19.1 should be your answer
A. 4.898979486
b. 7.416198487
c. 8.544003745
i think at least
By the process of elimination, it is already not the last 2, so it is 50/50 chance to get it correct, but if you know how to add, you can figure out that 1 million per year in 5 years means that it is 12 million + 5 million, which is equal to 17 million and not 14,500,000. This brings it down only to 500,000$ salary increase per year
1/100 of a metre, as 100cm make 1m
