Solve the problem.An experimental model for a suspension bridge is built. In one section, cable runs from the top of one tower down to the roadway, just touching it there, and up again to the top of a second tower. The towers stand 40 inches apart. At a point between the towers and 10 inches along the road from the base of one tower, the cable is 1 inches above the roadway. Find the height of the towers.
A. 6 in.
B. 3.5 in.
C. 4.5 in.
D. 4 in.
Answer: D
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Obtain a slope field and add to its graphs of the solution curves passing through the given points.y' = -y2 with (0, 1)
What will be an ideal response?
Translate the situation into mathematical language. You need not actually solve the problem.A commercial jet has been instructed to climb from its present altitude of 8000 feet to a cruising altitude of 30,000 feet. If the plane ascends at a rate of 2000 ft/min, how long will it take to reach cruising altitude?
A. Let t represent the number of minutes to reach cruising altitude; 
B. Let t represent the number of minutes to reach cruising altitude; 
C. Let t represent the number of minutes to reach cruising altitude; 
D. Let t represent the number of minutes to reach cruising altitude; 
Solve the problem.A fence is 639 meters long. It is to be cut into three parts. Two parts are the same length, and the third part is 21 meters longer than either of the other two. Find the length of each part.
A. 206 meters, 206 meters, 185 meters B. 206 meters, 206 meters, 227 meters C. 185 meters, 185 meters, 206 meters D. 227 meters, 227 meters, 206 meters
Use the properties of logarithms to find the exact value of the expression. Do not use a calculator.ln e
A. e
B. 36
C. 
D. 6