Do the ratios 8/50 and 4/10 form a proportion

Every rhombus is a square. true false

Organisms that live in the alpine and taiga biomes have developed unique adaptations that aid in their survival. the douglas-fir is a conifer tree that grows in the taiga biome. it has an average height of about 70 feet, and its wood is an important source of lumber.

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup