Josephine earned a 15% return on her investments last year. if the inflation rate that year was 4%, what is her real rate of return? a. 4% b. 11% c.15% d.19%

Can some one me, i’ve been asking for so long

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)