Suppose a firm has a fixed cost of $20,000 and a $5 variable cost for every unit it produces.

‘all monkeys have tails’ is an absolute statement. t or f

The graph shows the populations of two species over time. which type of symbiotic relationship does the graph represent? a. commensal b. mutualistic c. parasitic d. parent-offspring e. predator-prey

Earth takes in thermal energy from the sun in a process called . sunlight strikes earth’s surface at different angles. this angle is called the angle of . btw its