The base of a solid S is the region bounded by the curve y=e^-x, the x-axis, the y-axis, and the line x=1. Cross sections perpendicular to the x-axis are equilateral triangles. Determine the exact volume of solid S.

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.

0.038

step-by-step explanation:

113.1

step-by-step explanation:

v=4

3πr3=4

3·π·33≈113.09734

the answer is c. ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀