In ∆abc, m∠acb = 90°, m∠a = 40°,
cd (d ∈ab ) is a segment perpendicular to the side ab . find m∠dbc and m∠bcd.

Acylinder has volume 45π and radius 3. what is it’s height?

The customer price index(cpi), which measures the cost of a typical package of customer goods,was 208.8 in 2011 and 244.1 in 2016.let x=11 corresponding to the year 2011 an estimate to cpi into 2013 and 2014. assume that the data can be modeled by a straight line and the trend to continue idenfinitely.use data points to find such a line and then estimate the requested quantities

60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums. what is the probability that the applicant who gets the job plays drums or guitar?