-3/4×(-12)= ? solve please

Of the ones listed here, the factor that had the greatest impact on the eventual destruction of native americans' ways of life was the development of the a) automobile. b) highway. c) railroad. d) steamboat.

See attachment below and find the equivalent of tan(∠qsr)

Find the distance from the theater to the library. leave your answer in simplest radical form if necessary. 12 √12 74 √74