Solve the problem.For the vectors u and v with magnitudes 
= 3 and 
= 8, find the angle ? between u and v which makes 
= 2
A. 41.81°
B. 48.19°
C. 67.98°
D. 75.52°
Answer: B
Mathematics
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Multiply and simplify any radicals in your answer. Assume that all variables represent positive real numbers.(
+ 3)(
- 3)
A. 2
B. -4
C. 5 - 2
D. 14
Mathematics
Find the tangential and normal components of the acceleration.r(t) = 
i + 
j + 12tk
A. a = 25T + 25N
B. a = 
T
C. a = 
N
D. a = T + 25N
Mathematics
Provide an appropriate response.Evaluate x2 - x for the value of x satisfying 18(x - 9) + 81 = 18x - 9(18 - x).
A. -8 B. 90 C. 72 D. 10
Mathematics
In a right triangle, find the length of the side not given. Let c represent the length of the hypotenuse. Give an answer to the nearest tenth if necessary.b = 7 yd, c = 14 yd
A. a = 7 yd B. a ? 12.1 yd C. a ? 9.9 yd D. a ? 4.6 yd
Mathematics