Each side of a rectangle is increased in length by 20%. what is the percentage increase in the area? a) 20.0% b) 33.3% c) 40.0% d) 44.0%

Hello from MrBillDoesMath!

 D  ( 44%)

Discussion:

Suppose "x" is the length of a side and "y" is the width.  Then

Area = x * y

If "x" is increased by 20%, x becomes 1.2x. Same thing for "y" The area now becomes

Area = 1.2x * 1.2y  = 1.44 xy  

which is a 44% increase over the area of the original rectangle.

Answer is d.

Thank you,

MrB

t = 3

step-by-step explanation:

put t = 3 in this expression :

(3²-1)(3²-2)(3² - 3)(3² - 4) = 8×7×6×5 = 56×30 = 1680

ab will be equal to