Solve the formula for the indicated variable.A = P(1 + rt) for t
A. t = 
B. t = 
C. t = - 
D. t = 
Answer: D
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Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation. 2x - y - 4z = -12-7x + 9y - 3z = 13-3x - 3y + z = -15
A. (2, 3, 4) B. (-2, 4, 4) C. (2, 4, 3) D. No solution
Solve the problem, using 3.14 for ?. Round to nearest tenth unless instructed differently.Find the cost to asphalt a circular racetrack if asphalt costs $90 per 100 ft2. (Use 3.14 for ?. Round to the nearest dollar.) r = 85 ft R = 140 ft
A. $34,195 B. $55,390 C. $34,972 D. $20,418
Match the graph with its function using the x-intercepts.
A. f(x) = x1/2 + 11x1/4 - 12 B. f(x) = x1/2 - 11x1/4 - 12 C. f(x) = x1/2 + 2x1/4 - 1 D. f(x) = x1/2 + 2x1/4 + 1
Solve the problem.Suppose that the function y = f(x) is increasing on the interval (2, 7). Over what interval is the graph of 
increasing?
A. (2, 7) B. (-2, 3) C. (8 , 28) D. (6, 11)