Ralph is sewing panels of fabric together to
make a drape for the set of a theater production.
The lengths of the panels are 1.9 meters,
2.5 meters, and 3.4 meters. What will be the
length of the drape made from these panels?

The length of the drape made from these panels will be 7.8 meters.

Since Ralph is sewing up three panels that are of different lengths each, the total length of the drape will be the sum of the lengths of all three panels.

The length of all three panels are 1.9 meters, 2.5 meters and 3.4 meters respectively. When we add all three lengths together, the sum total we get is 7.8 meters.

Total length of the drape: 1.9 + 2.5 + 3.4 = 7.8

If you want to look at it from an academic standpoint then the most valuable fossil is the Holotype; the single specimen that was used to describe a species.

Explanation:

Holotypes are priceless, as they are the single specimen that defines the species.