True. Integers are whole numbers both positive and negative. Natural numbers are only whole positive numbers. So it is true whenever you are dealing with positive integers and it is false when you are dealing with negative integers.
Answer:
R = 450%/year
Equation:
r = (1/t)(A/P - 1)
Converting r decimal to R a percentage
R = 4.5 * 100 = 450%/year
Width times length equals area so 13 times 17 equals 221 and multiply that by the price of each square inch so he should charge $66.30