Simplify and write the answer using scientific notation. Use the correct number of significant digits.
A. 8.4 × 1010
B. 8.4 × 106
C. 8.4 × 10-8
D. 1.6 × 10-6
Answer: C
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Express the trigonometric function in terms of the same function of a positive acute angle.tan 127°
A. -tan 8° B. tan 8° C. tan 53° D. -tan 53°
Find the coordinates of the midpoint of the line segment PQ.P(7x, 8), Q(8x, 1)
A. (x, 7)
B. 
C. 
D. (15x, 9)
Solve the problem.Find a vector v whose magnitude is 5 and whose component in the i direction is four times the component in the j direction.
A. v = 
i + 
j
or
v = - 
i - 
j
B. v = 
i + 
j
or
v = - 
i - 
j
C. v = 
i - 
j
or
v = - 
i + 
j
D. v = - 
i + 
j
or
v = 
i - 
j
Solve the problem.The width of a rectangular property is 6 kilometers less than twice its length. If its area is 216 square kilometers, find the dimensions of the property.
A. length = 9 km, width = 12 km B. width = 12 km, length = 18 km C. length = 12 km, width = 18 km D. length = 3 km, width = 72 km