What principal, at 4 per cent, interest, will amount to 1643 dollars in 21 years? Ans. 121. 5. What principal, at 6 per cent., will amount to 202 dollars in 4 years ? Ans. 160. 6. At what rate of interest, will 400 dollars amount to 569^, in 9 years ?

Title | : | A TREATISE OF PLANE TRIGONOMETRY |

Author | : | JEREMIAH DAY, D.D. LL.D., |

Publisher | : | - 1855 |

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