Page Velocities and Acceleration Acceleration due to gravity g .8066 m/s round to .8 m/s knot .51 m/s Angular Measure revolution 6 degrees right ‐ angles degree minutes minute seconds radian 7’ 5” or approx 7. Base of Napierian Logarithms .718 Log e In . × log INTEREST FORMULAS AND TABLES i interest rate per period n number of interest periods P a present sum of money or the principal F a sum of money at the end of n periods A an end of period payment for the next n periods often called annual or monthly payment   n F P +i n F P 1+i n i A F 1+i ‐ n 1+i ‐ F A i n n i(1+i A P 1+i ‐ n n 1+i ‐ P A i(1+i n n i(1+i A P ‐ L 1+i ‐ Where P is purchase cost and L is salvage value