sorry missed out a bit of infomation n=0.13
using the equation VT(power n) = C
cuttin speed tool life
180m/min 30
250m/min 12
v1=180
t1=30
v2=250
t2=12
logv1+logt1=log c
logv2+logt2=log c
log180+nlog30
log250+nlog12
2.255+n1.477
-2.397+n1.079
=-0.142+n-0.602=0
n=0.602 = 0.142
0.142
0.602
=0.235
180+0.235x1.477=180.3470
is this the end of the equation?