What is the simplified form of -9m^-2n^5*2m^-3n^-6

-9m^-2 * 2m^-3  =  -18m^-5
n^5 * n^-6 =  n^-1

combining these we get:-

-18m^-5 n^-1
which can also be written as
-18 / m^5 n

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post