Find the product.(8a + 13c)(8a - 13c)
A. 64a2 - 169c2
B. 64a2 + 208ac - 169c2
C. 64a2 - 208ac - 169c2
D. 8a2 - 13c2
Answer: A
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Find the angle between u and v in radians.u = -2i - 6j, v = 7i + 6j + 8k
A. -0.70 B. 1.58 C. 1.84 D. 2.28
Write the number in words.9983
A. nine hundred nine, eighty-three B. ninety-nine thousand, eighty-three C. nine thousand, nine hundred eighty-three D. nine hundred thousand, nine hundred eighty-three
Solve the application. Write the following number in scientific notation.The population of a small country is 5,068,000.
A. 5.068 × 104 B. 5.068 × 10-5 C. 5.068 × 105 D. 5.068 × 106
Solve.The pitch of a screw is the distance between threads. With each complete rotation of the screw, it goes in or out a distance equal to its pitch. How far will a screw with a pitch of 
in. go into a piece of wood when it is turned 10 complete rotations clockwise?
A. 
in.
B. 
in.
C. 
in.
D. 
in.