The most commonly used auxiliary storage device(s) is/ are . a.
floppies and tapes
b.
a filing cabinet
c.
hard disks and floppies
d.
tapes and hard disks

Hypothesis: volumes of both figures are equal.the volume of  figure 1 is: .the volume of figure 2 is: .since , you can conclude that and . so, .volumes of figures are equal only when an angle in the basis is right (then figures will be the same), in another cases volume of figure 1 is less than volume of figure 2.the hypothesis was not correct in all cases.

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Answerwpa2;