Solve the problem.A 23-inch piece of string is cut into two pieces. One piece is used to form a circle and the other to form a square. How should the string be cut so that the sum of the areas is a minimum? Round to the nearest tenth, if necessary.
A. Circle piece = 12.9 in., square piece = 10.1 in.
B. Square piece = 0 in., circle piece = 23 in.
C. Square piece = 12.9 in., circle piece = 10.1 in.
D. Square piece = 5.8 in., circle piece = 5.3 in.
Answer: C
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Find the unit tangent vector of the given curve.r(t) = (6t cos t - 6 sin t)j + (6t sin t + 6 cos t)k
A. T = (-6 sin t)j + (6 cos t)k
B. T = (-sin t)j + (cos t)k
C. T = (6 cos t)j - (6 sin t)k
D. T = - 
(sin t)j + 
(cos t)k
Let U = {q, r, s, t, u, v, w, x, y, z}, A = {q, s, u, w, y}, B = {q, s, y, z}, and C = {v, w, x, y, z}. List the elements in the following set.
? B
A. {r, s, t, u, v, w, x, z} B. {q, r, s, t, v, x, y, z} C. {s, u, w} D. {q, s, t, u, v, w, x, y}
Complete.4.4 m = 
in. (Round to the nearest tenth.)
A. 158.4 B. 4.8 C. 11.2 D. 173.2
Write the first five terms of the geometric sequence with the given information.an = -5an-1; a1 = -5
A. -5, -10, -15, -20, -25 B. 25, -125, 625, -3125, 15,625 C. -5, -25, -125, -625, -3125 D. -5, 25, -125, 625, -3125