Asolid object was sliced to form two new objects each of the two new objects had a circular base which shape could not have been the original object cone cylinder prism sphere

prism.

Step-by-step explanation:

Suppose you cut the objects horizontally.

The cylinder already has a circular base, so when you cut it you will have two cylinders, both with a circular base.

The sphere when cut in a horizontal line, will lead to two halves with a circular base of the same surface.

A cone already has a circular base, so when you cut it horizontally, you will end with a smaller cone (the top part that you cut) and the bottom part, that already had a circular base.

The prism has not circular sections, so it is kinda impossible to get a circular section when you cut a prism, then the correct option is a prism, this is because this is the only shape that has some faces confirmed by parallelograms.

2y+y=5

add 2y and y

ending amount = beginning amount / (2^n)

where "n" = number of half-lives (or elapsed time / half-life)

ending amount = 50 mg / (2 ^10 / 5.3)

ending amount = 50 mg / (2 ^ 1.8867924528)

ending amount = 50 m / 3.6981210597

ending amount = 13.5203794557 mg

or about 13.5 mg remain

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