Marie is logging the number of radioactive isotopes she observes every minute. She has determined her function to be f(x) = −4x + 120.

Based on the situation above, describe any necessary restrictions to the domain and range. Provide justification for the restrictions.

Question

Marie is logging the number of radioactive isotopes she observes every minute. She has determined her function to be f(x) = −4x + 120.

Based on the situation above, describe any necessary restrictions to the domain and range. Provide justification for the restrictions.

anonymous · Answer

Can you detect negative isotopes?

anonymous · Answer

I'm literally about to pass out from exhaustion and my brain is no longer in working condition.... so please explain this as simply as possible.

anonymous · Answer

If you can't detect negative isotopes, your f(x) value must always be equal to or greater than 0. Hence what restrictions do we have on x (i.e the domain) ?

anonymous · Answer

that it must be positive

anonymous · Answer

No, f(x) must always be positive. If f(x) > or = 0 , then what must x be restricted to ?

anonymous · Answer

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