Answer: 
Step-by-step explanation:
Given
New mail carrier takes 4 hours for delivery i.e.
New mail carrier completes
part of work in 1 hour
Old mail carrier takes 3 hours for delivery i.e.
mail carrier completes
part of work in 1 hour
If they work together, they complete the work in x hours i.e.

The answer is going to be A!!!
The sum of the individual lunch ate by people is equal to the total number of people who ate lunch.
<h3>What is an
equation?</h3>
An equationi is an expression that shows the relationship between two or more variables and number.
Given that the total number of people who ate lunch is 840, hence:
The sum of the individual lunch ate by people is equal to the total number of people who ate lunch.
Find out more on equation at: brainly.com/question/2972832
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Answer:
2954.91088758
Step-by-step explanation:
exact answer
The answer is you add 0.05 every time