Select the correct answer. A school supervisor wants to determine the percentage of students that bring their lunch to school.
Which of the following methods would assure random selection of a sample population?
O A
The supervisor should randomly select students from all grade levels taught at the school.
OB.
The supervisor should randomly select one grade level and survey all of the students in that grade.
OC.
A
The supervisor should select one grade level and survey randomly selected students from that grade.
The supervisor should survey all of the students enrolled in the school.
OD.

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.

answer

step-by-step explanation:

step-by-step explanation:

for volume, add base x height x width