To find the distance across a river a surveyor chooses points A and B , 50 m apart and a reference point C on the opposite side of the river. Approximate the distance, b , between A and C given that ?A = 54° and ?B = 77°.
(a) 54.6m
(b) 77.6m
(c) 64.6m
(d) 45.6m
(e) 85.6m
(c) 64.6m
Mathematics
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A. {-4}
B. 
C. {8}
D. {8, -4}
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Multiply. 
A. 217.16 B. 2.1716 C. 0.21716 D. 21.716
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Perform the indicated operation. Express the solution in scientific notation.(5 × 109) ? (4.3 × 106)
A. 2.15 × 1016 B. 2.15 × 1054 C. 21.5 × 1016 D. 215 × 1015
Mathematics
Evaluate the expression using the given values.
x = -8, y = 3
A. -5 B. -11 C. 5 D. 11
Mathematics