(a)[1]
Write $0.000186$ in standard form by expressing it as a power of ten.
(b(i))[1]
Given $s = 1.3 \times 10^7$ and $t = 8 \times 10^8$, with each value already expressed in standard form, find $t^2$.
(b(ii))[2]
Given $s = 1.3 \times 10^7$ and $t = 8 \times 10^8$, with each value already in standard form, find $t - s$.