Use the formula for the general term (the nth term) of a geometric sequence to find the indicated term of the sequence with the given first term, a1, and common ratio, r.Find a9 when a1 = 4,000, r = 
.
A. 
B. 
C. 
D. 
Answer: C
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Solve for R1:
R1 ð R2 RT = ÄÄÄÄÄÄÄ R1 + R2 a. RT - R2 R1 = ÄÄÄÄÄÄÄ RT + R2 b. RT ð R2 R1 = ÄÄÄÄÄÄÄ RT + R2 c. -RT ð R2 R1 = ÄÄÄÄÄÄÄÄ RT - R2 d. R2 + RT R2 = ÄÄÄÄÄÄÄ RT - R2 e. RT + R2 R1 = ÄÄÄÄÄÄÄ R1 ð R2
Solve the equation.(x - 7)(x + 9) = 0
A. {7, -7, 9, -9} B. {7, 9} C. {7, -9} D. {-7, 9}
Divide.-0.4 ÷ 0.02
A. -20 B. -3.8 C. -2 D. -0.38
Tell whether the expression is a monomial. If it is, name the variable(s) and coefficient, and give the degree of the monomial.2xy2
A. Monomial; variables x, y; coefficient 2; degree 1 B. Monomial; variables x, y; coefficient 2; degree 3 C. Monomial; variables x, y; coefficient 2; degree 2 D. Not a monomial