Lea and marie are washing all the windows in their house. it would take lea 80 minutes to wash the windows by herself, and it would take marie 60 minutes to wash them by herself. lea creates a table so she can find out how long it will take to wash the windows if they work together. what is the missing value in the table that represents the rate for marie? rate time part of window washed
lea 1/80 t 1/80 t
marie ? t 1/60 t

The missing value is 1/60.

Step-by-step explanation:

Given,

The time taken by Marie to work alone = 60 days,

Since,

Thus, the work done by Marie in one day = ,

Hence, the rate of Marie = 1/60 per day,

Which is the missing value in the table.

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have