Question

Type the correct answer in each box. Use numerals instead of words. Use + for addition, - for subtraction, * for multiplication, and / for division for the operation.
A machine drops 74 milliliters of liquid into a beaker every minute. Using an empty beaker, Sarah started the machine and left the room. When she returned, the beaker had 1,850 milliliters of liquid in it.
Select the correct operation that can be used to find the time in minutes, m, that Sarah was out of the room, and then find the value of m.

Sarah was out of the room for minutes.

Answer 1

First off,

> designate variables for all parts (the way i understand it better)
· \(a\) is the amount of liquid per minute,
· \(m\) is the given for the amount of minutes she was gone
· \(b\) for the amount of liquid in the beker when she got back
> get the amount she had when she got back
· \(1850\) mL of liquid

Then,

> aassuming that the amount is \(always\) 74 mL into the beaker, take the amount of liquid she had when she got back, and divide it by 74
· \(1,850 / 74\)
> the equation can simple be stated as
· \(74(m) = 1850\) (ab=m)

Finally,

> assuming you've done everything right, doing \(1850 / 74\) should give you the answer needed to solve for \(m\), and the equation is stated above.