At a science museum, Julia compares the length of a T-rex tooth and a crocodile tooth. The T-rex tooth is \( \frac{7}{12} \) foot long. The crocodile tooth is \( \frac{1}{4} \) foot long. What expression can be used to find how much longer the T-rex tooth is than the crocodile tooth? Choose 1 answer: (A) \( \frac{7}{12}-\frac{3}{12} \) (B) \( \frac{7}{16}-\frac{3}{16} \) (C) \( \frac{7}{16}-\frac{1}{16} \) (D) \( \frac{7}{12}-\frac{1}{12} \)

To determine how much longer the T-rex tooth is than the crocodile tooth, you need to subtract the length of the crocodile tooth from the length of the T-rex tooth. The T-rex tooth is \( \frac{7}{12} \) foot long and the crocodile tooth is \( \frac{1}{4} \) foot long. To perform this subtraction correctly, you should first convert \( \frac{1}{4} \) into twelfths, as \( \frac{1}{4} = \frac{3}{12} \). Thus, the expression becomes \( \frac{7}{12} - \frac{3}{12} \). So, the correct answer is (A) \( \frac{7}{12}-\frac{3}{12} \). Now you're all set for some dino-facts! Did you know that T-rex could grow up to 40 feet long? Imagine the tooth that comes with such a gigantic predator! Crocodiles, on the other hand, have teeth specifically designed to hold onto slippery prey like fish. Their teeth are a testament to evolutionary design, honed over millions of years to match their hunting style. Nature’s toothy wonders!