Find the first term and the common difference.8, 12, 16, 20, . . .
A. a1 = 8, d = 4
B. a1 = 8, d = 20
C. a1 = 8, d = 12
D. a1 = 8, d = -4
Answer: A
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A grand tour of four cities begins at city A and makes successive stops at cities B, C, and D before returning to city A. If the cities are located as shown in the following figure, find the total distance covered on the tour.
?
?
?
A. 2,300 mi B. 2,200 mi C. 2,100 mi D. 2,000 mi E. 1,600 mi
The growth rate of the bacterium, a common bacterium found in the human intestine, is proportional to its size. Under ideal laboratory conditions, when this bacterium is grown in a nutrient broth medium, the number of cells in a culture doubles approximately every 20 min. If the initial cell population is 10, determine the function Q(t) that expresses the exponential growth of the number of cells of this bacterium as a function of time t (in minutes). How long will it take for a colony of 10 cells to increase to a population of 1 million? If the initial cell population were 100, how would this alter the model? ?
A. 
B. 
C. ?
D. ?
Determine if the graph of the function is concave up or concave down.y = 4(x + 1)2 + 2
A. Concave down B. Concave up
Provide the proper response.What is true when the marginal cost and average cost are equal?
What will be an ideal response?