if 20 men working together can finish a job in 20 days then the number of days taken by 25 men of the same capacity to finish the job is

16 days hope that helps

Step-by-step explanation:

20 people 20 days

20 •20=400

400÷25 = 16

20x20 =400 then 400/25 = 16 Days

Step-by-step explanation:

Always multiply the amounts of initial men x initail days

then divide by the new amount of men

With other questions for tag fish and sample fish in pond questions

They ask how many fish are estimated to be on the pond.

= The amount of fish caught next day divided by the amount of fish tagged and found in that same catch.

Then multiplied by the amount of all fish tagged initially the day before.

To find random amount in pool.

This is the same method but reversed.

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)