True!!
Bcoz integer numbers are positive and negative whole numbers. Rational numbers ALSO include fractions and decimals...... eg: 10 is an integer which is also a rational number. but keep in mind all rational numbers are not integers. eg 10.1 is a rational number but since integers are only whole positive or negative numbers, it is not an integer.
Refer to the figure shown below.
When the point Y (-1,-3) is rotated 180 about O, it sweeps a semicircular arc to the point Y' (1,3).
The radius of the semicircle is

Answer: 3. Y' (1,3)
for all positive integers (like n = 1, 2 or 5) the conjecture holds true but not for negative values like if n = -3 then the result will not become positive, because:

which is not positive.
Length = L
New length = L+0.1L= 1.1 L
Width = W
New width = W - (W/100)p= W-pW/100= (100W-pW)/100=W(100-p)/100
Area =A = LW
New area = A - 0.12A = 0.88A
New area = new width*new length = 1.1L*W(100-p)/100 = 1.1A(100-p)/100
New area = 0.88A
New area = 1.1A(100-p)/100
1.1A(100-p)/100 = 0.88A
1.1(100-p)/100 = 0.88
1.1(100 - p) = 88
100 - p = 80
p = 20
Answer C) 20.