Write the fraction as an equivalent fraction with the indicated denominator.
= 
A. 
B. 
C. 
D. 
Answer: B
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Find the unit tangent vector T and the principal unit normal vector N. r(t) = 
i + 
j + 3tk
A. T = 
(cos 0.8t)i - 
(sin 0.8t)j ; N = (-sin 0.8t)i - (cos 0.8t)j
B. T = 
(cos 0.8t)i - 
(sin 0.8t)j + 
k ; N = (-sin 0.8t)i - (cos 0.8t)j
C. T = 
(sin 0.8t)i - 
(cos 0.8t)j ; N = (-sin 0.8t)i - (cos 0.8t)j
D. T = 
(cos 0.8t)i - 
(sin 0.8t)j + 
k ; N = (-sin 0.8t)i - (cos 0.8t)j
Identify the equation as either an identity or not.
= 
A. Not an identity B. Identity
Find the slope of the line passing through the pair of points or state that the slope is undefined.(8, -2), (1, 2)
A. - 
B. - 
C. - 10
D. - 
Solve the problem.A stained glass window is composed of 20 triangular sections, each with sides 5, 7, and 6 in. Find the total area of the window (to the nearest square inch).
A. 98 in.2 B. 3478 in.2 C. 294 in.2 D. 15 in.2