Final answer:
To determine the remaining time on Kita's phone with 12% charge left, we calculate 12% of the full battery life of 18 hours, leading to approximately 2.16 hours of battery life remaining.
Step-by-step explanation:
To find out how much time is left on Kita's phone battery with a 12% charge remaining, we will use the information that the fully charged battery lasts 18 hours. Since 12% of the battery is remaining, we calculate 12% of 18 hours, which is (0.12 × 18) hours. Therefore, the formula we will use is:
Remaining Time (hours) = Total Battery Life (hours) × Percentage Remaining
Plugging the values we get:
Remaining Time (hours) = 18 × 0.12 = 2.16 hours
Thus, Kita has approximately 2.16 hours left on her phone battery.