A population changes with time. Its level after t years is given by the function 
. Over a certain period, the population is growing. What can be said about 
over this period?
?
A. is positive.
B. is negative.
C. is zero.
D. is linear.
Answer: A
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Find a minimum spanning tree for the graph.
A. 
B. 
C. 
D. 
Solve the problem.For a cone, the formula R = 
1/2describes the relationship between the radius R of the base, the volume V, and the height h. Find the volume of a cone if its radius is 7 inches and its height is 5 inches. (Use 3.14 as an approximation for ?, and round to the nearest tenth.)
A. 256.4 cubic in. B. 36.6 cubic in. C. 51.3 cubic in. D. 2307.9 cubic in.
Solve.A company has 63,000 employees. Of these, 
drive alone to work, 
car pool, 
use public transportation, 
cycle, and the remainder use other methods of transportation. How many employees use each method of transportation?
A. Drive alone: 2,100; car pool: 10,500; public transportation: 9,000; cycle: 7,000; 
B. Drive alone: 21,000; car pool: 10,500; public transportation: 9,000; cycle: 7,000; 
C. Drive alone: 21,100; car pool: 10,500; public transportation: 8,900; cycle: 7,000; other: 1000
D. Drive alone: 21,000; car pool: 10,500; public transportation: 9,000; cycle: 7,000; 
State a sample space S with equally likely outcomes for the given experiment.A box contains 3 blue cards numbered 1 through 3, and 4 green cards numbered 1 through 4. List the sample space of picking a blue card followed by a green card.
A. S = {12} B. S = {(1, 1), (1, 2), (1, 3), (1, 4), (2, 1), (2, 2), (2, 3), (2, 4), (3, 1), (3, 2), (3, 3), (3, 4)} C. S = {7} D. S = {(1, 1), (1, 2), (1, 3), (2, 1), (2, 2), (2, 3), (3, 1), (3, 2), (3, 3), (4, 1), (4, 2), (4, 3)}