Simplify.i13
A. -1
B. 1
C. -i
D. i
Answer: D
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Find the square root.
A. 24 B. 7 C. Not a real number D. -7
Provide an appropriate response.Suppose the population of deer fluctuates over time. The population increases in the summer and decreases in the winter. It also varies over many years as well. If you looked at the graph of population versus time, would this relation be a function? Why or why not?
What will be an ideal response?
Solve the problem.A farmer's silo is the shape of a cylinder with a hemisphere as the roof. If the height of the silo is 70 feet and the radius of the hemisphere is r feet, express the volume of the silo as a function of r.
A. V(r) = ?(70 - r)r2 + 
?r3
B. V(r) = 70?r2 + 
?r3
C. V(r) = ?(70 - r) + 
?r2
D. V(r) = ?(70 - r)r3 + 
?r2
Solve the problem.Three trains - one eastbound, one westbound, and one northbound - leave a city at the same time. The speed of the northbound train is 30 miles per hour greater than the speed of the eastbound train. After 3 hours, the distance between the westbound train and the eastbound train is 210 miles. Twice the speed of the westbound train is 20 miles per hour more than the speed of the northbound train. Find the speeds of the three trains.
A. eastbound, 20 mph; westbound, 50 mph; northbound, 60 mph B. eastbound, 60 mph; westbound, 40 mph; northbound, 30 mph C. eastbound, 30 mph; westbound, 40 mph; northbound, 60 mph D. eastbound, 40 mph; westbound, 40 mph; northbound, 70 mph