Solve the problem.Find the total surface area of a regular square pyramid with base edges 1.67 cm and lateral edges 
A. 15.8 cm2
B. 16.1 cm2
C. 15.5 cm2
D. 12.8 cm2
Answer: C
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Solve the problem.Suppose there are two low-frequency sound waves with similar frequencies. Let 
and 
model the two tones where t is time measured in seconds. Write the sum 
as a product of two trigonometric functions, and determine the frequency of the beats.
A. no beats 0.006 cos (83?t) cos (83?t) B. no beats 0.006 cos (41.5?t) cos (41.5?t) C. 1.5 beats per second 0.006 cos (41.5?t) cos(1.5?t) D. 3 beats per second 0.006 cos (83?t) cos (3?t)
First use front-end rounding to write an estimate of the answer, and then multiply fully to obtain an exact answer.EstimateProblem
?
A. Estimate: 280, exact: 276.9 B. Estimate: 281, exact: 277.9 C. Estimate: 28, exact: 27.69 D. Estimate: 279, exact: 275.9
Find the vertex, focus, and directrix of the parabola. Graph the equation.(y - 1)2 = (x - 3)
A. vertex: (-3, -1)
focus: (-3, -0.75)
directrix: y = -1.25
B. vertex: (3, 1)
focus: (3, 1.25)
directrix: y = 0.75
C. vertex: (-1, -3)
focus: (-0.75, -3)
directrix: x = -1.25
D. vertex: (3, 1)
focus: (3.25, 1)
directrix: x = 2.75
Determine the coordinates of the indicated point on the graph. 
J
A. (-3, 0) B. (3, 0) C. (0, 3) D. (0, -3)