A school janitor has mopped 1/3 of a classroom in 5 minutes. At what rate is he mopping?

1/15 classrooms per minute

Step-by-step explanation:

Find the janitor's rate in classrooms per minute. Divide

1/3

of a classroom by 5 minutes.

To divide by 5, multiply by its reciprocal, 1/5

.

1/3 ÷5 = 1/3 * 1/5 = 1/15

The janitor is mopping at a rate of 1/15 of a classroom per minute.

step-by-step explanation:

given that ab is divided into equal parts as

ac, cd, de, ef, fg, gh, hi, ib.

from this we find that f is the midpoint of ab.

so using mid point formula we find

f = (3,7)

similarly considering fb, we get

h = mid point of fb = ((6,6) and g, mid point of fh is

g = (9/2, 13/2)

i is mid point of hb

so i =(15/2,11/2)

the answer is:

mean: 6

mad: 2.14