Simplify the expression. Assume all variables represent positive real numbers.
? 
A. 7m4
B. 7m5
C. 14m2
D. 7m6
Answer: B
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Determine the center and the radius of the circle.x2 + y2 - 8x - 6y + 21 = 0
A. (4, -3), r = 2 B. (-4, -3), r = 2 C. (4, 3), r = 2 D. (-4, 3), r = 2
Solve the problem. Round your answer to the nearest hundredth.A conveyor ramp carries heavy equipment up to an elevated platform. The platform is 42 ft above ground level and the angle of elevation of the ramp is 20°. How long is the ramp?
A. 15.29 ft B. 122.80 ft C. 44.70 ft D. 39.47 ft
Approximate the square root. Round to the nearest tenth, if needed.
A. 83 B. 830 C. 3444.5 D. 88
Solve the problem.The water is drained from a tank by opening a valve at the bottom of the tank. The depth of the water in the tank t hours after the valve is opened is d(t) = 6
2 meters. If the valve is opened at 1 pm, what is the depth of water at 3 pm?
A. 5.83 meters B. 3.38 meters C. 5.00 meters D. 4.17 meters