Solve.When a principal P earns an annual interest rate r compounded yearly, the amount A after t years is A = P(1 + r)t. How long will it take for a principal to double at 9% compounded annually? Round to the nearest whole year.
A. t ? 7 years
B. t ? 8 years
C. t ? 9 years
D. t ? 5 years
Answer: B
Mathematics
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Solve the problem.A piece of cable which is 
m long is to be cut into pieces 
m long. How many pieces will there be?
A. 
piece
B. 30 pieces
C. 50 pieces
D. 6 pieces
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Find an equivalent expression for the given logarithm using the change-of-base formula.
?
?
A. 
B. 
C. 
D. 
E. 
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Write in scientific notation.0.00006842
A. 6.842 × 105 B. 6.842 × 104 C. 6.842 × 10-4 D. 6.842 × 10-5
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Graph the equation. Give the domain and range. Identify whether the equation is a function.
= 
A. 
[-7, 7]; [0, 9]; function
B. 
[-7, 7]; [-1, 0]; not a function
C. 
[-7, 7]; [0, 1]; not a function
D. 
[-7, 7]; [-9, 0]; function
Mathematics