If x=2, y=3 and z=1 then find the value of
1/2 x + 3/4 y

Which of the following answers is 5/25 simplified? 1/5 5/5 2/5 1/25

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)

In what organelle does photosynthesis take place?