Solve the problem.A student is taking a standardized test consisting of multiple choice questions for which there are five options for each question. Five points are awarded for each correct answer, but the student loses 2 points for an incorrect answer. Questions left blank neither receive nor lose points. Is it in the student's best interest to guess?
A. Yes
B. No
Answer: B
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Find the area.Find the area enclosed by the ellipse x = 6 cos t, y = 5 sin t, 0 ? t ? 2?.
A. 36?2 + 25? B. 30?2 C. 60? D. 30?
Find the unit tangent vector T and the principal unit normal vector N. r(t) = (cosh t)i + (sinh t)j + tk
A. T = - 
(tanh t sech t)i + 
j + 
(sech t)k; N = (-sech t)i - (tanh t)k
B. T = - 
(tanh t)i + 
j + 
(sech t)k; N = (-sech t)i - (sinh t)k
C. T = 
(tanh t)i + 
j + 
(sech t)k; N = (sech t)i - (tanh t)k
D. T = 
(tanh t sech t)i + 
j + 
(sech t)k; N = (sech2 t)i - (sinh t)k
If n is a natural number, then 10-n = 
. Negative powers of 10 can be used to write the decimal part of Hindu-Arabic numerals in expanded form. Express the expanded form as a Hindu-Arabic numeral.(8 × 103) + (7 × 102) + (3 × 101) + (8 × 1) + (3 × 10-1) + (6 × 10-2) + (8 × 10-3)
A. 8,738,368 B. 873.8368 C. 87383.68 D. 8738.368
Find the absolute value of the complex number.z = -23
A. 0 B. 23 C. -23 D. 46