Based on Diego's normal usage of his phone, if the battery is at 75%, the phone will not last the whole trip.
<h3>How long will the phone battery last?</h3>
First find out how long each percentage of battery life lasts:
= 15 / 100
= 0.15 hours
If Diego is going on a 12 hour trip with 75%, the length of time it would last is:
= 0.15 x 75
= 11.25 hours
This is less than the 12 hours required so the phone will not last the whole trip.
Rest of question:
At 100%, the battery can go for 15 hours.
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Answer:
You need to add more context to the question. I cannot answer it without knowing what "These scales" are.
Answer:

Step-by-step explanation:
Given

Required
Solve for s

Add
to both sides

Take LCM




178-35=143
143/5= 28.6
he paid $28.6 every month