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The Cassegrain reflector needs a parabolic concave main mirror and a smaller, convex secondary mirror to reflect light back through a hole in the primary.

Which of the following is NOT a reason to use a reflecting telescope rather than a refractor?

According to Chapter 18, what two things are needed to correctly quote a source? Select all that apply.

According to Chapter 3, what is the usual length for an introductory paragraph? 

How can an owner of a small business reduce risk when segregation of duties is not feasible because the cost exceeds the benefits?

Which system is used by the storefront cashiers to check out the customer’s purchases?

A person’s or group’s state of mind, level of enthusiasm, and amount of involvement with work and with life is their MORALE.

1. The bearing from the Pine Knob fire tower to the Colt Station fire tower is N 65° E, and the two towers are 30 kilometers apart.  A fire spotted by rangers in each tower has a bearing of N 80° E from Pine Knob and S 70° E from Colt Station.  Find the distance of the fire from each tower.    Distance of the fire from Pine Knob: [pine] km Distance of the fire from Colt Station: [colt] km   **Round your answers to the nearest hundredths please. 

The theory that people live up to expectations-if people believe they can do a job, they usually can. If they don’t, they usually can’t.

Due to the greenhouse effect, ultraviolet astronomy must be done from space.