Solve the problem.In order for a chemical reaction to take place, the Fahrenheit temperature of the reagents must be at least 
Find the Celsius temperatures at which the reaction may occur. 
A. C < 368.28°
B. C ? 86.01°
C. C ? 86.01°
D. C ? 368.28°
Answer: C
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Find each product.(5r - 3)(5r + 3)
A. 25r2 - 9 B. 25 + 30r - 9r2 C. 25r2 - 30r - 9r2 D. 5r2 - 9
Provide an appropriate response. Evaluate: 25
A. -32
B. 
C. 32
D. 
Solve using Cramer's Rule.Twice the water flow in the hot-water pipe is the same as three times the flow in the cold-water pipe. The combined flow is 1400 liters per hour. What is the flow in each pipe?
A. 840 liters/hr hot, 560 liters/hr cold B. 700 liters/hr hot, 467 liters/hr cold C. 467 liters/hr hot, 700 liters/hr cold D. 560 liters/hr hot, 840 liters/hr cold
Solve.A plane flies 490 miles with the wind and 350 miles against the wind in the same length of time. If the speed of the wind is 27 mph, what is the speed of the plane in still air?
A. 152 mph B. 167 mph C. 162 mph D. 187 mph