range of the quadratic function.f(x) = x2 + 6x + 9
A. domain: {x|-? < x < ?}
range: {y|y ? 9}
B. domain: {x|-? < x < ?}
range: {y|y ? 9}
C. domain: {x|-? < x < ?}
range: {y|y ? 0}
D. domain: {x|-? < x < ?}
range: {y|y ? 0}