Question

Mandana is ordering new tile for her kitchen floor. The area of the floor is 119.9 square feet, and she wants to order between 15% and 20% extra of the materials. Which of the following is a reasonable amount of tile for Mandana to order?
A.
134 square feet
B.
140 square feet
C.
137 square feet
D.
145 square feet

Answer 1

Answer:

B.  140 square feet

Step-by-step explanation:

The area of the floor is 119.9 square feet.

Mandana wants to order between 15% and 20% extra of the materials.

15% of 119.9 = $0.15\times119.9=17.985$

= $119.9+17.985=137.88$ square feet rounding to 138 sq feet.

20% of 119.9 = $0.20\times119.9=23.98$

= $119.9+23.98=143.88$ square feet rounding to 144 sq feet.

We can see that 140 sq feet lies between these two values.

So, the answer is 140 square feet.

Answer 2

Answer: B

Multiply the square feet, 119.9, by 1.15 and find the answer near that