Solve the problem.A flare fired from the bottom of a gorge is visible only when the flare is above the rim. If it is fired with an initial velocity of 208 ft/sec, and the gorge is 672 ft deep, during what interval can the flare be seen? (h = -16t2 + vot + ho.)
A. 12 < t < 13
B. 0 < t < 6
C. 18 < t < 19
D. 6 < t < 7
Answer: D
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Solve the problem by integration.Find the volume of the solid that is generated by revolving the area bounded by 
and 
about the x-axis.
A. 
? ln (17)
B. 
? ln (4)
C. 
? ln (4)
D. 
? ln (17)
Three players (one divider and two choosers) are going to divide a cake fairly using the lone divider method. The divider cuts the cake into three slices (s1, s2, and s3).Suppose the choosers value the slices as follows:
Which of the following is a fair division of the cake?
A. Chooser 1 gets s3; Chooser 2 gets s2; Divider gets s1. B. Chooser 1 gets s2; Chooser 2 gets s1; Divider gets s3. C. Chooser 1 gets s2; Chooser 2 gets s3; Divider gets s1. D. Chooser 1 gets s1; Chooser 2 gets s2; Divider gets s3. E. none of these
Write the fraction in simplest form. Assume that all variable factors in the denominator are not equal to zero.- 
A. -1
B. - 
C. - 
D. - 
Solve for x.
= -16
A. 7 B. -7 C. -6 D. 6