SAT Math Practice Question #27872 - SATify | SATify

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SAT Math Practice Question #27872 - SATify | SATify

#27872

exponents

sequences and series

medium

90 sec

A radioactive substance has a half-life of 30 minutes. If you start with a sample of 1024 grams, after how many half-life periods will the amount of the substance remaining first be less than 1 gram?

A.

$9^{th}$

B.

$1 0^{th}$

C.

$1 1^{th}$

D.

$1 2^{th}$

E.

$1 3^{th}$