The number in brackets represents the percentage change
1.045
the 1 shows that it is an increase and the .045 shows the percent
for example 1.55 would be 55% increase and 1.555 would be 55.5% increase
300 dollars, 15x20 because they count any fraction as a foot, so is like you are going to buy 20 foot of carpet.
Just add up the lengths of the four sides, and you have the perimeter.
The perimeter is:
(4x-7)*2 + (10x^2+4x-2)*2 =
8x-14 + 20x^2+8x-4 =
20x^2 + 16x - 18
The answer is 64.4 because you multiply 92 times 0.7 and get 64.4
