Find the regular expression r3 such that l(r3) = l(r1) ∩ l(r2), where:
• r1 = (ca)*a(c + b)*(ab + ca)*
• r2 = ((b + c)*a(c + a)(c + a)*(c + a + b)*)*

In the lab, which of the following displayed a list of all installed services and included a description of the service, the current state, and whether the service started automatically or manually? a. the services manager b. the applications summary c. the recommended services d. list the safe services list

What does 21 pilots middle aged name as a band 15 years prior to them naming their band 21 pilots?

The song about casey jones a railroad engineer who gives his life on the job would most likely gall under the folk song category of? a-work song b-nonsense song c-religious song d-ballad