For the curve r(t), write the acceleration in the form aTT + aNN.r(t) = 
(1 + t)3/2i + 
(1 - t)3/2j + 
tk
A. a = 
T
B. a = 
N
C. a = T + 
N
D. a = 
N
Answer: B
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Find the center and radius of the circle whose graph is shown. Write the standard form of the equation of the circle.
A. r = 4; (h, k) = (2, 4); (x + 2)2 + (y + 4)2 = 16 B. r = 4; (h, k) = (2, 4); (x - 2)2 + (y - 4)2 = 16 C. r = 2; (h, k) = (2, 4); (x - 2)2 + (y - 4)2 = 4 D. r = 2; (h, k) = (2, 4); (x + 2)2 + (y + 4)2 = 4
Determine whether the relation is a function. Give the domain and range.{(3, 12), (8, -6), (4, 7), (-2, 12), (10, -6)}
A. not a function; domain: {-6, 7, 12}; range: {-2, 3, 4, 8, 10} B. function; domain: {-2, 3, 4, 8, 10}; range: {-6, 7, 12}
Solve the problem. Round your answer to the nearest tenth unless indicated otherwise.Andrea's sleeping bag is designed for camping in temperatures of 30°C or warmer. For what Fahrenheit temperatures is her sleeping bag designed? Round to the nearest tenth of a degree.
A. 86.0° F or warmer B. 111.6° F or warmer C. 15.3° F or warmer D. 79.6° F or warmer
Convert to decimal notation.6.701 × 104
A. 268.04 B. 6701 C. 67,010 D. 670,100