Radioactivity can be said to be a physics or chemistry topic which involves calculating the value of a substance after a period of time using power of exponents and log.
Projectile motion can be well explained using trigonometry in mathematics and this makes it easier during calculations.
This is another non-math topic where the knowledge of a math topic will come in handy in order to explain it.
In radioactivity, we are either calculating the half-life of a sample, the amount of a sample left after a period of time or even the the disintegration constant of the sample. This is made possible through the knowledge of exponential increase or decrease as well as logarithmic functions.
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