| 551 | Moment |  |
| 552 | Period of simple pendulum (given length and local gravity) | -569s.png) |
| 553 | Length of simple pendulum (given period and local gravity) | -570s.png) |
| 554 | Einstein Mass Energy (mass energy equivalence) | -571s.png) |
| 555 | Mass in Einstein mass energy (given energy and speed of light) | -572s.png) |
| 556 | Local acceleration of gravity (given period and length of simple pendulum) | -573s.png) |
| 557 | Number of periods (present value,periodic payment,periodic interest rate or required rate of return) | -582s.png) |
| 558 | Present value of a future value (given periodic interest rate or rate of return,number of periods) | -583s.png) |
| 559 | Amount of money (given present value ,years and rate per year) | -584s.png) |
| 560 | Number of periods or years (present value,future value,periodic interest rate or required rate of return) | -585s.png) |
| 561 | Doubling time (given constant growth rate,periodic interest rate,periodic rate of return) | -586s.png) |
| 562 | Periodic interest rate or periodic rate of return or constant growth rate (given doubling time) | -587s.png) |
| 563 | Doubling time in consumption of a resource (given two measurements of a growing quantity and times) | -588s.png) |
| 564 | Start time (given doubling time in consumption of a resource,end time,measurements of a growing quantity) | -589s.png) |
| 565 | End time (given doubling time in consumption of a resource,start time,measurements of a growing quantity) | -590s.png) |
| 566 | Start quantity of resource (given doubling time in consumption of a resource,start time,end time,end quantity) | -591s.png) |
| 567 | End quantity of resource (given doubling time in consumption of a resource,start time,end time,start quantity) | -592s.png) |
| 568 | Present value of a future value or future sum (given discount rate or periodic interest rate or rate of return) | -593s.png) |
| 569 | Future value of a present value or present sum (given periodic interest rate,number of period) | -594s.png) |
| 570 | Number of periods,months or year (present value,future value,periodic interest rate or required rate of return) | -595s.png) |
| 571 | Periodic interest rate,rate of return or discount rate (given present value,future value,number of periods) | -596s.png) |
| 572 | Cumulative present value of future cash flows (discount rate,periodic interest rate,rate of return,periodic payment) | -597s.png) |
| 573 | n-th term of arithmtic series (given n, m-th term and initial term) | -598s.png) |
| 574 | Common difference of arithmtic progression(given m,n, m-th and n-th terms) | -599s.png) |
| 575 | Natural exponential function |  |
