143% Find
[5]
Question 4
Rachel travelled to America to visit her bother. She changed Namibian Dollars into
American dollars at a rate of N$7: US$1 and paid a commission of N$100. After
commission she received US$1 500.
Calculate how much Rachel paid in Namibian dollars, including Commission.[5]

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.