The circumference of a particular circle is 18 cm. in square centimeters, what is the area of the circle? express your answer as a common fraction in terms of pi.

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.

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable