In the figure, $\angle abc$ and $\angle adb$ are each right angles. Additionally, $ac = 17. 8$ units and $ad = 5$ units. What is the length of segment $db$?.

In the image, layer a is the topmost layer. layer c contains fossils from the precambrian era. layer b contains dinosaur fossils, and layer a contains fossils of mammals. which two statements are supported by this evidence? 1. mammals lived before the precambrian era. 2. dinosaurs and mammals existed in the precambrian era. 3. dinosaurs evolved after precambrian organisms. 4. precambrian organisms evolved after dinosaurs. 5. precambrian organisms were the first life-forms to become fossilized, according to this sample.

Darwin studied two different types of tortoises on the galapagos islands. sort the characteristics based on which tortoise they describe.

What does the first stage of a multistage rocket do?