Find v ? u.v = 2i + 2j and u = 8i + 4j
A. 10i + 6j
B. 24
C. 8
D. 16i + 8j
Answer: B
Mathematics
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Find the mean of the set of data. Round to the nearest tenth.13, 9, 1, 1, 7, 10, 13, 5, 12
A. 7.9 B. 7.8 C. 10.8 D. 8.0
Mathematics
Solve.The time T necessary to make an enlargement of a photo negative varies directly as the area A of the enlargement. If 72 seconds are required to make a 3-by-4 enlargement, find the time required for a 4-by-8 enlargement.
A. 160 sec B. 256 sec C. 224 sec D. 192 sec
Mathematics
Suppose the angle formed by the line y = 4x and the positive x-axis is ?. Find the tangent of ?.
?
?
A. ?
B. 4
C. 5
D. -4
E. 
Mathematics
Solve the equation.x2 = -4
A. ±
B. ±2
C. ±i
D. ±2i
Mathematics