The position vector of a particle is r(t). Find the requested vector.The acceleration at t = 0 for r(t) = t2i + (8t3 - 3)j + 
k
A. a(0) = 2i + 
k
B. a(0) = 2i - 
k
C. a(0) = 2i - 
k
D. a(0) = 2i - 
k
Answer: B
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Convert as indicated.12 kg to milligrams
A. 1,200 mg B. 12,000,000 mg C. 0.012 mg D. 0.12 mg
Solve the equation.42 = -10x - 8
A. -5 B. 3 C. 64 D. 60
Write the function f as a set of ordered pairs. Give the domain and range of f.f(8) = 2, f(-6) = 2, f(-3) = 2
A. f = {(8, 2), (-6, 2), (-3, 2)}; D = {-6, -3, 8}; R = {2} B. f = {(8, -3), (-6, -3), (-3, -3)}; D = {-6, 2, 8}; R = {-3} C. f = {(2, -6), (2, -3), (2, 8)}; D = {2}; R = {-6, -3, 8} D. f = {(8, 2), (-6, 2), (-3, 2)}; D = {-6, -3}; R = {2, 8}
Find the circumference and area of the circle. Approximate each value to the nearest tenth when appropriate.r = 20 cm
A. C = 125.6 cm, A = 125.6 cm2 B. C = 62.8 cm, A = 251.2 cm2 C. C = 125.6 cm, A = 1256 cm2 D. C = 62.8 cm, A = 5024 cm2