ANSWERS TO QUESTIONS ON NUMBERS
1. (a) 1.234567 x 10^6
(b) 5.67 x 10^-7
(c) 3.45678 x 10^2
2. (a) 36650
(b) 0.000001009
3. (a) 3.7 x 10^4
(b) 1.0 x 10^-6
4. 3.5 x 10^3. 3.46 x 10^3 would also be acceptable.
5. (a) 117/4
(b) 29 1/4
(c) 29.3
6. (a) 8 x 10^3
(b) 5.12 x 10^8
(c) 1.28 x 10^8
(d) 1.6 x 10^10
7. (a) 8 x 32 x 10^6 = 2.56 x 10^8
(b) 16/8 K = 2 K = 2 x 10^3 = 2000. (For such small numbers it is easy to be exact and say 2048.)
8. (a) 37 x 10^12 = 3.7 x 10^13
(b) 0.034 x 10^3 = 34
........