The Rule of 72 is a simple way to determine how long an investment will take to double given a fixed annual rate of interest. By dividing 72 by the annual rate of return, investors obtain a rough estimate of how many years it will take for the initial investment to duplicate itself. However the Rule of 72 is reasonably accurate for low rates of return.
A car travels 150 miles at a constant speed of 50 miles per hour. It then makes a 30-minute stop before continuing its journey at a constant speed of 60...
? = (5.8)2 + (8.9)2 + (4.7) 2 + 24.7% of 20
{84.03 + 39.99 – (168.12 ÷ 6.95 – 17.03 × 7.91)} = ?
29.88% of 3599.90 + 5/12 of 2399.81 – 34.81% of 1200.18 = ?
30.22% of (61.9 × 5.01) + 69.97 =?
√1295.98 × √2704 ÷ 899.97 + 1915.375 = ?
75.22 of 219.98% + 359.99 ÷ 18.18 = ?
(14.98% of 279.99) - 8.998 = √?
(363.89% of 224.98 – 319.86% of 134.94) ÷ ? = √(134.88 ÷ 15.25)
