Factor the special products.9k2 - 25m2
A. (3k - 5m)2
B. (3k + 5m)(3k - 5m)
C. (3k + 5m)2
D. prime
Answer: B
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The graph of a function f is given. Use the graph to answer the question.For what numbers x is f(x) = 0?
A. -6, 7, 10 B. (-6, 7) C. (-10, -6), (7, 10) D. -6
Solve the problem.A pendulum bob swings through an arc 80 inches long on its first swing. Each swing thereafter, it swings only 71% as far as on the previous swing. What is the length of the arc after 10 swings? Round your answer to two decimal places, if necessary.
A. 511.2 inches B. 1.85 inches C. 2.6 inches D. 3.67 inches
Simplify the expression. If the expression contains any variables, assume that they represent positive real numbers. Write your answer with only positive exponents.
A. 9
B. 
C. 97
D. 9x
Solve the problem.Sunlight is absorbed by water and so, as one descends into the ocean, the intensity of light diminishes. Suppose that at each depth, going down one more meter causes a 15% decrease in the intensity of sunlight.(a) Write the difference equation for yn, the intensity of the light at a depth of n meters.(b) If the intensity of the light at the surface is 500 units, what is the intensity of the light at a depth of two meters?(c) Graph the difference equation. 
What will be an ideal response?