81 by 9 means 81 times 9 ( or 81 x 9). The answer however would be 729
between 30 and 50 is approximately 40
<span>It is not clear whether the populations are proportional to the radii or to the areas, but I seem they are proportional to the areas, which is to say to the square of the radii. So China's population % should be (17%)(3.4/3.2)^2 = sorry I don't bring a calculator right now. But you can solve it easily.</span>
Everything separated by a '+' or '-' sign separates a term so in this expression there are 2 terms
Answer:
The present worth of the money is important to understand before dwelling into the true discount. Any money that is to be paid before the due date is cleared off for debt is known as the present worth of the money.
True discount can be understood in reference to this present worth. The difference between the present worth of the money and the amount is known as the true discount.
Also, it can be stated as the interest in any present worth for the amount of time the debt is due to be discharged
