Solve the following application involving ordered pairs. State your answer as an ordered pair and in words.A bank account with an initial balance of $400 earns simple interest at a rate of 2%. The amount A in the account after t years is modeled by the following equation: 
How long must the money stay in the account to reach an amount of $472?
A. (8, 472); It would take 8 years for the amount in the account to reach $472.
B. (10, 472); It would take 10 years for the amount in the account to reach $472.
C. (9, 472); It would take 9 years for the amount in the account to reach .
D. (11, 472); It would take 11 years for the amount in the account to reach $472.
Answer: C
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+ 
- 
+ ... + (-1)n-1 
+ ...
A. 
; 
B. 
; 
C. 
; 9
D. 
; 9
Use the shell method to find the volume of the solid generated by revolving the region bounded by the given curves and lines about the x-axis.x = 8 - y2, x = y2, y = 0
A. 32? B. 8? C. 4? D. 16?
Solve the problem.A person with no more than $1000 to invest plans to place the money in two investments, telecommunications and pharmaceuticals. The telecommunications investment is to be no more than 3 times the pharmaceuticals investment. Write a system of inequalities to describe the situation. Let 
to be invested in telecommunications and 
to be invested in pharmaceuticals.
A. x + y = 1000 x ? 3y x ? 0 y ? 0 B. x + y = 1000 y ? 3x x ? 0 y ? 0 C. x + y ? 1000 x ? 3y x ? 0 y ? 0 D. x + y ? 1000 3x ? y x ? 0 y ? 0
Solve.Steve and Kim have put in a new tile entryway in their house. The tiles measure 8 × 8 in. and have grout joints 
in. wide. Use the diagram to find the width of the entryway.
A. 280 in2
B. 40
in.
C. 40
in.
D. 2308
in2