Find the exact value of the expression.csc 
A. undefined
B. 0
C. -1
D. 1
Answer: C
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Evaluate the line integral along the curve C.
ds, C is the curve r(t) = (-4 - t)i + 2tj - 2tk , 0 ? t ? 1
A. 18 B. - 6 C. - 2 D. 6
Solve the problem.Ultraviolet solar radiation (UV) is strongly absorbed by ocean water. The intensity of the UV at a particular depth can be calculated using the equation I = I0e-0.3d, where d is the depth in centimeters (cm), I0 is the intensity at the surface, and I is the intensity at depth d. Find the depth at which the intensity is 15% of its value at the surface. Round to the nearest tenth when necessary.
A. 2.7 cm B. 6.3 cm C. 19 cm D. 9.5 cm
Find any intercepts. Then graph the linear equation.-x + 4y = 16
A. x-int: -16; y-int: 4
B. x-int: -4; y-int: 4
C. x-int: -16; y-int: -4
D. x-int: -16; y-int: 16
Find the real solutions of the equation.2(x + 1)2 + 13(x + 1) + 20 = 0
A. {2, 3}
B. {- 
, -5}
C. {- 
, -4}
D. {- 
, -5}