Solve the problem.A deposit of $7000 is made in an account that earns 7% interest compounded quarterly. The balance in the account after n quarters is given by the sequencean = 7000
n n = 1, 2, 3, ... Find the balance in the account after 8 years.
A. $12,019.49
B. $12,284.49
C. $12,282.49
D. $12,195.49
Answer: D
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Solve the problem.Using a phone card to make a long distance call costs a flat fee of $0.85 plus per $0.19 minute starting with the first minute. Find the total cost of a phone call which lasts 8 minutes.
A. $8.16 B. $2.37 C. $6.00 D. $1.52
Solve.A circular fountain has a diameter of 43 ft. Approximate the distance around the fountain. Use 3.14 for 
A. 5805.86 ft B. 270.04 ft C. 67.51 ft D. 135.02 ft
Solve the problem.What is the domain of the cosine function?
A. all real numbers, except odd multiples of 
(90°)
B. all real numbers, except integral multiples of ? (180°)
C. all real numbers from -1 to 1, inclusive
D. all real numbers
Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists.x + 8y + 8z=87x + 7y + z=18x + 15y + 9z=-9
A. {(0, 0, 1)} B. ? C. {(-1, 0, 1)} D. {(1, -1, 1)}