Answer: 18 years
Step-by-step explanation:
The Rule of 72 is a way to calculate how long it will roughly take for an investment to double in size.
It works by dividing 72 by the interest rate as a whole number:
= 72/ interest rate
= 72 / 4
= 18 years
Answer:
645 m 86 cm
Since 49 cm is greater than 35 cm, we must borrow 100 cm from 800 m, obtaining 799 m 135 cm. Subtracting 154 m 49 cm from that, we get: