Amachine can fill a box with twenty pencils in 30 seconds. how many boxes can the machine fill in 2 hours?

use conversion:

1 hour = 3600 seconds.

As per the given statement:

A machine can fill a box with twenty pencils in 30 seconds.

Number of pencils = 20

Time = 30 seconds = hours.

then by definition of unit rate;

we have to find the number of boxes can the machine fill in 2 hours.

Substitute the given values we have;

it is given that:

20 pencils fill = 1 box

4800 pencils fill = 240 boxes

Therefore, 240 boxes can the machine fill with 4800 pencils  in 2 hours

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answer: city needs 2.4 inches of rainfall more to match the record of 40 inches.

step-by-step explanation:

since we have given that

total annual rainfall a city record = 40 inches

this year, total rainfall recorded = 37.6 inches

number of inches of rainfall   is needed to match the record of 40 inches is given by

hence, city needs 2.4 inches of rainfall more to match the record of 40 inches.