circumference, 2 * pi * r equalls 150.72 r equalls 150.72 * 7 / 2 * 22 equalls 23.97cm r equalls 23.97cm
1m equalls 100cm then 100m equalls 10000cm.
2z-3 equalls 0 and 2z equalls 3 and z equalls 3/2 therefore z = 1.5
10mm equalls 1cm and 2m equalls 200cm. The ratio is 1:200.
0.004
5.2 H equalls 60 * 5.2 equalls 312 minutes
32
x sq equalls 36 and x equalls plus or minus 6
5
45
1gram equalls 1/1000 kg. 1gram equalls 1/10^3 Kg. 1gram equalls 10^-3 kg. 10^-3 kg are there in a gram/EDIT: The simple answer would be - there are 0.001 kilograms in a gram !
1 light year equalls distance travelled by light in one year which equalls velocity of light * 1 year( 365.25 * 24(hour) * 60 * 60 ) which equalls value 9.467 * 10 power 15m.