Simplify this expression: 13 + (–12) – (–5) = ?
a. –6
b. 30
c. 6
d. –30

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Which fraction is equal to 1hole and 2/5? a.3/5 b.75 c.57 d.73

Find the volume of the solid obtained by rotating the region enclosed by the curves y=1x and y=7^-x about the x-axis. (use symbolic notation and fractions where needed.) volume =