Hi all,

i have find this exercise in internet and try solve it but cant, pls help me.

Thanks

1.Given A = 3.9 after rounding. Find the range of real value for A before rounding if A has been round to

(i) 1 decimal places.

(ii) 2 significant figures

2.Ifx= 2.0,y= 3.0 andz= 4.0, all are corrected to 1 decimal places, calculate the absolute and relative error for

(i) 2x+y

(ii) $\displaystyle \frac{x+z}{y}$

3.The position of nine trees which are to be planted a long the sides of a road, five on the north side and four on the south side.

If there are 3 figs, 4 prunes and 2 magnolias, find the number of different ways in which these could be planted assuming that the trees of the same species are identical.