I can't send a transaction uses BitGo API
According to BitGo Documentation:


  amount    number  Yes Amount to be sent (in Satoshis), e.g. 0.1 * 1e8 for
  a tenth of a Bitcoin


https://bitgo.github.io/bitgo-docs/#send-coins-to-address

So, the amount should be passed as 0.1 * 1e8 = 10000000