Question

rachels fish tank has 18 liters of water in it. she plans to add 4 liters per minute until the tank has at least 66 liters. what are the possible numbers of minutes rachel could add water? use t for the number of minutes. write your answer as an inequality solved for t.

Explanation:

Step1: Define the total water

The initial water is 18 liters, and she adds 4 liters per minute for \( t \) minutes. So total water is \( 18 + 4t \) liters.

Step2: Set up the inequality

We need total water to be at least 66 liters, so \( 18 + 4t \geq 66 \).

Step3: Solve for \( t \)

Subtract 18 from both sides: \( 4t \geq 66 - 18 \)
Simplify: \( 4t \geq 48 \)
Divide both sides by 4: \( t \geq 12 \)

Answer:

\( t \geq 12 \)