Function Transformation Question?

One of the factors that doctors use to determine the age of a fetus is the crown-to-rump length (CRL) measured during an ultrasound. A recently study determined that the average CRL, in millimeters, of a fetus with gestational age x days could be represented by the function f(x)=0.01634(x-26.643)^2. This formula applies between 6 to 15 weeks of gestation. 

a.) What are the restrictions on the domain of this function?

The answer is 42<x<105, but I don't understand how they got that answer.

1 Answer

  • 4 weeks ago

    Nothing in the equation itself would limit it to 42 through 105 days.

    The only thing that does is the fact that it's used from 6-15 weeks.

    Convert those weeks to days and you get 42-105 days.

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