Lewis needed to find the difference in lengths between the hypotenuse and the longest leg of this triangle. His work is shown below.

What errors did Lewis make? Check all that apply.
He simplified StartRoot 400 EndRoot incorrectly. It should be 20 instead of 200.
He found the difference between the hypotenuse and the short leg instead of the long leg.
He evaluated 12 squared incorrectly. It should be 12 (2) = 24.
He evaluated 16 squared incorrectly. It should be 16 (2) = 32.
He should not have taken the square root of each side to get rid of the exponent.

50-60=10

step-by-step explanation:

d. $180

step-by-step explanation:

if the dimensions of the room is 9ft by 12 ft, we have the area of the floor as,

so the area of the floor is 108 square feet, converting that into square yards we get,

the cost of carpet is $15 per square yard, therefore the cost of carpet for 12 square yards is,

hence, the cost of carpet is $180.

assuming the dimensions of the room be,

15 ft by 12 ft

so, the area of the floor of that room is,

we can convert 180 square feet into square yards, we know that,

1 sq ft = 0.111 sq yard

so, 180 square feet is,

so the area of floor is 20 square yards.

now, the cost of carpet is 15 dollars per square yard, therefore the cost of carpet for 20 square yards is,

so, it will cost $300.