Graph the circle with radius r and center (h, k).r = 5; (h, k) = (0, 4) 
A. 
B. 
C. 
D. 
Answer: A
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The number of bacteria present at a given time under certain conditions is given by the equation Q = 4,000e 0.01t, where t is expressed in minutes. How many bacteria are present at the end of 45 minutes?Please round the answers to the nearest whole.
A. Q = 6,344 bacteria B. Q = 6,273 bacteria C. Q = 6,287 bacteria D. Q = 6,298 bacteria E. Q = 6,282 bacteria
Solve the problem.For a charter flight, an airline charges a fare of $200 per person plus $4 per person for each unsold seat on the plane. If the plane holds 100 passengers and if x represents the number of unsold seats, find an expression for the total revenue received for the flight and find the maximum revenue.[Hint: To find an expression for the total revenue, multiply the number of people flying, 
by the price per ticket.]
A. R(x) = (100 - x)(200 + x) maximum revenue: $22,500 B. R(x) = (100 - x)(200 + 4x) maximum revenue: $22,500 C. R(x) = 204(100 - x) maximum revenue: $20,400 D. R(x) = (100 - x)(200 + 4x) maximum revenue: $18,000
Provide an appropriate response.Solve the inequality: 5 + 2(x + 2) ? 7
A. x ? -1
B. x ? 1
C. x ? 0
D. x ? 
Solve the variation problem.The weight of an object on the moon varies directly as its weight on earth. A person who weighs 123 lb on earth weighs 24.6 lb on the moon. How much would a 186-lb person weigh on the moon?
A. 37.2 lb B. 0.2 lb C. 930 lb D. 333.6 lb