Question 1158226
If P is the amount the couple invests when their baby is born, the money will have accumulated to {{{P*1.0225^(18*4)}}}. We set this value to $42,000. {{{P*1.0225^72=42000}}} Dividng both sides by {{{1.0225^72}}}, we get {{{P=42000/1.0225^72}}}. If you don't round until the end, we have {{{P=8462.34}}}. Check: *[invoke future_value 8462.34,9,4,18] <br/> Click <a href=future_value.solver>here</a> for the solver above.