Given: line segment rs is perpendicular to line segment ab, line segment cb is perpendicular to line segment ac. prove: triangle bsr is similar to triangle bca

In the rectangle below ac=30 units what is de

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

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?