Convert the radical expression to its rational exponent form and then simplify. Assume that all variables represent positive numbers.
A. x7/2y6/7
B. x2/7y6/7
C. x2/7y7/6
D. x7/2y7/6
Answer: C
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Find the product.4x5(-6x5 + 5x4)
A. -24x10 + 5x4 B. -4x5 C. -4x10 - 4x9 D. -24x10 + 20x9
Solve.A weather forecaster has predicted a high temperature of 11°C for tomorrow. Convert this temperature to degrees Fahrenheit, rounding to the nearest tenth.
A. 25.9°F B. 51.8°F C. 38.1°F D. 12.2°F
Solve the problem.Car A (travelling north at 30 mph) and car B (traveling west at 20 mph) are heading toward the same intersection. Car A is 6 miles from the intersection when car B is 8 miles from the intersection. Find parametric equations that describe the motion of cars A and B. 
A. Car A: x = 0, y = 30t - 6; Car B: x = 8 - 20t, y = 0 B. Car A: x = 0, y = 20t - 8; Car B: x = 30t - 6, y = 0 C. Car A: x = -30t + 6, y = 0; Car B: x = 8 - 20t, y = 0 D. Car A: x = 20t - 8, y = 0; Car B: x = 0, y = 6 - 30t
Solve the problem.
The graph of y = f(x) depicts the amount of cash y in dollars that a bank teller has at his station after x minutes. (i) When did the largest withdrawal occur? (ii) How much was it?
A. After 137.5 minutes; $150 B. After 62.5 minutes; $250 C. After 25 minutes; $150 D. After 137.5 minutes; $250