Find the derivative of the function.f(x) = 
A. f'(x) = 
B. f'(x) = - 
C. f'(x) = 
D. f'(x) = - 
Answer: B
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The cross-sectional areaC, in square feet, of a river is given by the formula
,
where w is the width of the river and d is the depth. Both of these variables are measured in feet.The flow rate F, in cubic feet per minute, of the river is given by
,
where s is the speed of the river measured in feet per minute. A: Find a formula that gives the flow rate of a river in terms of the variables s, w, and d.B: Use the formula you found in part A to find the flow rate of a river with width 28 feet, a depth of 4 feet, and a speed of 34 feet per minute.
?
What will be an ideal response?
The question(s) that follow refer to the problem of finding the minimum spanning tree for the weighted network shown below.
Find the MST of the network using Kruskal's algorithm.
A. 
B. 
C. none of these
D. 
E. 
Solve.The product of two consecutive integers is 6 less than 6 times their sum. Find the integers.
A. 11, 12 B. 0, 1 or 12, 13 C. 0, 1 or 11, 12 D. 0, 1
Solve the problem.The temperature of water in a certain lake on a day in October can be determined by using the model 
where x is the number of feet down from the surface of the lake and y is the Celsius temperature of the water at that depth. Based on this model, how deep in the lake is the water 9 degrees? (Round to the nearest foot.)
A. 45 B. 12 C. 67 D. 30