Solve the problem.Two bacteria are placed in a petri dish. The population will double every day. The formula for the number of bacteria in the dish on day t is N(t) = 2(2)t, where t is the number of days after the two bacteria are placed in the dish. How many bacteria are in the dish five days after the two bacteria are placed in the dish?
A. 9
B. 64
C. 50
D. 20
Answer: B
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Solve the problem.How long will it take for the population of a certain country to double if its annual growth rate is 2.2%? (Round to the nearest year.)
A. 14 years B. 32 years C. 1 year D. 91 years
Solve the problem.The accompanying figure shows the graph of y = -x2 shifted to a new position. Write the equation for the new graph.
A. y = -(x + 2)2 + 3 B. y = -(x - 3)2 + 2 C. y = -(x - 3)2 - 2 D. y = -(x + 3)2 + 2
Evaluate the integral.
A. 11.1 B. 4.07 C. 8.07 D. -1.93
Solve the problem.The average total sales of individuals in the sales department at a paper company has decreased approximately linearly from $154 thousand in year 1 to $127 thousand in year 5. Let s be the average total sales (in thousands of dollars) at t years. Find an equation of a linear model to describe the data.
A. s = 6.75t + 147.25 B. s = -6.75t + 147.25 C. s = -6.75t + 160.75 D. s = -6750t + 154,000