Find the amplitude, period or phase shift.Find the amplitude of y = -5 cos (4x - ?).
A. -20
B. 5
C. 4
D. ?
Answer: B
Mathematics
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Assuming that the equations define x and y implicitly as differentiable functions 
find the slope of the curve 
at the given value of t.2x + 4x3/2 = t3 + t, y(t + 1) - 4t
= 25, t = 0
A. 10
B. - 
C. -5
D. -10
Mathematics
Provide an appropriate response.A shadow cast by a building is 50 ft long when the angle of inclination of the sun is 30°. How tall is the building? Round to the nearest foot.
Fill in the blank(s) with the appropriate word(s).
Mathematics
Determine the number of triangles that can be drawn with the given data.a = 30, b = 61, A = 71°
A. 2 B. 0 C. 1 D. 3
Mathematics
Multiply.
2
A. 81z2 + 2z
B. 81z2 + 2z + 
C. 
z2 - 2z + 81
D. 81z2 - 
z - 
Mathematics