Answer each question appropriately.Suppose the velocity of a body moving along the s-axis is 
= 9.8t - 1.Is it necessary to know the initial position of the body to find the body's displacement over some time interval? Justify your answer.
A. Yes, knowing the initial position is the only way to find the exact positions at the beginning and end of the time interval. Those positions are needed to find the displacement.
B. Yes, integration is not possible without knowing the initial position.
C. No, displacement has nothing to do with the position of the body.
D. No, the initial position is necessary to find the curve s= f(t) but not necessary to find the displacement. The initial position determines the integration constant. When finding the displacement the integration constant is subtracted out.
Answer: D
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Divide. Leave the answer in factored form when appropriate.
÷ 
A. 
B. 
C. 
D. 
Refer to the weighted voting system 
and the Banzhaf definition of power. (The four players are P1, P2, P3, and P4.)Which players in the coalition {P1, P2} are critical?
A. P1 and P2 B. None of the players C. P2 only D. P1 only E. none of these
Four areas are newly designated as parks as shown below. Hiking trails are to be constructed so that each park is directly connected with each of the others. What is the least number of trails needed?
Add or subtract as indicated.-20 + 11 - 13 - (-7)
A. -29 B. -3 C. -25 D. -15