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Math·Advanced Math·Nonlinear functions

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The number of cells of the bacteria Bacillus megaterium doubles every $25$ minutes during its growth period when placed in a medium of sucrose-salts in a controlled laboratory environment. If a sample of $980$ cells of Bacillus megaterium is placed in sucrose-salts in a controlled laboratory environment, which function $f$ best represents the number of cells of the bacteria $x$ minutes after the growth period begins, where $x$ is less than the number of minutes in the growth period?

A

$f(x)=980(1/2{)}^{x/25}$

B

$f(x)=980(2{)}^{x/25}$

C

$f(x)=980(1/3{)}^{x/25}$

D

$f(x)=980(3{)}^{x/25}$