# Math 209

posted by
**Mari** on
.

THE FEDERAL DEBT D IN TRILLIONS OF DOLLARS HELD BY FOREIGN AND INTERNATIONAL INVESTORS x YEARS AFTER 1970 CAN BE MODELED BY

D(x) =

WHERE 15 ≤x≤ 40.

posted by
**Mari** on
.

THE FEDERAL DEBT D IN TRILLIONS OF DOLLARS HELD BY FOREIGN AND INTERNATIONAL INVESTORS x YEARS AFTER 1970 CAN BE MODELED BY

D(x) =

WHERE 15 ≤x≤ 40.