Solve the problem.If one earthquake is 100,000 times as intense as another, what is the difference in the Richter scale readings of the two earthquakes?
A. 5
B. 11.5
C. 4
D. 0.5
Answer: A
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Solve.A local pond can only hold up to 54 geese. Eight geese are introduced into the pond. Assume that the rate of growth of the population is 
= (0.0011)(54 - P)Pwhere t is time in weeks.Find a formula for the goose population in terms of t.
A. P(t) = 
B. P(t) = 
C. P(t) = 
D. P(t) = 
Use a definite integral to find an expression that represents the area of the region between the given curve and the x-axis on the interval [0, b].y = 
+ 7
A. - 
- 7b
B. 
+ 7
C. - 
- 7
D. 
+ 7b
Find the vertex, focus, and directrix of the parabola. Graph the equation.y2 = 8x
A. vertex: (0, 0)
focus: (0, 2)
directrix: y = -2
B. vertex: (0, 0)
focus: (2, 0)
directrix: x = -2
C. vertex: (0, 0)
focus: (0, 2)
directrix: y = -2
D. vertex: (0, 0)
focus: (-2, 0)
directrix: x = 2
Simplify.200
A. -1 B. 20 C. -20 D. 1