Solve the problem. Do not use a calculator.Find the maximum y-value on the graph of y = - 8x2 - 112x - 398.
A. 7
B. -7
C. 0
D. -6
Answer: D
Mathematics
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Find a1, d, an, n, or Sn for the arithmetic sequence, as instructed.a1 = 47, d = 6, an = 221; Find n.
A. 38 B. 30 C. 29 D. 28
Mathematics
Provide an appropriate response.Write the set -7 ? x < -2 using interval notation.
A. (-?, -7) ? [-2, ?) B. (-?, -7] ? (-2, ?) C. (-7, -2] D. [-7, -2)
Mathematics
Find the principal unit normal vector N for the curve r(t).r(t) = (3 sin t)i + (3 cos t)j + 4k
A. N(t) = (-sin t)i + (cos t)j B. N(t) = (sin t)i + (cos t)j C. N(t) = (-sin t)i - (cos t)j D. N(t) = (-cos t)i - (sin t)j
Mathematics
In the figure, m
= 90° and m
= 27°. Find the length of b correct to nearest tenth of a unit.
A. 9.8 B. 10.7 C. 10.9 D. 11.2
Mathematics