Use the model A=Peʳᵗ or A=P(1+r/n)ⁿᵗ to the second power, where A is the future value of P dollars invested at interest rate r compounded continuously or n times per year for t years. If $10,000 is put aside in a money market account with interest compounded monthly at 2.2%, find the time required for the account to earn $2000. Round to the nearest month.