A biologist finds that the population of a certain type of bacteria doubles each half-hour. An initial culture has 60 bacteria.
How long will it take for the number of bacteria to reach 122,880?
A) 5.5 hours B) 6 hours C) 6.5 hours D) 7 hours
B) 6 hours
Mathematics
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Evaluate.
3
A. - 
B. - 
C. - 
D. - 
Mathematics
Convert the equation to the standard form for a hyperbola by completing the square on x and y.x2 - y2 + 6x - 2y + 7 = 0
A. (y + 3) 2 - (x + 1) 2 = 1
B. (x + 3) 2 + (y + 1) 2 = 1
C. (x + 3) 2 - (y + 1) 2 = 1
D. 
- 
= 1
Mathematics
Solve the problem.Joan can mow a 10-acre field in 5 hours. How long would it take her to mow a 3.8-acre field?
A. 1.9 hr B. 4.9 hr C. 3.9 hr D. 0.4 hr
Mathematics
Write as the sum and/or difference of logarithms. Express powers as factors.log3
A. log3x - 3
B. - 3log3x
C. 
log3x - 3
D. 9 - 
log3x
Mathematics