Find the area of the triangle. If necessary, round the answer to two decimal places.a = 4, b = 5, c = 7
A. 9.80
B. 3.46
C. 10.01
D. 16.01
Answer: A
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Solve the problem.A 100 gal tank is half full of distilled water. At time = 0, a solution containing 2 lb/gal of concentrate enters the tank at the rate of 4 gal/min, and the well-stirred mixture is withdrawn at the rate of 
When the tank is full, how many pounds of concentrate will it contain?
A. 187.5 pounds B. 175 pounds C. 150 pounds D. 200 pounds
Simplify the expression.
+ 
A. 
B. 
C. 
D. 
Solve the problem.A bacterial culture has an initial population of 10,000. If its population declines to 7000 in 4 hours, what will it be at the end of 6 hours? Assume that the population decreases according to the exponential model.
A. 1500 B. 5857 C. 8156 D. 2929
Provide an appropriate response.A student is solving the equation x2 = 11x This student has decided to divide both sides of the equation by x and finds the solution x = 11. The student checks the answer in the back of the book and finds that x = 0 is also a solution. The student feels that this is a misprint. How would you advise him or her?
What will be an ideal response?